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@ -3713,11 +3713,11 @@
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<p>我们可以将 0-1 背包问题看作一个由 <span class="arithmatex">\(n\)</span> 轮决策组成的过程，对于每个物体都有不放入和放入两种决策，因此该问题满足决策树模型。</p>
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<p>该问题的目标是求解“在限定背包容量下能放入物品的最大价值”，因此较大概率是一个动态规划问题。</p>
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<p><strong>第一步：思考每轮的决策，定义状态，从而得到 <span class="arithmatex">\(dp\)</span> 表</strong></p>
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<p>对于每个物品来说，不放入背包，背包容量不变；放入背包，背包容量减小。由此可得状态定义：当前物品编号 <span class="arithmatex">\(i\)</span> 和剩余背包容量 <span class="arithmatex">\(c\)</span> ，记为 <span class="arithmatex">\([i, c]\)</span> 。</p>
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<p>状态 <span class="arithmatex">\([i, c]\)</span> 对应的子问题为：<strong>前 <span class="arithmatex">\(i\)</span> 个物品在剩余容量为 <span class="arithmatex">\(c\)</span> 的背包中的最大价值</strong>，记为 <span class="arithmatex">\(dp[i, c]\)</span> 。</p>
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<p>对于每个物品来说，不放入背包，背包容量不变；放入背包，背包容量减小。由此可得状态定义：当前物品编号 <span class="arithmatex">\(i\)</span> 和背包容量 <span class="arithmatex">\(c\)</span> ，记为 <span class="arithmatex">\([i, c]\)</span> 。</p>
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<p>状态 <span class="arithmatex">\([i, c]\)</span> 对应的子问题为：<strong>前 <span class="arithmatex">\(i\)</span> 个物品在容量为 <span class="arithmatex">\(c\)</span> 的背包中的最大价值</strong>，记为 <span class="arithmatex">\(dp[i, c]\)</span> 。</p>
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<p>待求解的是 <span class="arithmatex">\(dp[n, cap]\)</span> ，因此需要一个尺寸为 <span class="arithmatex">\((n+1) \times (cap+1)\)</span> 的二维 <span class="arithmatex">\(dp\)</span> 表。</p>
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<p><strong>第二步：找出最优子结构，进而推导出状态转移方程</strong></p>
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<p>当我们做出物品 <span class="arithmatex">\(i\)</span> 的决策后，剩余的是前 <span class="arithmatex">\(i-1\)</span> 个物品的决策，可分为以下两种情况。</p>
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<p>当我们做出物品 <span class="arithmatex">\(i\)</span> 的决策后，剩余的是前 <span class="arithmatex">\(i-1\)</span> 个物品决策的子问题，可分为以下两种情况。</p>
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<ul>
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<li><strong>不放入物品 <span class="arithmatex">\(i\)</span></strong> ：背包容量不变，状态变化为 <span class="arithmatex">\([i-1, c]\)</span> 。</li>
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<li><strong>放入物品 <span class="arithmatex">\(i\)</span></strong> ：背包容量减少 <span class="arithmatex">\(wgt[i-1]\)</span> ，价值增加 <span class="arithmatex">\(val[i-1]\)</span> ，状态变化为 <span class="arithmatex">\([i-1, c-wgt[i-1]]\)</span> 。</li>
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@ -3728,7 +3728,7 @@ dp[i, c] = \max(dp[i-1, c], dp[i-1, c - wgt[i-1]] + val[i-1])
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\]</div>
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<p>需要注意的是，若当前物品重量 <span class="arithmatex">\(wgt[i - 1]\)</span> 超出剩余背包容量 <span class="arithmatex">\(c\)</span> ，则只能选择不放入背包。</p>
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<p><strong>第三步：确定边界条件和状态转移顺序</strong></p>
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<p>当无物品或无剩余背包容量时最大价值为 <span class="arithmatex">\(0\)</span> ，即首列 <span class="arithmatex">\(dp[i, 0]\)</span> 和首行 <span class="arithmatex">\(dp[0, c]\)</span> 都等于 <span class="arithmatex">\(0\)</span> 。</p>
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<p>当无物品或背包容量为 <span class="arithmatex">\(0\)</span> 时最大价值为 <span class="arithmatex">\(0\)</span> ，即首列 <span class="arithmatex">\(dp[i, 0]\)</span> 和首行 <span class="arithmatex">\(dp[0, c]\)</span> 都等于 <span class="arithmatex">\(0\)</span> 。</p>
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<p>当前状态 <span class="arithmatex">\([i, c]\)</span> 从上方的状态 <span class="arithmatex">\([i-1, c]\)</span> 和左上方的状态 <span class="arithmatex">\([i-1, c-wgt[i-1]]\)</span> 转移而来，因此通过两层循环正序遍历整个 <span class="arithmatex">\(dp\)</span> 表即可。</p>
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<p>根据以上分析，我们接下来按顺序实现暴力搜索、记忆化搜索、动态规划解法。</p>
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<h3 id="1">1. 方法一：暴力搜索<a class="headerlink" href="#1" title="Permanent link">¶</a></h3>
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@ -3602,7 +3602,7 @@
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<p><strong>背包问题</strong></p>
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<ul>
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<li>背包问题是最典型的动态规划问题之一，具有 0-1 背包、完全背包、多重背包等变种。</li>
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<li>0-1 背包的状态定义为前 <span class="arithmatex">\(i\)</span> 个物品在剩余容量为 <span class="arithmatex">\(c\)</span> 的背包中的最大价值。根据不放入背包和放入背包两种决策，可得到最优子结构，并构建出状态转移方程。在空间优化中，由于每个状态依赖正上方和左上方的状态，因此需要倒序遍历列表，避免左上方状态被覆盖。</li>
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<li>0-1 背包的状态定义为前 <span class="arithmatex">\(i\)</span> 个物品在容量为 <span class="arithmatex">\(c\)</span> 的背包中的最大价值。根据不放入背包和放入背包两种决策，可得到最优子结构，并构建出状态转移方程。在空间优化中，由于每个状态依赖正上方和左上方的状态，因此需要倒序遍历列表，避免左上方状态被覆盖。</li>
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<li>完全背包问题的每种物品的选取数量无限制，因此选择放入物品的状态转移与 0-1 背包问题不同。由于状态依赖正上方和正左方的状态，因此在空间优化中应当正序遍历。</li>
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<li>零钱兑换问题是完全背包问题的一个变种。它从求“最大”价值变为求“最小”硬币数量，因此状态转移方程中的 <span class="arithmatex">\(\max()\)</span> 应改为 <span class="arithmatex">\(\min()\)</span> 。从追求“不超过”背包容量到追求“恰好”凑出目标金额，因此使用 <span class="arithmatex">\(amt + 1\)</span> 来表示“无法凑出目标金额”的无效解。</li>
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<li>零钱兑换问题 II 从求“最少硬币数量”改为求“硬币组合数量”，状态转移方程相应地从 <span class="arithmatex">\(\min()\)</span> 改为求和运算符。</li>
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@ -4262,13 +4262,45 @@
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</code></pre></div>
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</div>
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<div class="tabbed-block">
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<div class="highlight"><span class="filename">simple_hash.rb</span><pre><span></span><code><a id="__codelineno-13-1" name="__codelineno-13-1" href="#__codelineno-13-1"></a><span class="o">[</span><span class="n">class</span><span class="o">]</span><span class="p">{}</span><span class="o">-[</span><span class="n">func</span><span class="o">]</span><span class="p">{</span><span class="n">add_hash</span><span class="p">}</span>
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<a id="__codelineno-13-2" name="__codelineno-13-2" href="#__codelineno-13-2"></a>
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<a id="__codelineno-13-3" name="__codelineno-13-3" href="#__codelineno-13-3"></a><span class="o">[</span><span class="n">class</span><span class="o">]</span><span class="p">{}</span><span class="o">-[</span><span class="n">func</span><span class="o">]</span><span class="p">{</span><span class="n">mul_hash</span><span class="p">}</span>
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<a id="__codelineno-13-4" name="__codelineno-13-4" href="#__codelineno-13-4"></a>
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<a id="__codelineno-13-5" name="__codelineno-13-5" href="#__codelineno-13-5"></a><span class="o">[</span><span class="n">class</span><span class="o">]</span><span class="p">{}</span><span class="o">-[</span><span class="n">func</span><span class="o">]</span><span class="p">{</span><span class="n">xor_hash</span><span class="p">}</span>
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<a id="__codelineno-13-6" name="__codelineno-13-6" href="#__codelineno-13-6"></a>
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<a id="__codelineno-13-7" name="__codelineno-13-7" href="#__codelineno-13-7"></a><span class="o">[</span><span class="n">class</span><span class="o">]</span><span class="p">{}</span><span class="o">-[</span><span class="n">func</span><span class="o">]</span><span class="p">{</span><span class="n">rot_hash</span><span class="p">}</span>
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<div class="highlight"><span class="filename">simple_hash.rb</span><pre><span></span><code><a id="__codelineno-13-1" name="__codelineno-13-1" href="#__codelineno-13-1"></a><span class="c1">### 加法哈希 ###</span>
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<a id="__codelineno-13-2" name="__codelineno-13-2" href="#__codelineno-13-2"></a><span class="k">def</span><span class="w"> </span><span class="nf">add_hash</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
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<a id="__codelineno-13-3" name="__codelineno-13-3" href="#__codelineno-13-3"></a><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span>
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<a id="__codelineno-13-4" name="__codelineno-13-4" href="#__codelineno-13-4"></a><span class="w"> </span><span class="n">modulus</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">1_000_000_007</span>
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<a id="__codelineno-13-5" name="__codelineno-13-5" href="#__codelineno-13-5"></a>
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<a id="__codelineno-13-6" name="__codelineno-13-6" href="#__codelineno-13-6"></a><span class="w"> </span><span class="n">key</span><span class="o">.</span><span class="n">each_char</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">|</span><span class="n">c</span><span class="o">|</span><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">+=</span><span class="w"> </span><span class="n">c</span><span class="o">.</span><span class="n">ord</span><span class="w"> </span><span class="p">}</span>
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<a id="__codelineno-13-7" name="__codelineno-13-7" href="#__codelineno-13-7"></a>
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<a id="__codelineno-13-8" name="__codelineno-13-8" href="#__codelineno-13-8"></a><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">%</span><span class="w"> </span><span class="n">modulus</span>
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<a id="__codelineno-13-9" name="__codelineno-13-9" href="#__codelineno-13-9"></a><span class="k">end</span>
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<a id="__codelineno-13-10" name="__codelineno-13-10" href="#__codelineno-13-10"></a>
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<a id="__codelineno-13-11" name="__codelineno-13-11" href="#__codelineno-13-11"></a><span class="c1">### 乘法哈希 ###</span>
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<a id="__codelineno-13-12" name="__codelineno-13-12" href="#__codelineno-13-12"></a><span class="k">def</span><span class="w"> </span><span class="nf">mul_hash</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
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<a id="__codelineno-13-13" name="__codelineno-13-13" href="#__codelineno-13-13"></a><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span>
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<a id="__codelineno-13-14" name="__codelineno-13-14" href="#__codelineno-13-14"></a><span class="w"> </span><span class="n">modulus</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">1_000_000_007</span>
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<a id="__codelineno-13-15" name="__codelineno-13-15" href="#__codelineno-13-15"></a>
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<a id="__codelineno-13-16" name="__codelineno-13-16" href="#__codelineno-13-16"></a><span class="w"> </span><span class="n">key</span><span class="o">.</span><span class="n">each_char</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">|</span><span class="n">c</span><span class="o">|</span><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">31</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">c</span><span class="o">.</span><span class="n">ord</span><span class="w"> </span><span class="p">}</span>
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<a id="__codelineno-13-17" name="__codelineno-13-17" href="#__codelineno-13-17"></a>
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<a id="__codelineno-13-18" name="__codelineno-13-18" href="#__codelineno-13-18"></a><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">%</span><span class="w"> </span><span class="n">modulus</span>
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<a id="__codelineno-13-19" name="__codelineno-13-19" href="#__codelineno-13-19"></a><span class="k">end</span>
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<a id="__codelineno-13-20" name="__codelineno-13-20" href="#__codelineno-13-20"></a>
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<a id="__codelineno-13-21" name="__codelineno-13-21" href="#__codelineno-13-21"></a><span class="c1">### 异或哈希 ###</span>
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<a id="__codelineno-13-22" name="__codelineno-13-22" href="#__codelineno-13-22"></a><span class="k">def</span><span class="w"> </span><span class="nf">xor_hash</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
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<a id="__codelineno-13-23" name="__codelineno-13-23" href="#__codelineno-13-23"></a><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span>
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<a id="__codelineno-13-24" name="__codelineno-13-24" href="#__codelineno-13-24"></a><span class="w"> </span><span class="n">modulus</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">1_000_000_007</span>
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<a id="__codelineno-13-25" name="__codelineno-13-25" href="#__codelineno-13-25"></a>
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<a id="__codelineno-13-26" name="__codelineno-13-26" href="#__codelineno-13-26"></a><span class="w"> </span><span class="n">key</span><span class="o">.</span><span class="n">each_char</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">|</span><span class="n">c</span><span class="o">|</span><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">^=</span><span class="w"> </span><span class="n">c</span><span class="o">.</span><span class="n">ord</span><span class="w"> </span><span class="p">}</span>
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<a id="__codelineno-13-27" name="__codelineno-13-27" href="#__codelineno-13-27"></a>
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<a id="__codelineno-13-28" name="__codelineno-13-28" href="#__codelineno-13-28"></a><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">%</span><span class="w"> </span><span class="n">modulus</span>
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<a id="__codelineno-13-29" name="__codelineno-13-29" href="#__codelineno-13-29"></a><span class="k">end</span>
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<a id="__codelineno-13-30" name="__codelineno-13-30" href="#__codelineno-13-30"></a>
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<a id="__codelineno-13-31" name="__codelineno-13-31" href="#__codelineno-13-31"></a><span class="c1">### 旋转哈希 ###</span>
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<a id="__codelineno-13-32" name="__codelineno-13-32" href="#__codelineno-13-32"></a><span class="k">def</span><span class="w"> </span><span class="nf">rot_hash</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
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<a id="__codelineno-13-33" name="__codelineno-13-33" href="#__codelineno-13-33"></a><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span>
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<a id="__codelineno-13-34" name="__codelineno-13-34" href="#__codelineno-13-34"></a><span class="w"> </span><span class="n">modulus</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">1_000_000_007</span>
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<a id="__codelineno-13-35" name="__codelineno-13-35" href="#__codelineno-13-35"></a>
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<a id="__codelineno-13-36" name="__codelineno-13-36" href="#__codelineno-13-36"></a><span class="w"> </span><span class="n">key</span><span class="o">.</span><span class="n">each_char</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">|</span><span class="n">c</span><span class="o">|</span><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="nb">hash</span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="mi">4</span><span class="p">)</span><span class="w"> </span><span class="o">^</span><span class="w"> </span><span class="p">(</span><span class="nb">hash</span><span class="w"> </span><span class="o">>></span><span class="w"> </span><span class="mi">28</span><span class="p">)</span><span class="w"> </span><span class="o">^</span><span class="w"> </span><span class="n">c</span><span class="o">.</span><span class="n">ord</span><span class="w"> </span><span class="p">}</span>
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<a id="__codelineno-13-37" name="__codelineno-13-37" href="#__codelineno-13-37"></a>
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<a id="__codelineno-13-38" name="__codelineno-13-38" href="#__codelineno-13-38"></a><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">%</span><span class="w"> </span><span class="n">modulus</span>
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<a id="__codelineno-13-39" name="__codelineno-13-39" href="#__codelineno-13-39"></a><span class="k">end</span>
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</code></pre></div>
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</div>
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<div class="tabbed-block">
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@ -4618,7 +4650,29 @@
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</code></pre></div>
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</div>
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<div class="tabbed-block">
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<div class="highlight"><span class="filename">built_in_hash.rb</span><pre><span></span><code><a id="__codelineno-27-1" name="__codelineno-27-1" href="#__codelineno-27-1"></a>
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<div class="highlight"><span class="filename">built_in_hash.rb</span><pre><span></span><code><a id="__codelineno-27-1" name="__codelineno-27-1" href="#__codelineno-27-1"></a><span class="n">num</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">3</span>
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<a id="__codelineno-27-2" name="__codelineno-27-2" href="#__codelineno-27-2"></a><span class="n">hash_num</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">num</span><span class="o">.</span><span class="n">hash</span>
|
||||
<a id="__codelineno-27-3" name="__codelineno-27-3" href="#__codelineno-27-3"></a><span class="c1"># 整数 3 的哈希值为 -4385856518450339636</span>
|
||||
<a id="__codelineno-27-4" name="__codelineno-27-4" href="#__codelineno-27-4"></a>
|
||||
<a id="__codelineno-27-5" name="__codelineno-27-5" href="#__codelineno-27-5"></a><span class="n">bol</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="kp">true</span>
|
||||
<a id="__codelineno-27-6" name="__codelineno-27-6" href="#__codelineno-27-6"></a><span class="n">hash_bol</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">bol</span><span class="o">.</span><span class="n">hash</span>
|
||||
<a id="__codelineno-27-7" name="__codelineno-27-7" href="#__codelineno-27-7"></a><span class="c1"># 布尔量 true 的哈希值为 -1617938112149317027</span>
|
||||
<a id="__codelineno-27-8" name="__codelineno-27-8" href="#__codelineno-27-8"></a>
|
||||
<a id="__codelineno-27-9" name="__codelineno-27-9" href="#__codelineno-27-9"></a><span class="n">dec</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">3</span><span class="o">.</span><span class="mi">14159</span>
|
||||
<a id="__codelineno-27-10" name="__codelineno-27-10" href="#__codelineno-27-10"></a><span class="n">hash_dec</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">dec</span><span class="o">.</span><span class="n">hash</span>
|
||||
<a id="__codelineno-27-11" name="__codelineno-27-11" href="#__codelineno-27-11"></a><span class="c1"># 小数 3.14159 的哈希值为 -1479186995943067893</span>
|
||||
<a id="__codelineno-27-12" name="__codelineno-27-12" href="#__codelineno-27-12"></a>
|
||||
<a id="__codelineno-27-13" name="__codelineno-27-13" href="#__codelineno-27-13"></a><span class="n">str</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">"Hello 算法"</span>
|
||||
<a id="__codelineno-27-14" name="__codelineno-27-14" href="#__codelineno-27-14"></a><span class="n">hash_str</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">str</span><span class="o">.</span><span class="n">hash</span>
|
||||
<a id="__codelineno-27-15" name="__codelineno-27-15" href="#__codelineno-27-15"></a><span class="c1"># 字符串“Hello 算法”的哈希值为 -4075943250025831763</span>
|
||||
<a id="__codelineno-27-16" name="__codelineno-27-16" href="#__codelineno-27-16"></a>
|
||||
<a id="__codelineno-27-17" name="__codelineno-27-17" href="#__codelineno-27-17"></a><span class="n">tup</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="o">[</span><span class="mi">12836</span><span class="p">,</span><span class="w"> </span><span class="s1">'小哈'</span><span class="o">]</span>
|
||||
<a id="__codelineno-27-18" name="__codelineno-27-18" href="#__codelineno-27-18"></a><span class="n">hash_tup</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">tup</span><span class="o">.</span><span class="n">hash</span>
|
||||
<a id="__codelineno-27-19" name="__codelineno-27-19" href="#__codelineno-27-19"></a><span class="c1"># 元组 (12836, '小哈') 的哈希值为 1999544809202288822</span>
|
||||
<a id="__codelineno-27-20" name="__codelineno-27-20" href="#__codelineno-27-20"></a>
|
||||
<a id="__codelineno-27-21" name="__codelineno-27-21" href="#__codelineno-27-21"></a><span class="n">obj</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="no">ListNode</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span>
|
||||
<a id="__codelineno-27-22" name="__codelineno-27-22" href="#__codelineno-27-22"></a><span class="n">hash_obj</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">obj</span><span class="o">.</span><span class="n">hash</span>
|
||||
<a id="__codelineno-27-23" name="__codelineno-27-23" href="#__codelineno-27-23"></a><span class="c1"># 节点对象 #<ListNode:0x000078133140ab70> 的哈希值为 4302940560806366381</span>
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
|
||||
@ -5141,7 +5141,99 @@
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
<div class="highlight"><span class="filename">hash_map_chaining.rb</span><pre><span></span><code><a id="__codelineno-12-1" name="__codelineno-12-1" href="#__codelineno-12-1"></a><span class="o">[</span><span class="n">class</span><span class="o">]</span><span class="p">{</span><span class="no">HashMapChaining</span><span class="p">}</span><span class="o">-[</span><span class="n">func</span><span class="o">]</span><span class="p">{}</span>
|
||||
<div class="highlight"><span class="filename">hash_map_chaining.rb</span><pre><span></span><code><a id="__codelineno-12-1" name="__codelineno-12-1" href="#__codelineno-12-1"></a><span class="c1">### 键式地址哈希表 ###</span>
|
||||
<a id="__codelineno-12-2" name="__codelineno-12-2" href="#__codelineno-12-2"></a><span class="k">class</span><span class="w"> </span><span class="nc">HashMapChaining</span>
|
||||
<a id="__codelineno-12-3" name="__codelineno-12-3" href="#__codelineno-12-3"></a><span class="w"> </span><span class="c1">### 构造方法 ###</span>
|
||||
<a id="__codelineno-12-4" name="__codelineno-12-4" href="#__codelineno-12-4"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">initialize</span>
|
||||
<a id="__codelineno-12-5" name="__codelineno-12-5" href="#__codelineno-12-5"></a><span class="w"> </span><span class="vi">@size</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span><span class="w"> </span><span class="c1"># 键值对数量</span>
|
||||
<a id="__codelineno-12-6" name="__codelineno-12-6" href="#__codelineno-12-6"></a><span class="w"> </span><span class="vi">@capacity</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">4</span><span class="w"> </span><span class="c1"># 哈希表容量</span>
|
||||
<a id="__codelineno-12-7" name="__codelineno-12-7" href="#__codelineno-12-7"></a><span class="w"> </span><span class="vi">@load_thres</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">2</span><span class="o">.</span><span class="mi">0</span><span class="w"> </span><span class="o">/</span><span class="w"> </span><span class="mi">3</span><span class="o">.</span><span class="mi">0</span><span class="w"> </span><span class="c1"># 触发扩容的负载因子阈值</span>
|
||||
<a id="__codelineno-12-8" name="__codelineno-12-8" href="#__codelineno-12-8"></a><span class="w"> </span><span class="vi">@extend_ratio</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">2</span><span class="w"> </span><span class="c1"># 扩容倍数</span>
|
||||
<a id="__codelineno-12-9" name="__codelineno-12-9" href="#__codelineno-12-9"></a><span class="w"> </span><span class="vi">@buckets</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">Array</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="vi">@capacity</span><span class="p">)</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">[]</span><span class="w"> </span><span class="p">}</span><span class="w"> </span><span class="c1"># 桶数组</span>
|
||||
<a id="__codelineno-12-10" name="__codelineno-12-10" href="#__codelineno-12-10"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-11" name="__codelineno-12-11" href="#__codelineno-12-11"></a>
|
||||
<a id="__codelineno-12-12" name="__codelineno-12-12" href="#__codelineno-12-12"></a><span class="w"> </span><span class="c1">### 哈希函数 ###</span>
|
||||
<a id="__codelineno-12-13" name="__codelineno-12-13" href="#__codelineno-12-13"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">hash_func</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-12-14" name="__codelineno-12-14" href="#__codelineno-12-14"></a><span class="w"> </span><span class="n">key</span><span class="w"> </span><span class="o">%</span><span class="w"> </span><span class="vi">@capacity</span>
|
||||
<a id="__codelineno-12-15" name="__codelineno-12-15" href="#__codelineno-12-15"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-16" name="__codelineno-12-16" href="#__codelineno-12-16"></a>
|
||||
<a id="__codelineno-12-17" name="__codelineno-12-17" href="#__codelineno-12-17"></a><span class="w"> </span><span class="c1">### 负载因子 ###</span>
|
||||
<a id="__codelineno-12-18" name="__codelineno-12-18" href="#__codelineno-12-18"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">load_factor</span>
|
||||
<a id="__codelineno-12-19" name="__codelineno-12-19" href="#__codelineno-12-19"></a><span class="w"> </span><span class="vi">@size</span><span class="w"> </span><span class="o">/</span><span class="w"> </span><span class="vi">@capacity</span>
|
||||
<a id="__codelineno-12-20" name="__codelineno-12-20" href="#__codelineno-12-20"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-21" name="__codelineno-12-21" href="#__codelineno-12-21"></a>
|
||||
<a id="__codelineno-12-22" name="__codelineno-12-22" href="#__codelineno-12-22"></a><span class="w"> </span><span class="c1">### 查询操作 ###</span>
|
||||
<a id="__codelineno-12-23" name="__codelineno-12-23" href="#__codelineno-12-23"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">get</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-12-24" name="__codelineno-12-24" href="#__codelineno-12-24"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">hash_func</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-12-25" name="__codelineno-12-25" href="#__codelineno-12-25"></a><span class="w"> </span><span class="n">bucket</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span>
|
||||
<a id="__codelineno-12-26" name="__codelineno-12-26" href="#__codelineno-12-26"></a><span class="w"> </span><span class="c1"># 遍历桶，若找到 key ，则返回对应 val</span>
|
||||
<a id="__codelineno-12-27" name="__codelineno-12-27" href="#__codelineno-12-27"></a><span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="n">bucket</span>
|
||||
<a id="__codelineno-12-28" name="__codelineno-12-28" href="#__codelineno-12-28"></a><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">val</span><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">key</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="n">key</span>
|
||||
<a id="__codelineno-12-29" name="__codelineno-12-29" href="#__codelineno-12-29"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-30" name="__codelineno-12-30" href="#__codelineno-12-30"></a><span class="w"> </span><span class="c1"># 若未找到 key , 则返回 nil</span>
|
||||
<a id="__codelineno-12-31" name="__codelineno-12-31" href="#__codelineno-12-31"></a><span class="w"> </span><span class="kp">nil</span>
|
||||
<a id="__codelineno-12-32" name="__codelineno-12-32" href="#__codelineno-12-32"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-33" name="__codelineno-12-33" href="#__codelineno-12-33"></a>
|
||||
<a id="__codelineno-12-34" name="__codelineno-12-34" href="#__codelineno-12-34"></a><span class="w"> </span><span class="c1">### 添加操作 ###</span>
|
||||
<a id="__codelineno-12-35" name="__codelineno-12-35" href="#__codelineno-12-35"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">put</span><span class="p">(</span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">val</span><span class="p">)</span>
|
||||
<a id="__codelineno-12-36" name="__codelineno-12-36" href="#__codelineno-12-36"></a><span class="w"> </span><span class="c1"># 当负载因子超过阈值时，执行扩容</span>
|
||||
<a id="__codelineno-12-37" name="__codelineno-12-37" href="#__codelineno-12-37"></a><span class="w"> </span><span class="kp">extend</span><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="n">load_factor</span><span class="w"> </span><span class="o">></span><span class="w"> </span><span class="vi">@load_thres</span>
|
||||
<a id="__codelineno-12-38" name="__codelineno-12-38" href="#__codelineno-12-38"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">hash_func</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-12-39" name="__codelineno-12-39" href="#__codelineno-12-39"></a><span class="w"> </span><span class="n">bucket</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span>
|
||||
<a id="__codelineno-12-40" name="__codelineno-12-40" href="#__codelineno-12-40"></a><span class="w"> </span><span class="c1"># 遍历桶，若遇到指定 key ，则更新对应 val 并返回</span>
|
||||
<a id="__codelineno-12-41" name="__codelineno-12-41" href="#__codelineno-12-41"></a><span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="n">bucket</span>
|
||||
<a id="__codelineno-12-42" name="__codelineno-12-42" href="#__codelineno-12-42"></a><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">key</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="n">key</span>
|
||||
<a id="__codelineno-12-43" name="__codelineno-12-43" href="#__codelineno-12-43"></a><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">val</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">val</span>
|
||||
<a id="__codelineno-12-44" name="__codelineno-12-44" href="#__codelineno-12-44"></a><span class="w"> </span><span class="k">return</span>
|
||||
<a id="__codelineno-12-45" name="__codelineno-12-45" href="#__codelineno-12-45"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-46" name="__codelineno-12-46" href="#__codelineno-12-46"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-47" name="__codelineno-12-47" href="#__codelineno-12-47"></a><span class="w"> </span><span class="c1"># 若无该 key ，则将键值对添加至尾部</span>
|
||||
<a id="__codelineno-12-48" name="__codelineno-12-48" href="#__codelineno-12-48"></a><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="no">Pair</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">val</span><span class="p">)</span>
|
||||
<a id="__codelineno-12-49" name="__codelineno-12-49" href="#__codelineno-12-49"></a><span class="w"> </span><span class="n">bucket</span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="n">pair</span>
|
||||
<a id="__codelineno-12-50" name="__codelineno-12-50" href="#__codelineno-12-50"></a><span class="w"> </span><span class="vi">@size</span><span class="w"> </span><span class="o">+=</span><span class="w"> </span><span class="mi">1</span>
|
||||
<a id="__codelineno-12-51" name="__codelineno-12-51" href="#__codelineno-12-51"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-52" name="__codelineno-12-52" href="#__codelineno-12-52"></a>
|
||||
<a id="__codelineno-12-53" name="__codelineno-12-53" href="#__codelineno-12-53"></a><span class="w"> </span><span class="c1">### 删除操作 ###</span>
|
||||
<a id="__codelineno-12-54" name="__codelineno-12-54" href="#__codelineno-12-54"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">remove</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-12-55" name="__codelineno-12-55" href="#__codelineno-12-55"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">hash_func</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-12-56" name="__codelineno-12-56" href="#__codelineno-12-56"></a><span class="w"> </span><span class="n">bucket</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span>
|
||||
<a id="__codelineno-12-57" name="__codelineno-12-57" href="#__codelineno-12-57"></a><span class="w"> </span><span class="c1"># 遍历桶，从中删除键值对</span>
|
||||
<a id="__codelineno-12-58" name="__codelineno-12-58" href="#__codelineno-12-58"></a><span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="n">bucket</span>
|
||||
<a id="__codelineno-12-59" name="__codelineno-12-59" href="#__codelineno-12-59"></a><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">key</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="n">key</span>
|
||||
<a id="__codelineno-12-60" name="__codelineno-12-60" href="#__codelineno-12-60"></a><span class="w"> </span><span class="n">bucket</span><span class="o">.</span><span class="n">delete</span><span class="p">(</span><span class="n">pair</span><span class="p">)</span>
|
||||
<a id="__codelineno-12-61" name="__codelineno-12-61" href="#__codelineno-12-61"></a><span class="w"> </span><span class="vi">@size</span><span class="w"> </span><span class="o">-=</span><span class="w"> </span><span class="mi">1</span>
|
||||
<a id="__codelineno-12-62" name="__codelineno-12-62" href="#__codelineno-12-62"></a><span class="w"> </span><span class="k">break</span>
|
||||
<a id="__codelineno-12-63" name="__codelineno-12-63" href="#__codelineno-12-63"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-64" name="__codelineno-12-64" href="#__codelineno-12-64"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-65" name="__codelineno-12-65" href="#__codelineno-12-65"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-66" name="__codelineno-12-66" href="#__codelineno-12-66"></a>
|
||||
<a id="__codelineno-12-67" name="__codelineno-12-67" href="#__codelineno-12-67"></a><span class="w"> </span><span class="c1">### 扩容哈希表 ###</span>
|
||||
<a id="__codelineno-12-68" name="__codelineno-12-68" href="#__codelineno-12-68"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">extend</span>
|
||||
<a id="__codelineno-12-69" name="__codelineno-12-69" href="#__codelineno-12-69"></a><span class="w"> </span><span class="c1"># 暫存原哈希表</span>
|
||||
<a id="__codelineno-12-70" name="__codelineno-12-70" href="#__codelineno-12-70"></a><span class="w"> </span><span class="n">buckets</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="vi">@buckets</span>
|
||||
<a id="__codelineno-12-71" name="__codelineno-12-71" href="#__codelineno-12-71"></a><span class="w"> </span><span class="c1"># 初始化扩容后的新哈希表</span>
|
||||
<a id="__codelineno-12-72" name="__codelineno-12-72" href="#__codelineno-12-72"></a><span class="w"> </span><span class="vi">@capacity</span><span class="w"> </span><span class="o">*=</span><span class="w"> </span><span class="vi">@extend_ratio</span>
|
||||
<a id="__codelineno-12-73" name="__codelineno-12-73" href="#__codelineno-12-73"></a><span class="w"> </span><span class="vi">@buckets</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">Array</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="vi">@capacity</span><span class="p">)</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">[]</span><span class="w"> </span><span class="p">}</span>
|
||||
<a id="__codelineno-12-74" name="__codelineno-12-74" href="#__codelineno-12-74"></a><span class="w"> </span><span class="vi">@size</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span>
|
||||
<a id="__codelineno-12-75" name="__codelineno-12-75" href="#__codelineno-12-75"></a><span class="w"> </span><span class="c1"># 将键值对从原哈希表搬运至新哈希表</span>
|
||||
<a id="__codelineno-12-76" name="__codelineno-12-76" href="#__codelineno-12-76"></a><span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="n">bucket</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="n">buckets</span>
|
||||
<a id="__codelineno-12-77" name="__codelineno-12-77" href="#__codelineno-12-77"></a><span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="n">bucket</span>
|
||||
<a id="__codelineno-12-78" name="__codelineno-12-78" href="#__codelineno-12-78"></a><span class="w"> </span><span class="n">put</span><span class="p">(</span><span class="n">pair</span><span class="o">.</span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">val</span><span class="p">)</span>
|
||||
<a id="__codelineno-12-79" name="__codelineno-12-79" href="#__codelineno-12-79"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-80" name="__codelineno-12-80" href="#__codelineno-12-80"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-81" name="__codelineno-12-81" href="#__codelineno-12-81"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-82" name="__codelineno-12-82" href="#__codelineno-12-82"></a>
|
||||
<a id="__codelineno-12-83" name="__codelineno-12-83" href="#__codelineno-12-83"></a><span class="w"> </span><span class="c1">### 打印哈希表 ###</span>
|
||||
<a id="__codelineno-12-84" name="__codelineno-12-84" href="#__codelineno-12-84"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">print</span>
|
||||
<a id="__codelineno-12-85" name="__codelineno-12-85" href="#__codelineno-12-85"></a><span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="n">bucket</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="vi">@buckets</span>
|
||||
<a id="__codelineno-12-86" name="__codelineno-12-86" href="#__codelineno-12-86"></a><span class="w"> </span><span class="n">res</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="o">[]</span>
|
||||
<a id="__codelineno-12-87" name="__codelineno-12-87" href="#__codelineno-12-87"></a><span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="n">bucket</span>
|
||||
<a id="__codelineno-12-88" name="__codelineno-12-88" href="#__codelineno-12-88"></a><span class="w"> </span><span class="n">res</span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="s2">"</span><span class="si">#{</span><span class="n">pair</span><span class="o">.</span><span class="n">key</span><span class="si">}</span><span class="s2"> -> </span><span class="si">#{</span><span class="n">pair</span><span class="o">.</span><span class="n">val</span><span class="si">}</span><span class="s2">"</span>
|
||||
<a id="__codelineno-12-89" name="__codelineno-12-89" href="#__codelineno-12-89"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-90" name="__codelineno-12-90" href="#__codelineno-12-90"></a><span class="w"> </span><span class="n">pp</span><span class="w"> </span><span class="n">res</span>
|
||||
<a id="__codelineno-12-91" name="__codelineno-12-91" href="#__codelineno-12-91"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-92" name="__codelineno-12-92" href="#__codelineno-12-92"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-93" name="__codelineno-12-93" href="#__codelineno-12-93"></a><span class="k">end</span>
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
@ -6763,7 +6855,118 @@
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
<div class="highlight"><span class="filename">hash_map_open_addressing.rb</span><pre><span></span><code><a id="__codelineno-26-1" name="__codelineno-26-1" href="#__codelineno-26-1"></a><span class="o">[</span><span class="n">class</span><span class="o">]</span><span class="p">{</span><span class="no">HashMapOpenAddressing</span><span class="p">}</span><span class="o">-[</span><span class="n">func</span><span class="o">]</span><span class="p">{}</span>
|
||||
<div class="highlight"><span class="filename">hash_map_open_addressing.rb</span><pre><span></span><code><a id="__codelineno-26-1" name="__codelineno-26-1" href="#__codelineno-26-1"></a><span class="c1">### 开放寻址哈希表 ###</span>
|
||||
<a id="__codelineno-26-2" name="__codelineno-26-2" href="#__codelineno-26-2"></a><span class="k">class</span><span class="w"> </span><span class="nc">HashMapOpenAddressing</span>
|
||||
<a id="__codelineno-26-3" name="__codelineno-26-3" href="#__codelineno-26-3"></a><span class="w"> </span><span class="no">TOMBSTONE</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="no">Pair</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="o">-</span><span class="mi">1</span><span class="p">,</span><span class="w"> </span><span class="s1">'-1'</span><span class="p">)</span><span class="w"> </span><span class="c1"># 删除标记</span>
|
||||
<a id="__codelineno-26-4" name="__codelineno-26-4" href="#__codelineno-26-4"></a>
|
||||
<a id="__codelineno-26-5" name="__codelineno-26-5" href="#__codelineno-26-5"></a><span class="w"> </span><span class="c1">### 构造方法 ###</span>
|
||||
<a id="__codelineno-26-6" name="__codelineno-26-6" href="#__codelineno-26-6"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">initialize</span>
|
||||
<a id="__codelineno-26-7" name="__codelineno-26-7" href="#__codelineno-26-7"></a><span class="w"> </span><span class="vi">@size</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span><span class="w"> </span><span class="c1"># 键值对数量</span>
|
||||
<a id="__codelineno-26-8" name="__codelineno-26-8" href="#__codelineno-26-8"></a><span class="w"> </span><span class="vi">@capacity</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">4</span><span class="w"> </span><span class="c1"># 哈希表容量</span>
|
||||
<a id="__codelineno-26-9" name="__codelineno-26-9" href="#__codelineno-26-9"></a><span class="w"> </span><span class="vi">@load_thres</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">2</span><span class="o">.</span><span class="mi">0</span><span class="w"> </span><span class="o">/</span><span class="w"> </span><span class="mi">3</span><span class="o">.</span><span class="mi">0</span><span class="w"> </span><span class="c1"># 触发扩容的负载因子阈值</span>
|
||||
<a id="__codelineno-26-10" name="__codelineno-26-10" href="#__codelineno-26-10"></a><span class="w"> </span><span class="vi">@extend_ratio</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">2</span><span class="w"> </span><span class="c1"># 扩容倍数</span>
|
||||
<a id="__codelineno-26-11" name="__codelineno-26-11" href="#__codelineno-26-11"></a><span class="w"> </span><span class="vi">@buckets</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">Array</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="vi">@capacity</span><span class="p">)</span><span class="w"> </span><span class="c1"># 桶数组</span>
|
||||
<a id="__codelineno-26-12" name="__codelineno-26-12" href="#__codelineno-26-12"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-13" name="__codelineno-26-13" href="#__codelineno-26-13"></a>
|
||||
<a id="__codelineno-26-14" name="__codelineno-26-14" href="#__codelineno-26-14"></a><span class="w"> </span><span class="c1">### 哈希函数 ###</span>
|
||||
<a id="__codelineno-26-15" name="__codelineno-26-15" href="#__codelineno-26-15"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">hash_func</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-16" name="__codelineno-26-16" href="#__codelineno-26-16"></a><span class="w"> </span><span class="n">key</span><span class="w"> </span><span class="o">%</span><span class="w"> </span><span class="vi">@capacity</span>
|
||||
<a id="__codelineno-26-17" name="__codelineno-26-17" href="#__codelineno-26-17"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-18" name="__codelineno-26-18" href="#__codelineno-26-18"></a>
|
||||
<a id="__codelineno-26-19" name="__codelineno-26-19" href="#__codelineno-26-19"></a><span class="w"> </span><span class="c1">### 负载因子 ###</span>
|
||||
<a id="__codelineno-26-20" name="__codelineno-26-20" href="#__codelineno-26-20"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">load_factor</span>
|
||||
<a id="__codelineno-26-21" name="__codelineno-26-21" href="#__codelineno-26-21"></a><span class="w"> </span><span class="vi">@size</span><span class="w"> </span><span class="o">/</span><span class="w"> </span><span class="vi">@capacity</span>
|
||||
<a id="__codelineno-26-22" name="__codelineno-26-22" href="#__codelineno-26-22"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-23" name="__codelineno-26-23" href="#__codelineno-26-23"></a>
|
||||
<a id="__codelineno-26-24" name="__codelineno-26-24" href="#__codelineno-26-24"></a><span class="w"> </span><span class="c1">### 搜索 key 对应的桶索引 ###</span>
|
||||
<a id="__codelineno-26-25" name="__codelineno-26-25" href="#__codelineno-26-25"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">find_bucket</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-26" name="__codelineno-26-26" href="#__codelineno-26-26"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">hash_func</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-27" name="__codelineno-26-27" href="#__codelineno-26-27"></a><span class="w"> </span><span class="n">first_tombstone</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="o">-</span><span class="mi">1</span>
|
||||
<a id="__codelineno-26-28" name="__codelineno-26-28" href="#__codelineno-26-28"></a><span class="w"> </span><span class="c1"># 线性探测，当遇到空桶时跳出</span>
|
||||
<a id="__codelineno-26-29" name="__codelineno-26-29" href="#__codelineno-26-29"></a><span class="w"> </span><span class="k">while</span><span class="w"> </span><span class="o">!</span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">].</span><span class="n">nil?</span>
|
||||
<a id="__codelineno-26-30" name="__codelineno-26-30" href="#__codelineno-26-30"></a><span class="w"> </span><span class="c1"># 若遇到 key ，返回对应的桶索引</span>
|
||||
<a id="__codelineno-26-31" name="__codelineno-26-31" href="#__codelineno-26-31"></a><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">].</span><span class="n">key</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="n">key</span>
|
||||
<a id="__codelineno-26-32" name="__codelineno-26-32" href="#__codelineno-26-32"></a><span class="w"> </span><span class="c1"># 若之前遇到了删除标记，则将键值对移动至该索引处</span>
|
||||
<a id="__codelineno-26-33" name="__codelineno-26-33" href="#__codelineno-26-33"></a><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="n">first_tombstone</span><span class="w"> </span><span class="o">!=</span><span class="w"> </span><span class="o">-</span><span class="mi">1</span>
|
||||
<a id="__codelineno-26-34" name="__codelineno-26-34" href="#__codelineno-26-34"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">first_tombstone</span><span class="o">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span>
|
||||
<a id="__codelineno-26-35" name="__codelineno-26-35" href="#__codelineno-26-35"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="no">TOMBSTONE</span>
|
||||
<a id="__codelineno-26-36" name="__codelineno-26-36" href="#__codelineno-26-36"></a><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">first_tombstone</span><span class="w"> </span><span class="c1"># 返回移动后的桶索引</span>
|
||||
<a id="__codelineno-26-37" name="__codelineno-26-37" href="#__codelineno-26-37"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-38" name="__codelineno-26-38" href="#__codelineno-26-38"></a><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="c1"># 返回桶索引</span>
|
||||
<a id="__codelineno-26-39" name="__codelineno-26-39" href="#__codelineno-26-39"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-40" name="__codelineno-26-40" href="#__codelineno-26-40"></a><span class="w"> </span><span class="c1"># 记录遇到的首个删除标记</span>
|
||||
<a id="__codelineno-26-41" name="__codelineno-26-41" href="#__codelineno-26-41"></a><span class="w"> </span><span class="n">first_tombstone</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="n">first_tombstone</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="o">-</span><span class="mi">1</span><span class="w"> </span><span class="o">&&</span><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="no">TOMBSTONE</span>
|
||||
<a id="__codelineno-26-42" name="__codelineno-26-42" href="#__codelineno-26-42"></a><span class="w"> </span><span class="c1"># 计算桶索引，越过尾部则返回头部</span>
|
||||
<a id="__codelineno-26-43" name="__codelineno-26-43" href="#__codelineno-26-43"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="n">index</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="mi">1</span><span class="p">)</span><span class="w"> </span><span class="o">%</span><span class="w"> </span><span class="vi">@capacity</span>
|
||||
<a id="__codelineno-26-44" name="__codelineno-26-44" href="#__codelineno-26-44"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-45" name="__codelineno-26-45" href="#__codelineno-26-45"></a><span class="w"> </span><span class="c1"># 若 key 不存在，则返回添加点的索引</span>
|
||||
<a id="__codelineno-26-46" name="__codelineno-26-46" href="#__codelineno-26-46"></a><span class="w"> </span><span class="n">first_tombstone</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="o">-</span><span class="mi">1</span><span class="w"> </span><span class="o">?</span><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="p">:</span><span class="w"> </span><span class="n">first_tombstone</span>
|
||||
<a id="__codelineno-26-47" name="__codelineno-26-47" href="#__codelineno-26-47"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-48" name="__codelineno-26-48" href="#__codelineno-26-48"></a>
|
||||
<a id="__codelineno-26-49" name="__codelineno-26-49" href="#__codelineno-26-49"></a><span class="w"> </span><span class="c1">### 查询操作 ###</span>
|
||||
<a id="__codelineno-26-50" name="__codelineno-26-50" href="#__codelineno-26-50"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">get</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-51" name="__codelineno-26-51" href="#__codelineno-26-51"></a><span class="w"> </span><span class="c1"># 搜索 key 对应的桶索引</span>
|
||||
<a id="__codelineno-26-52" name="__codelineno-26-52" href="#__codelineno-26-52"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">find_bucket</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-53" name="__codelineno-26-53" href="#__codelineno-26-53"></a><span class="w"> </span><span class="c1"># 若找到键值对，则返回对应 val</span>
|
||||
<a id="__codelineno-26-54" name="__codelineno-26-54" href="#__codelineno-26-54"></a><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">].</span><span class="n">val</span><span class="w"> </span><span class="k">unless</span><span class="w"> </span><span class="o">[</span><span class="kp">nil</span><span class="p">,</span><span class="w"> </span><span class="no">TOMBSTONE</span><span class="o">].</span><span class="n">include?</span><span class="p">(</span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-55" name="__codelineno-26-55" href="#__codelineno-26-55"></a><span class="w"> </span><span class="c1"># 若键值对不存在，则返回 nil</span>
|
||||
<a id="__codelineno-26-56" name="__codelineno-26-56" href="#__codelineno-26-56"></a><span class="w"> </span><span class="kp">nil</span>
|
||||
<a id="__codelineno-26-57" name="__codelineno-26-57" href="#__codelineno-26-57"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-58" name="__codelineno-26-58" href="#__codelineno-26-58"></a>
|
||||
<a id="__codelineno-26-59" name="__codelineno-26-59" href="#__codelineno-26-59"></a><span class="w"> </span><span class="c1">### 添加操作 ###</span>
|
||||
<a id="__codelineno-26-60" name="__codelineno-26-60" href="#__codelineno-26-60"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">put</span><span class="p">(</span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">val</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-61" name="__codelineno-26-61" href="#__codelineno-26-61"></a><span class="w"> </span><span class="c1"># 当负载因子超过阈值时，执行扩容</span>
|
||||
<a id="__codelineno-26-62" name="__codelineno-26-62" href="#__codelineno-26-62"></a><span class="w"> </span><span class="kp">extend</span><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="n">load_factor</span><span class="w"> </span><span class="o">></span><span class="w"> </span><span class="vi">@load_thres</span>
|
||||
<a id="__codelineno-26-63" name="__codelineno-26-63" href="#__codelineno-26-63"></a><span class="w"> </span><span class="c1"># 搜索 key 对应的桶索引</span>
|
||||
<a id="__codelineno-26-64" name="__codelineno-26-64" href="#__codelineno-26-64"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">find_bucket</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-65" name="__codelineno-26-65" href="#__codelineno-26-65"></a><span class="w"> </span><span class="c1"># 若找到键值对，则覆盖 val 开返回</span>
|
||||
<a id="__codelineno-26-66" name="__codelineno-26-66" href="#__codelineno-26-66"></a><span class="w"> </span><span class="k">unless</span><span class="w"> </span><span class="o">[</span><span class="kp">nil</span><span class="p">,</span><span class="w"> </span><span class="no">TOMBSTONE</span><span class="o">].</span><span class="n">include?</span><span class="p">(</span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-67" name="__codelineno-26-67" href="#__codelineno-26-67"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">].</span><span class="n">val</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">val</span>
|
||||
<a id="__codelineno-26-68" name="__codelineno-26-68" href="#__codelineno-26-68"></a><span class="w"> </span><span class="k">return</span>
|
||||
<a id="__codelineno-26-69" name="__codelineno-26-69" href="#__codelineno-26-69"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-70" name="__codelineno-26-70" href="#__codelineno-26-70"></a><span class="w"> </span><span class="c1"># 若键值对不存在，则添加该键值对</span>
|
||||
<a id="__codelineno-26-71" name="__codelineno-26-71" href="#__codelineno-26-71"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="no">Pair</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">val</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-72" name="__codelineno-26-72" href="#__codelineno-26-72"></a><span class="w"> </span><span class="vi">@size</span><span class="w"> </span><span class="o">+=</span><span class="w"> </span><span class="mi">1</span>
|
||||
<a id="__codelineno-26-73" name="__codelineno-26-73" href="#__codelineno-26-73"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-74" name="__codelineno-26-74" href="#__codelineno-26-74"></a>
|
||||
<a id="__codelineno-26-75" name="__codelineno-26-75" href="#__codelineno-26-75"></a><span class="w"> </span><span class="c1">### 删除操作 ###</span>
|
||||
<a id="__codelineno-26-76" name="__codelineno-26-76" href="#__codelineno-26-76"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">remove</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-77" name="__codelineno-26-77" href="#__codelineno-26-77"></a><span class="w"> </span><span class="c1"># 搜索 key 对应的桶索引</span>
|
||||
<a id="__codelineno-26-78" name="__codelineno-26-78" href="#__codelineno-26-78"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">find_bucket</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-79" name="__codelineno-26-79" href="#__codelineno-26-79"></a><span class="w"> </span><span class="c1"># 若找到键值对，则用删除标记覆盖它</span>
|
||||
<a id="__codelineno-26-80" name="__codelineno-26-80" href="#__codelineno-26-80"></a><span class="w"> </span><span class="k">unless</span><span class="w"> </span><span class="o">[</span><span class="kp">nil</span><span class="p">,</span><span class="w"> </span><span class="no">TOMBSTONE</span><span class="o">].</span><span class="n">include?</span><span class="p">(</span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-81" name="__codelineno-26-81" href="#__codelineno-26-81"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="no">TOMBSTONE</span>
|
||||
<a id="__codelineno-26-82" name="__codelineno-26-82" href="#__codelineno-26-82"></a><span class="w"> </span><span class="vi">@size</span><span class="w"> </span><span class="o">-=</span><span class="w"> </span><span class="mi">1</span>
|
||||
<a id="__codelineno-26-83" name="__codelineno-26-83" href="#__codelineno-26-83"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-84" name="__codelineno-26-84" href="#__codelineno-26-84"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-85" name="__codelineno-26-85" href="#__codelineno-26-85"></a>
|
||||
<a id="__codelineno-26-86" name="__codelineno-26-86" href="#__codelineno-26-86"></a><span class="w"> </span><span class="c1">### 扩容哈希表 ###</span>
|
||||
<a id="__codelineno-26-87" name="__codelineno-26-87" href="#__codelineno-26-87"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">extend</span>
|
||||
<a id="__codelineno-26-88" name="__codelineno-26-88" href="#__codelineno-26-88"></a><span class="w"> </span><span class="c1"># 暂存原哈希表</span>
|
||||
<a id="__codelineno-26-89" name="__codelineno-26-89" href="#__codelineno-26-89"></a><span class="w"> </span><span class="n">buckets_tmp</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="vi">@buckets</span>
|
||||
<a id="__codelineno-26-90" name="__codelineno-26-90" href="#__codelineno-26-90"></a><span class="w"> </span><span class="c1"># 初始化扩容后的新哈希表</span>
|
||||
<a id="__codelineno-26-91" name="__codelineno-26-91" href="#__codelineno-26-91"></a><span class="w"> </span><span class="vi">@capacity</span><span class="w"> </span><span class="o">*=</span><span class="w"> </span><span class="vi">@extend_ratio</span>
|
||||
<a id="__codelineno-26-92" name="__codelineno-26-92" href="#__codelineno-26-92"></a><span class="w"> </span><span class="vi">@buckets</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">Array</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="vi">@capacity</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-93" name="__codelineno-26-93" href="#__codelineno-26-93"></a><span class="w"> </span><span class="vi">@size</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span>
|
||||
<a id="__codelineno-26-94" name="__codelineno-26-94" href="#__codelineno-26-94"></a><span class="w"> </span><span class="c1"># 将键值对从原哈希表搬运至新哈希表</span>
|
||||
<a id="__codelineno-26-95" name="__codelineno-26-95" href="#__codelineno-26-95"></a><span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="n">buckets_tmp</span>
|
||||
<a id="__codelineno-26-96" name="__codelineno-26-96" href="#__codelineno-26-96"></a><span class="w"> </span><span class="n">put</span><span class="p">(</span><span class="n">pair</span><span class="o">.</span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">val</span><span class="p">)</span><span class="w"> </span><span class="k">unless</span><span class="w"> </span><span class="o">[</span><span class="kp">nil</span><span class="p">,</span><span class="w"> </span><span class="no">TOMBSTONE</span><span class="o">].</span><span class="n">include?</span><span class="p">(</span><span class="n">pair</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-97" name="__codelineno-26-97" href="#__codelineno-26-97"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-98" name="__codelineno-26-98" href="#__codelineno-26-98"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-99" name="__codelineno-26-99" href="#__codelineno-26-99"></a>
|
||||
<a id="__codelineno-26-100" name="__codelineno-26-100" href="#__codelineno-26-100"></a><span class="w"> </span><span class="c1">### 打印哈希表 ###</span>
|
||||
<a id="__codelineno-26-101" name="__codelineno-26-101" href="#__codelineno-26-101"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">print</span>
|
||||
<a id="__codelineno-26-102" name="__codelineno-26-102" href="#__codelineno-26-102"></a><span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="vi">@buckets</span>
|
||||
<a id="__codelineno-26-103" name="__codelineno-26-103" href="#__codelineno-26-103"></a><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">nil?</span>
|
||||
<a id="__codelineno-26-104" name="__codelineno-26-104" href="#__codelineno-26-104"></a><span class="w"> </span><span class="nb">puts</span><span class="w"> </span><span class="s2">"Nil"</span>
|
||||
<a id="__codelineno-26-105" name="__codelineno-26-105" href="#__codelineno-26-105"></a><span class="w"> </span><span class="k">elsif</span><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="no">TOMBSTONE</span>
|
||||
<a id="__codelineno-26-106" name="__codelineno-26-106" href="#__codelineno-26-106"></a><span class="w"> </span><span class="nb">puts</span><span class="w"> </span><span class="s2">"TOMBSTONE"</span>
|
||||
<a id="__codelineno-26-107" name="__codelineno-26-107" href="#__codelineno-26-107"></a><span class="w"> </span><span class="k">else</span>
|
||||
<a id="__codelineno-26-108" name="__codelineno-26-108" href="#__codelineno-26-108"></a><span class="w"> </span><span class="nb">puts</span><span class="w"> </span><span class="s2">"</span><span class="si">#{</span><span class="n">pair</span><span class="o">.</span><span class="n">key</span><span class="si">}</span><span class="s2"> -> </span><span class="si">#{</span><span class="n">pair</span><span class="o">.</span><span class="n">val</span><span class="si">}</span><span class="s2">"</span>
|
||||
<a id="__codelineno-26-109" name="__codelineno-26-109" href="#__codelineno-26-109"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-110" name="__codelineno-26-110" href="#__codelineno-26-110"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-111" name="__codelineno-26-111" href="#__codelineno-26-111"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-112" name="__codelineno-26-112" href="#__codelineno-26-112"></a><span class="k">end</span>
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
|
||||
@ -3780,9 +3780,9 @@
|
||||
<a id="__codelineno-2-3" name="__codelineno-2-3" href="#__codelineno-2-3"></a>
|
||||
<a id="__codelineno-2-4" name="__codelineno-2-4" href="#__codelineno-2-4"></a><span class="cm">/* 添加操作 */</span>
|
||||
<a id="__codelineno-2-5" name="__codelineno-2-5" href="#__codelineno-2-5"></a><span class="c1">// 在哈希表中添加键值对 (key, value)</span>
|
||||
<a id="__codelineno-2-6" name="__codelineno-2-6" href="#__codelineno-2-6"></a><span class="n">map</span><span class="p">.</span><span class="na">put</span><span class="p">(</span><span class="mi">12836</span><span class="p">,</span><span class="w"> </span><span class="s">"小哈"</span><span class="p">);</span><span class="w"> </span>
|
||||
<a id="__codelineno-2-7" name="__codelineno-2-7" href="#__codelineno-2-7"></a><span class="n">map</span><span class="p">.</span><span class="na">put</span><span class="p">(</span><span class="mi">15937</span><span class="p">,</span><span class="w"> </span><span class="s">"小啰"</span><span class="p">);</span><span class="w"> </span>
|
||||
<a id="__codelineno-2-8" name="__codelineno-2-8" href="#__codelineno-2-8"></a><span class="n">map</span><span class="p">.</span><span class="na">put</span><span class="p">(</span><span class="mi">16750</span><span class="p">,</span><span class="w"> </span><span class="s">"小算"</span><span class="p">);</span><span class="w"> </span>
|
||||
<a id="__codelineno-2-6" name="__codelineno-2-6" href="#__codelineno-2-6"></a><span class="n">map</span><span class="p">.</span><span class="na">put</span><span class="p">(</span><span class="mi">12836</span><span class="p">,</span><span class="w"> </span><span class="s">"小哈"</span><span class="p">);</span>
|
||||
<a id="__codelineno-2-7" name="__codelineno-2-7" href="#__codelineno-2-7"></a><span class="n">map</span><span class="p">.</span><span class="na">put</span><span class="p">(</span><span class="mi">15937</span><span class="p">,</span><span class="w"> </span><span class="s">"小啰"</span><span class="p">);</span>
|
||||
<a id="__codelineno-2-8" name="__codelineno-2-8" href="#__codelineno-2-8"></a><span class="n">map</span><span class="p">.</span><span class="na">put</span><span class="p">(</span><span class="mi">16750</span><span class="p">,</span><span class="w"> </span><span class="s">"小算"</span><span class="p">);</span>
|
||||
<a id="__codelineno-2-9" name="__codelineno-2-9" href="#__codelineno-2-9"></a><span class="n">map</span><span class="p">.</span><span class="na">put</span><span class="p">(</span><span class="mi">13276</span><span class="p">,</span><span class="w"> </span><span class="s">"小法"</span><span class="p">);</span>
|
||||
<a id="__codelineno-2-10" name="__codelineno-2-10" href="#__codelineno-2-10"></a><span class="n">map</span><span class="p">.</span><span class="na">put</span><span class="p">(</span><span class="mi">10583</span><span class="p">,</span><span class="w"> </span><span class="s">"小鸭"</span><span class="p">);</span>
|
||||
<a id="__codelineno-2-11" name="__codelineno-2-11" href="#__codelineno-2-11"></a>
|
||||
@ -3973,7 +3973,24 @@
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
<div class="highlight"><span class="filename">hash_map.rb</span><pre><span></span><code><a id="__codelineno-12-1" name="__codelineno-12-1" href="#__codelineno-12-1"></a>
|
||||
<div class="highlight"><span class="filename">hash_map.rb</span><pre><span></span><code><a id="__codelineno-12-1" name="__codelineno-12-1" href="#__codelineno-12-1"></a><span class="c1"># 初始化哈希表</span>
|
||||
<a id="__codelineno-12-2" name="__codelineno-12-2" href="#__codelineno-12-2"></a><span class="n">hmap</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">{}</span>
|
||||
<a id="__codelineno-12-3" name="__codelineno-12-3" href="#__codelineno-12-3"></a>
|
||||
<a id="__codelineno-12-4" name="__codelineno-12-4" href="#__codelineno-12-4"></a><span class="c1"># 添加操作</span>
|
||||
<a id="__codelineno-12-5" name="__codelineno-12-5" href="#__codelineno-12-5"></a><span class="c1"># 在哈希表中添加键值对 (key, value)</span>
|
||||
<a id="__codelineno-12-6" name="__codelineno-12-6" href="#__codelineno-12-6"></a><span class="n">hmap</span><span class="o">[</span><span class="mi">12836</span><span class="o">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">"小哈"</span>
|
||||
<a id="__codelineno-12-7" name="__codelineno-12-7" href="#__codelineno-12-7"></a><span class="n">hmap</span><span class="o">[</span><span class="mi">15937</span><span class="o">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">"小啰"</span>
|
||||
<a id="__codelineno-12-8" name="__codelineno-12-8" href="#__codelineno-12-8"></a><span class="n">hmap</span><span class="o">[</span><span class="mi">16750</span><span class="o">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">"小算"</span>
|
||||
<a id="__codelineno-12-9" name="__codelineno-12-9" href="#__codelineno-12-9"></a><span class="n">hmap</span><span class="o">[</span><span class="mi">13276</span><span class="o">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">"小法"</span>
|
||||
<a id="__codelineno-12-10" name="__codelineno-12-10" href="#__codelineno-12-10"></a><span class="n">hmap</span><span class="o">[</span><span class="mi">10583</span><span class="o">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">"小鸭"</span>
|
||||
<a id="__codelineno-12-11" name="__codelineno-12-11" href="#__codelineno-12-11"></a>
|
||||
<a id="__codelineno-12-12" name="__codelineno-12-12" href="#__codelineno-12-12"></a><span class="c1"># 查询操作</span>
|
||||
<a id="__codelineno-12-13" name="__codelineno-12-13" href="#__codelineno-12-13"></a><span class="c1"># 向哈希表中输入键 key ，得到值 value</span>
|
||||
<a id="__codelineno-12-14" name="__codelineno-12-14" href="#__codelineno-12-14"></a><span class="nb">name</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">hmap</span><span class="o">[</span><span class="mi">15937</span><span class="o">]</span>
|
||||
<a id="__codelineno-12-15" name="__codelineno-12-15" href="#__codelineno-12-15"></a>
|
||||
<a id="__codelineno-12-16" name="__codelineno-12-16" href="#__codelineno-12-16"></a><span class="c1"># 删除操作</span>
|
||||
<a id="__codelineno-12-17" name="__codelineno-12-17" href="#__codelineno-12-17"></a><span class="c1"># 在哈希表中删除键值对 (key, value)</span>
|
||||
<a id="__codelineno-12-18" name="__codelineno-12-18" href="#__codelineno-12-18"></a><span class="n">hmap</span><span class="o">.</span><span class="n">delete</span><span class="p">(</span><span class="mi">10583</span><span class="p">)</span>
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
@ -4138,7 +4155,7 @@
|
||||
<a id="__codelineno-23-6" name="__codelineno-23-6" href="#__codelineno-23-6"></a>
|
||||
<a id="__codelineno-23-7" name="__codelineno-23-7" href="#__codelineno-23-7"></a><span class="c1">// 单独遍历键 Key</span>
|
||||
<a id="__codelineno-23-8" name="__codelineno-23-8" href="#__codelineno-23-8"></a><span class="k">for</span><span class="w"> </span><span class="n">key</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="n">map</span><span class="p">.</span><span class="n">keys</span><span class="p">()</span><span class="w"> </span><span class="p">{</span>
|
||||
<a id="__codelineno-23-9" name="__codelineno-23-9" href="#__codelineno-23-9"></a><span class="w"> </span><span class="fm">println!</span><span class="p">(</span><span class="s">"{key}"</span><span class="p">);</span><span class="w"> </span>
|
||||
<a id="__codelineno-23-9" name="__codelineno-23-9" href="#__codelineno-23-9"></a><span class="w"> </span><span class="fm">println!</span><span class="p">(</span><span class="s">"{key}"</span><span class="p">);</span>
|
||||
<a id="__codelineno-23-10" name="__codelineno-23-10" href="#__codelineno-23-10"></a><span class="p">}</span>
|
||||
<a id="__codelineno-23-11" name="__codelineno-23-11" href="#__codelineno-23-11"></a>
|
||||
<a id="__codelineno-23-12" name="__codelineno-23-12" href="#__codelineno-23-12"></a><span class="c1">// 单独遍历值 Value</span>
|
||||
@ -4168,7 +4185,15 @@
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
<div class="highlight"><span class="filename">hash_map.rb</span><pre><span></span><code><a id="__codelineno-26-1" name="__codelineno-26-1" href="#__codelineno-26-1"></a>
|
||||
<div class="highlight"><span class="filename">hash_map.rb</span><pre><span></span><code><a id="__codelineno-26-1" name="__codelineno-26-1" href="#__codelineno-26-1"></a><span class="c1"># 遍历哈希表</span>
|
||||
<a id="__codelineno-26-2" name="__codelineno-26-2" href="#__codelineno-26-2"></a><span class="c1"># 遍历键值对 key->value</span>
|
||||
<a id="__codelineno-26-3" name="__codelineno-26-3" href="#__codelineno-26-3"></a><span class="n">hmap</span><span class="o">.</span><span class="n">entries</span><span class="o">.</span><span class="n">each</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">|</span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">value</span><span class="o">|</span><span class="w"> </span><span class="nb">puts</span><span class="w"> </span><span class="s2">"</span><span class="si">#{</span><span class="n">key</span><span class="si">}</span><span class="s2"> -> </span><span class="si">#{</span><span class="n">value</span><span class="si">}</span><span class="s2">"</span><span class="w"> </span><span class="p">}</span>
|
||||
<a id="__codelineno-26-4" name="__codelineno-26-4" href="#__codelineno-26-4"></a>
|
||||
<a id="__codelineno-26-5" name="__codelineno-26-5" href="#__codelineno-26-5"></a><span class="c1"># 单独遍历键 key</span>
|
||||
<a id="__codelineno-26-6" name="__codelineno-26-6" href="#__codelineno-26-6"></a><span class="n">hmap</span><span class="o">.</span><span class="n">keys</span><span class="o">.</span><span class="n">each</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">|</span><span class="n">key</span><span class="o">|</span><span class="w"> </span><span class="nb">puts</span><span class="w"> </span><span class="n">key</span><span class="w"> </span><span class="p">}</span>
|
||||
<a id="__codelineno-26-7" name="__codelineno-26-7" href="#__codelineno-26-7"></a>
|
||||
<a id="__codelineno-26-8" name="__codelineno-26-8" href="#__codelineno-26-8"></a><span class="c1"># 单独遍历值 value</span>
|
||||
<a id="__codelineno-26-9" name="__codelineno-26-9" href="#__codelineno-26-9"></a><span class="n">hmap</span><span class="o">.</span><span class="n">values</span><span class="o">.</span><span class="n">each</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">|</span><span class="n">val</span><span class="o">|</span><span class="w"> </span><span class="nb">puts</span><span class="w"> </span><span class="n">val</span><span class="w"> </span><span class="p">}</span>
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
@ -5278,9 +5303,78 @@
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
<div class="highlight"><span class="filename">array_hash_map.rb</span><pre><span></span><code><a id="__codelineno-41-1" name="__codelineno-41-1" href="#__codelineno-41-1"></a><span class="o">[</span><span class="n">class</span><span class="o">]</span><span class="p">{</span><span class="no">Pair</span><span class="p">}</span><span class="o">-[</span><span class="n">func</span><span class="o">]</span><span class="p">{}</span>
|
||||
<a id="__codelineno-41-2" name="__codelineno-41-2" href="#__codelineno-41-2"></a>
|
||||
<a id="__codelineno-41-3" name="__codelineno-41-3" href="#__codelineno-41-3"></a><span class="o">[</span><span class="n">class</span><span class="o">]</span><span class="p">{</span><span class="no">ArrayHashMap</span><span class="p">}</span><span class="o">-[</span><span class="n">func</span><span class="o">]</span><span class="p">{}</span>
|
||||
<div class="highlight"><span class="filename">array_hash_map.rb</span><pre><span></span><code><a id="__codelineno-41-1" name="__codelineno-41-1" href="#__codelineno-41-1"></a><span class="c1">### 键值对 ###</span>
|
||||
<a id="__codelineno-41-2" name="__codelineno-41-2" href="#__codelineno-41-2"></a><span class="k">class</span><span class="w"> </span><span class="nc">Pair</span>
|
||||
<a id="__codelineno-41-3" name="__codelineno-41-3" href="#__codelineno-41-3"></a><span class="w"> </span><span class="kp">attr_accessor</span><span class="w"> </span><span class="ss">:key</span><span class="p">,</span><span class="w"> </span><span class="ss">:val</span>
|
||||
<a id="__codelineno-41-4" name="__codelineno-41-4" href="#__codelineno-41-4"></a>
|
||||
<a id="__codelineno-41-5" name="__codelineno-41-5" href="#__codelineno-41-5"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">initialize</span><span class="p">(</span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">val</span><span class="p">)</span>
|
||||
<a id="__codelineno-41-6" name="__codelineno-41-6" href="#__codelineno-41-6"></a><span class="w"> </span><span class="vi">@key</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">key</span>
|
||||
<a id="__codelineno-41-7" name="__codelineno-41-7" href="#__codelineno-41-7"></a><span class="w"> </span><span class="vi">@val</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">val</span>
|
||||
<a id="__codelineno-41-8" name="__codelineno-41-8" href="#__codelineno-41-8"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-41-9" name="__codelineno-41-9" href="#__codelineno-41-9"></a><span class="k">end</span>
|
||||
<a id="__codelineno-41-10" name="__codelineno-41-10" href="#__codelineno-41-10"></a>
|
||||
<a id="__codelineno-41-11" name="__codelineno-41-11" href="#__codelineno-41-11"></a><span class="c1">### 基于数组实现的哈希表 ###</span>
|
||||
<a id="__codelineno-41-12" name="__codelineno-41-12" href="#__codelineno-41-12"></a><span class="k">class</span><span class="w"> </span><span class="nc">ArrayHashMap</span>
|
||||
<a id="__codelineno-41-13" name="__codelineno-41-13" href="#__codelineno-41-13"></a><span class="w"> </span><span class="c1">### 构造方法 ###</span>
|
||||
<a id="__codelineno-41-14" name="__codelineno-41-14" href="#__codelineno-41-14"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">initialize</span>
|
||||
<a id="__codelineno-41-15" name="__codelineno-41-15" href="#__codelineno-41-15"></a><span class="w"> </span><span class="c1"># 初始化数组，包含 100 个桶</span>
|
||||
<a id="__codelineno-41-16" name="__codelineno-41-16" href="#__codelineno-41-16"></a><span class="w"> </span><span class="vi">@buckets</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">Array</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="mi">100</span><span class="p">)</span>
|
||||
<a id="__codelineno-41-17" name="__codelineno-41-17" href="#__codelineno-41-17"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-41-18" name="__codelineno-41-18" href="#__codelineno-41-18"></a>
|
||||
<a id="__codelineno-41-19" name="__codelineno-41-19" href="#__codelineno-41-19"></a><span class="w"> </span><span class="c1">### 哈希函数 ###</span>
|
||||
<a id="__codelineno-41-20" name="__codelineno-41-20" href="#__codelineno-41-20"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">hash_func</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-41-21" name="__codelineno-41-21" href="#__codelineno-41-21"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">key</span><span class="w"> </span><span class="o">%</span><span class="w"> </span><span class="mi">100</span>
|
||||
<a id="__codelineno-41-22" name="__codelineno-41-22" href="#__codelineno-41-22"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-41-23" name="__codelineno-41-23" href="#__codelineno-41-23"></a>
|
||||
<a id="__codelineno-41-24" name="__codelineno-41-24" href="#__codelineno-41-24"></a><span class="w"> </span><span class="c1">### 查询操作 ###</span>
|
||||
<a id="__codelineno-41-25" name="__codelineno-41-25" href="#__codelineno-41-25"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">get</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-41-26" name="__codelineno-41-26" href="#__codelineno-41-26"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">hash_func</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-41-27" name="__codelineno-41-27" href="#__codelineno-41-27"></a><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span>
|
||||
<a id="__codelineno-41-28" name="__codelineno-41-28" href="#__codelineno-41-28"></a>
|
||||
<a id="__codelineno-41-29" name="__codelineno-41-29" href="#__codelineno-41-29"></a><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">nil?</span>
|
||||
<a id="__codelineno-41-30" name="__codelineno-41-30" href="#__codelineno-41-30"></a><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">val</span>
|
||||
<a id="__codelineno-41-31" name="__codelineno-41-31" href="#__codelineno-41-31"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-41-32" name="__codelineno-41-32" href="#__codelineno-41-32"></a>
|
||||
<a id="__codelineno-41-33" name="__codelineno-41-33" href="#__codelineno-41-33"></a><span class="w"> </span><span class="c1">### 添加操作 ###</span>
|
||||
<a id="__codelineno-41-34" name="__codelineno-41-34" href="#__codelineno-41-34"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">put</span><span class="p">(</span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">val</span><span class="p">)</span>
|
||||
<a id="__codelineno-41-35" name="__codelineno-41-35" href="#__codelineno-41-35"></a><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="no">Pair</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">val</span><span class="p">)</span>
|
||||
<a id="__codelineno-41-36" name="__codelineno-41-36" href="#__codelineno-41-36"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">hash_func</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-41-37" name="__codelineno-41-37" href="#__codelineno-41-37"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">pair</span>
|
||||
<a id="__codelineno-41-38" name="__codelineno-41-38" href="#__codelineno-41-38"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-41-39" name="__codelineno-41-39" href="#__codelineno-41-39"></a>
|
||||
<a id="__codelineno-41-40" name="__codelineno-41-40" href="#__codelineno-41-40"></a><span class="w"> </span><span class="c1">### 删除操作 ###</span>
|
||||
<a id="__codelineno-41-41" name="__codelineno-41-41" href="#__codelineno-41-41"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">remove</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-41-42" name="__codelineno-41-42" href="#__codelineno-41-42"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">hash_func</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-41-43" name="__codelineno-41-43" href="#__codelineno-41-43"></a><span class="w"> </span><span class="c1"># 置为 nil ，代表删除</span>
|
||||
<a id="__codelineno-41-44" name="__codelineno-41-44" href="#__codelineno-41-44"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="kp">nil</span>
|
||||
<a id="__codelineno-41-45" name="__codelineno-41-45" href="#__codelineno-41-45"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-41-46" name="__codelineno-41-46" href="#__codelineno-41-46"></a>
|
||||
<a id="__codelineno-41-47" name="__codelineno-41-47" href="#__codelineno-41-47"></a><span class="w"> </span><span class="c1">### 获取所有键值对 ###</span>
|
||||
<a id="__codelineno-41-48" name="__codelineno-41-48" href="#__codelineno-41-48"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">entry_set</span>
|
||||
<a id="__codelineno-41-49" name="__codelineno-41-49" href="#__codelineno-41-49"></a><span class="w"> </span><span class="n">result</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="o">[]</span>
|
||||
<a id="__codelineno-41-50" name="__codelineno-41-50" href="#__codelineno-41-50"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">.</span><span class="n">each</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">|</span><span class="n">pair</span><span class="o">|</span><span class="w"> </span><span class="n">result</span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="k">unless</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">nil?</span><span class="w"> </span><span class="p">}</span>
|
||||
<a id="__codelineno-41-51" name="__codelineno-41-51" href="#__codelineno-41-51"></a><span class="w"> </span><span class="n">result</span>
|
||||
<a id="__codelineno-41-52" name="__codelineno-41-52" href="#__codelineno-41-52"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-41-53" name="__codelineno-41-53" href="#__codelineno-41-53"></a>
|
||||
<a id="__codelineno-41-54" name="__codelineno-41-54" href="#__codelineno-41-54"></a><span class="w"> </span><span class="c1">### 获取所有键 ###</span>
|
||||
<a id="__codelineno-41-55" name="__codelineno-41-55" href="#__codelineno-41-55"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">key_set</span>
|
||||
<a id="__codelineno-41-56" name="__codelineno-41-56" href="#__codelineno-41-56"></a><span class="w"> </span><span class="n">result</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="o">[]</span>
|
||||
<a id="__codelineno-41-57" name="__codelineno-41-57" href="#__codelineno-41-57"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">.</span><span class="n">each</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">|</span><span class="n">pair</span><span class="o">|</span><span class="w"> </span><span class="n">result</span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">key</span><span class="w"> </span><span class="k">unless</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">nil?</span><span class="w"> </span><span class="p">}</span>
|
||||
<a id="__codelineno-41-58" name="__codelineno-41-58" href="#__codelineno-41-58"></a><span class="w"> </span><span class="n">result</span>
|
||||
<a id="__codelineno-41-59" name="__codelineno-41-59" href="#__codelineno-41-59"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-41-60" name="__codelineno-41-60" href="#__codelineno-41-60"></a>
|
||||
<a id="__codelineno-41-61" name="__codelineno-41-61" href="#__codelineno-41-61"></a><span class="w"> </span><span class="c1">### 获取所有值 ###</span>
|
||||
<a id="__codelineno-41-62" name="__codelineno-41-62" href="#__codelineno-41-62"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">value_set</span>
|
||||
<a id="__codelineno-41-63" name="__codelineno-41-63" href="#__codelineno-41-63"></a><span class="w"> </span><span class="n">result</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="o">[]</span>
|
||||
<a id="__codelineno-41-64" name="__codelineno-41-64" href="#__codelineno-41-64"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">.</span><span class="n">each</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">|</span><span class="n">pair</span><span class="o">|</span><span class="w"> </span><span class="n">result</span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">val</span><span class="w"> </span><span class="k">unless</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">nil?</span><span class="w"> </span><span class="p">}</span>
|
||||
<a id="__codelineno-41-65" name="__codelineno-41-65" href="#__codelineno-41-65"></a><span class="w"> </span><span class="n">result</span>
|
||||
<a id="__codelineno-41-66" name="__codelineno-41-66" href="#__codelineno-41-66"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-41-67" name="__codelineno-41-67" href="#__codelineno-41-67"></a>
|
||||
<a id="__codelineno-41-68" name="__codelineno-41-68" href="#__codelineno-41-68"></a><span class="w"> </span><span class="c1">### 打印哈希表 ###</span>
|
||||
<a id="__codelineno-41-69" name="__codelineno-41-69" href="#__codelineno-41-69"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">print</span>
|
||||
<a id="__codelineno-41-70" name="__codelineno-41-70" href="#__codelineno-41-70"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">.</span><span class="n">each</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">|</span><span class="n">pair</span><span class="o">|</span><span class="w"> </span><span class="nb">puts</span><span class="w"> </span><span class="s2">"</span><span class="si">#{</span><span class="n">pair</span><span class="o">.</span><span class="n">key</span><span class="si">}</span><span class="s2"> -> </span><span class="si">#{</span><span class="n">pair</span><span class="o">.</span><span class="n">val</span><span class="si">}</span><span class="s2">"</span><span class="w"> </span><span class="k">unless</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">nil?</span><span class="w"> </span><span class="p">}</span>
|
||||
<a id="__codelineno-41-71" name="__codelineno-41-71" href="#__codelineno-41-71"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-41-72" name="__codelineno-41-72" href="#__codelineno-41-72"></a><span class="k">end</span>
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
|
||||
@ -4186,7 +4186,7 @@
|
||||
<a id="__codelineno-14-22" name="__codelineno-14-22" href="#__codelineno-14-22"></a>
|
||||
<a id="__codelineno-14-23" name="__codelineno-14-23" href="#__codelineno-14-23"></a> <span class="k">def</span> <span class="nf">is_empty</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="nb">bool</span><span class="p">:</span>
|
||||
<a id="__codelineno-14-24" name="__codelineno-14-24" href="#__codelineno-14-24"></a><span class="w"> </span><span class="sd">"""判断双向队列是否为空"""</span>
|
||||
<a id="__codelineno-14-25" name="__codelineno-14-25" href="#__codelineno-14-25"></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">size</span><span class="p">()</span> <span class="o">==</span> <span class="mi">0</span>
|
||||
<a id="__codelineno-14-25" name="__codelineno-14-25" href="#__codelineno-14-25"></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_size</span> <span class="o">==</span> <span class="mi">0</span>
|
||||
<a id="__codelineno-14-26" name="__codelineno-14-26" href="#__codelineno-14-26"></a>
|
||||
<a id="__codelineno-14-27" name="__codelineno-14-27" href="#__codelineno-14-27"></a> <span class="k">def</span> <span class="nf">push</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">num</span><span class="p">:</span> <span class="nb">int</span><span class="p">,</span> <span class="n">is_front</span><span class="p">:</span> <span class="nb">bool</span><span class="p">):</span>
|
||||
<a id="__codelineno-14-28" name="__codelineno-14-28" href="#__codelineno-14-28"></a><span class="w"> </span><span class="sd">"""入队操作"""</span>
|
||||
|
||||
@ -4129,7 +4129,7 @@
|
||||
<a id="__codelineno-14-13" name="__codelineno-14-13" href="#__codelineno-14-13"></a>
|
||||
<a id="__codelineno-14-14" name="__codelineno-14-14" href="#__codelineno-14-14"></a> <span class="k">def</span> <span class="nf">is_empty</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="nb">bool</span><span class="p">:</span>
|
||||
<a id="__codelineno-14-15" name="__codelineno-14-15" href="#__codelineno-14-15"></a><span class="w"> </span><span class="sd">"""判断队列是否为空"""</span>
|
||||
<a id="__codelineno-14-16" name="__codelineno-14-16" href="#__codelineno-14-16"></a> <span class="k">return</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_front</span>
|
||||
<a id="__codelineno-14-16" name="__codelineno-14-16" href="#__codelineno-14-16"></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_size</span> <span class="o">==</span> <span class="mi">0</span>
|
||||
<a id="__codelineno-14-17" name="__codelineno-14-17" href="#__codelineno-14-17"></a>
|
||||
<a id="__codelineno-14-18" name="__codelineno-14-18" href="#__codelineno-14-18"></a> <span class="k">def</span> <span class="nf">push</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">num</span><span class="p">:</span> <span class="nb">int</span><span class="p">):</span>
|
||||
<a id="__codelineno-14-19" name="__codelineno-14-19" href="#__codelineno-14-19"></a><span class="w"> </span><span class="sd">"""入队"""</span>
|
||||
|
||||
@ -4140,7 +4140,7 @@
|
||||
<a id="__codelineno-14-12" name="__codelineno-14-12" href="#__codelineno-14-12"></a>
|
||||
<a id="__codelineno-14-13" name="__codelineno-14-13" href="#__codelineno-14-13"></a> <span class="k">def</span> <span class="nf">is_empty</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="nb">bool</span><span class="p">:</span>
|
||||
<a id="__codelineno-14-14" name="__codelineno-14-14" href="#__codelineno-14-14"></a><span class="w"> </span><span class="sd">"""判断栈是否为空"""</span>
|
||||
<a id="__codelineno-14-15" name="__codelineno-14-15" href="#__codelineno-14-15"></a> <span class="k">return</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_peek</span>
|
||||
<a id="__codelineno-14-15" name="__codelineno-14-15" href="#__codelineno-14-15"></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_size</span> <span class="o">==</span> <span class="mi">0</span>
|
||||
<a id="__codelineno-14-16" name="__codelineno-14-16" href="#__codelineno-14-16"></a>
|
||||
<a id="__codelineno-14-17" name="__codelineno-14-17" href="#__codelineno-14-17"></a> <span class="k">def</span> <span class="nf">push</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">val</span><span class="p">:</span> <span class="nb">int</span><span class="p">):</span>
|
||||
<a id="__codelineno-14-18" name="__codelineno-14-18" href="#__codelineno-14-18"></a><span class="w"> </span><span class="sd">"""入栈"""</span>
|
||||
@ -4989,7 +4989,7 @@
|
||||
<a id="__codelineno-28-11" name="__codelineno-28-11" href="#__codelineno-28-11"></a>
|
||||
<a id="__codelineno-28-12" name="__codelineno-28-12" href="#__codelineno-28-12"></a> <span class="k">def</span> <span class="nf">is_empty</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="nb">bool</span><span class="p">:</span>
|
||||
<a id="__codelineno-28-13" name="__codelineno-28-13" href="#__codelineno-28-13"></a><span class="w"> </span><span class="sd">"""判断栈是否为空"""</span>
|
||||
<a id="__codelineno-28-14" name="__codelineno-28-14" href="#__codelineno-28-14"></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_stack</span> <span class="o">==</span> <span class="p">[]</span>
|
||||
<a id="__codelineno-28-14" name="__codelineno-28-14" href="#__codelineno-28-14"></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_size</span> <span class="o">==</span> <span class="mi">0</span>
|
||||
<a id="__codelineno-28-15" name="__codelineno-28-15" href="#__codelineno-28-15"></a>
|
||||
<a id="__codelineno-28-16" name="__codelineno-28-16" href="#__codelineno-28-16"></a> <span class="k">def</span> <span class="nf">push</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">item</span><span class="p">:</span> <span class="nb">int</span><span class="p">):</span>
|
||||
<a id="__codelineno-28-17" name="__codelineno-28-17" href="#__codelineno-28-17"></a><span class="w"> </span><span class="sd">"""入栈"""</span>
|
||||
|
||||
@ -2071,7 +2071,7 @@
|
||||
<div class="admonition abstract">
|
||||
<p class="admonition-title">Abstract</p>
|
||||
<p>In the journey of life, we are like individual nodes, connected by countless invisible edges.</p>
|
||||
<p>Every encountering and parting leaves a unique mark on this vast network graph.</p>
|
||||
<p>Each encounter and parting leaves a distinctive imprint on this vast network graph.</p>
|
||||
</div>
|
||||
<h2 id="chapter-contents">Chapter contents<a class="headerlink" href="#chapter-contents" title="Permanent link">¶</a></h2>
|
||||
<ul>
|
||||
|
||||
@ -2714,13 +2714,45 @@
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
<div class="highlight"><span class="filename">simple_hash.rb</span><pre><span></span><code><a id="__codelineno-13-1" name="__codelineno-13-1" href="#__codelineno-13-1"></a><span class="o">[</span><span class="n">class</span><span class="o">]</span><span class="p">{}</span><span class="o">-[</span><span class="n">func</span><span class="o">]</span><span class="p">{</span><span class="n">add_hash</span><span class="p">}</span>
|
||||
<a id="__codelineno-13-2" name="__codelineno-13-2" href="#__codelineno-13-2"></a>
|
||||
<a id="__codelineno-13-3" name="__codelineno-13-3" href="#__codelineno-13-3"></a><span class="o">[</span><span class="n">class</span><span class="o">]</span><span class="p">{}</span><span class="o">-[</span><span class="n">func</span><span class="o">]</span><span class="p">{</span><span class="n">mul_hash</span><span class="p">}</span>
|
||||
<a id="__codelineno-13-4" name="__codelineno-13-4" href="#__codelineno-13-4"></a>
|
||||
<a id="__codelineno-13-5" name="__codelineno-13-5" href="#__codelineno-13-5"></a><span class="o">[</span><span class="n">class</span><span class="o">]</span><span class="p">{}</span><span class="o">-[</span><span class="n">func</span><span class="o">]</span><span class="p">{</span><span class="n">xor_hash</span><span class="p">}</span>
|
||||
<a id="__codelineno-13-6" name="__codelineno-13-6" href="#__codelineno-13-6"></a>
|
||||
<a id="__codelineno-13-7" name="__codelineno-13-7" href="#__codelineno-13-7"></a><span class="o">[</span><span class="n">class</span><span class="o">]</span><span class="p">{}</span><span class="o">-[</span><span class="n">func</span><span class="o">]</span><span class="p">{</span><span class="n">rot_hash</span><span class="p">}</span>
|
||||
<div class="highlight"><span class="filename">simple_hash.rb</span><pre><span></span><code><a id="__codelineno-13-1" name="__codelineno-13-1" href="#__codelineno-13-1"></a><span class="c1">### 加法哈希 ###</span>
|
||||
<a id="__codelineno-13-2" name="__codelineno-13-2" href="#__codelineno-13-2"></a><span class="k">def</span><span class="w"> </span><span class="nf">add_hash</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-13-3" name="__codelineno-13-3" href="#__codelineno-13-3"></a><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span>
|
||||
<a id="__codelineno-13-4" name="__codelineno-13-4" href="#__codelineno-13-4"></a><span class="w"> </span><span class="n">modulus</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">1_000_000_007</span>
|
||||
<a id="__codelineno-13-5" name="__codelineno-13-5" href="#__codelineno-13-5"></a>
|
||||
<a id="__codelineno-13-6" name="__codelineno-13-6" href="#__codelineno-13-6"></a><span class="w"> </span><span class="n">key</span><span class="o">.</span><span class="n">each_char</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">|</span><span class="n">c</span><span class="o">|</span><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">+=</span><span class="w"> </span><span class="n">c</span><span class="o">.</span><span class="n">ord</span><span class="w"> </span><span class="p">}</span>
|
||||
<a id="__codelineno-13-7" name="__codelineno-13-7" href="#__codelineno-13-7"></a>
|
||||
<a id="__codelineno-13-8" name="__codelineno-13-8" href="#__codelineno-13-8"></a><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">%</span><span class="w"> </span><span class="n">modulus</span>
|
||||
<a id="__codelineno-13-9" name="__codelineno-13-9" href="#__codelineno-13-9"></a><span class="k">end</span>
|
||||
<a id="__codelineno-13-10" name="__codelineno-13-10" href="#__codelineno-13-10"></a>
|
||||
<a id="__codelineno-13-11" name="__codelineno-13-11" href="#__codelineno-13-11"></a><span class="c1">### 乘法哈希 ###</span>
|
||||
<a id="__codelineno-13-12" name="__codelineno-13-12" href="#__codelineno-13-12"></a><span class="k">def</span><span class="w"> </span><span class="nf">mul_hash</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-13-13" name="__codelineno-13-13" href="#__codelineno-13-13"></a><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span>
|
||||
<a id="__codelineno-13-14" name="__codelineno-13-14" href="#__codelineno-13-14"></a><span class="w"> </span><span class="n">modulus</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">1_000_000_007</span>
|
||||
<a id="__codelineno-13-15" name="__codelineno-13-15" href="#__codelineno-13-15"></a>
|
||||
<a id="__codelineno-13-16" name="__codelineno-13-16" href="#__codelineno-13-16"></a><span class="w"> </span><span class="n">key</span><span class="o">.</span><span class="n">each_char</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">|</span><span class="n">c</span><span class="o">|</span><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">31</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">c</span><span class="o">.</span><span class="n">ord</span><span class="w"> </span><span class="p">}</span>
|
||||
<a id="__codelineno-13-17" name="__codelineno-13-17" href="#__codelineno-13-17"></a>
|
||||
<a id="__codelineno-13-18" name="__codelineno-13-18" href="#__codelineno-13-18"></a><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">%</span><span class="w"> </span><span class="n">modulus</span>
|
||||
<a id="__codelineno-13-19" name="__codelineno-13-19" href="#__codelineno-13-19"></a><span class="k">end</span>
|
||||
<a id="__codelineno-13-20" name="__codelineno-13-20" href="#__codelineno-13-20"></a>
|
||||
<a id="__codelineno-13-21" name="__codelineno-13-21" href="#__codelineno-13-21"></a><span class="c1">### 异或哈希 ###</span>
|
||||
<a id="__codelineno-13-22" name="__codelineno-13-22" href="#__codelineno-13-22"></a><span class="k">def</span><span class="w"> </span><span class="nf">xor_hash</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-13-23" name="__codelineno-13-23" href="#__codelineno-13-23"></a><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span>
|
||||
<a id="__codelineno-13-24" name="__codelineno-13-24" href="#__codelineno-13-24"></a><span class="w"> </span><span class="n">modulus</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">1_000_000_007</span>
|
||||
<a id="__codelineno-13-25" name="__codelineno-13-25" href="#__codelineno-13-25"></a>
|
||||
<a id="__codelineno-13-26" name="__codelineno-13-26" href="#__codelineno-13-26"></a><span class="w"> </span><span class="n">key</span><span class="o">.</span><span class="n">each_char</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">|</span><span class="n">c</span><span class="o">|</span><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">^=</span><span class="w"> </span><span class="n">c</span><span class="o">.</span><span class="n">ord</span><span class="w"> </span><span class="p">}</span>
|
||||
<a id="__codelineno-13-27" name="__codelineno-13-27" href="#__codelineno-13-27"></a>
|
||||
<a id="__codelineno-13-28" name="__codelineno-13-28" href="#__codelineno-13-28"></a><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">%</span><span class="w"> </span><span class="n">modulus</span>
|
||||
<a id="__codelineno-13-29" name="__codelineno-13-29" href="#__codelineno-13-29"></a><span class="k">end</span>
|
||||
<a id="__codelineno-13-30" name="__codelineno-13-30" href="#__codelineno-13-30"></a>
|
||||
<a id="__codelineno-13-31" name="__codelineno-13-31" href="#__codelineno-13-31"></a><span class="c1">### 旋转哈希 ###</span>
|
||||
<a id="__codelineno-13-32" name="__codelineno-13-32" href="#__codelineno-13-32"></a><span class="k">def</span><span class="w"> </span><span class="nf">rot_hash</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-13-33" name="__codelineno-13-33" href="#__codelineno-13-33"></a><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span>
|
||||
<a id="__codelineno-13-34" name="__codelineno-13-34" href="#__codelineno-13-34"></a><span class="w"> </span><span class="n">modulus</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">1_000_000_007</span>
|
||||
<a id="__codelineno-13-35" name="__codelineno-13-35" href="#__codelineno-13-35"></a>
|
||||
<a id="__codelineno-13-36" name="__codelineno-13-36" href="#__codelineno-13-36"></a><span class="w"> </span><span class="n">key</span><span class="o">.</span><span class="n">each_char</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">|</span><span class="n">c</span><span class="o">|</span><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="nb">hash</span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="mi">4</span><span class="p">)</span><span class="w"> </span><span class="o">^</span><span class="w"> </span><span class="p">(</span><span class="nb">hash</span><span class="w"> </span><span class="o">>></span><span class="w"> </span><span class="mi">28</span><span class="p">)</span><span class="w"> </span><span class="o">^</span><span class="w"> </span><span class="n">c</span><span class="o">.</span><span class="n">ord</span><span class="w"> </span><span class="p">}</span>
|
||||
<a id="__codelineno-13-37" name="__codelineno-13-37" href="#__codelineno-13-37"></a>
|
||||
<a id="__codelineno-13-38" name="__codelineno-13-38" href="#__codelineno-13-38"></a><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">%</span><span class="w"> </span><span class="n">modulus</span>
|
||||
<a id="__codelineno-13-39" name="__codelineno-13-39" href="#__codelineno-13-39"></a><span class="k">end</span>
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
|
||||
@ -3611,7 +3611,99 @@
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
<div class="highlight"><span class="filename">hash_map_chaining.rb</span><pre><span></span><code><a id="__codelineno-12-1" name="__codelineno-12-1" href="#__codelineno-12-1"></a><span class="o">[</span><span class="n">class</span><span class="o">]</span><span class="p">{</span><span class="no">HashMapChaining</span><span class="p">}</span><span class="o">-[</span><span class="n">func</span><span class="o">]</span><span class="p">{}</span>
|
||||
<div class="highlight"><span class="filename">hash_map_chaining.rb</span><pre><span></span><code><a id="__codelineno-12-1" name="__codelineno-12-1" href="#__codelineno-12-1"></a><span class="c1">### 键式地址哈希表 ###</span>
|
||||
<a id="__codelineno-12-2" name="__codelineno-12-2" href="#__codelineno-12-2"></a><span class="k">class</span><span class="w"> </span><span class="nc">HashMapChaining</span>
|
||||
<a id="__codelineno-12-3" name="__codelineno-12-3" href="#__codelineno-12-3"></a><span class="w"> </span><span class="c1">### 构造方法 ###</span>
|
||||
<a id="__codelineno-12-4" name="__codelineno-12-4" href="#__codelineno-12-4"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">initialize</span>
|
||||
<a id="__codelineno-12-5" name="__codelineno-12-5" href="#__codelineno-12-5"></a><span class="w"> </span><span class="vi">@size</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span><span class="w"> </span><span class="c1"># 键值对数量</span>
|
||||
<a id="__codelineno-12-6" name="__codelineno-12-6" href="#__codelineno-12-6"></a><span class="w"> </span><span class="vi">@capacity</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">4</span><span class="w"> </span><span class="c1"># 哈希表容量</span>
|
||||
<a id="__codelineno-12-7" name="__codelineno-12-7" href="#__codelineno-12-7"></a><span class="w"> </span><span class="vi">@load_thres</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">2</span><span class="o">.</span><span class="mi">0</span><span class="w"> </span><span class="o">/</span><span class="w"> </span><span class="mi">3</span><span class="o">.</span><span class="mi">0</span><span class="w"> </span><span class="c1"># 触发扩容的负载因子阈值</span>
|
||||
<a id="__codelineno-12-8" name="__codelineno-12-8" href="#__codelineno-12-8"></a><span class="w"> </span><span class="vi">@extend_ratio</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">2</span><span class="w"> </span><span class="c1"># 扩容倍数</span>
|
||||
<a id="__codelineno-12-9" name="__codelineno-12-9" href="#__codelineno-12-9"></a><span class="w"> </span><span class="vi">@buckets</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">Array</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="vi">@capacity</span><span class="p">)</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">[]</span><span class="w"> </span><span class="p">}</span><span class="w"> </span><span class="c1"># 桶数组</span>
|
||||
<a id="__codelineno-12-10" name="__codelineno-12-10" href="#__codelineno-12-10"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-11" name="__codelineno-12-11" href="#__codelineno-12-11"></a>
|
||||
<a id="__codelineno-12-12" name="__codelineno-12-12" href="#__codelineno-12-12"></a><span class="w"> </span><span class="c1">### 哈希函数 ###</span>
|
||||
<a id="__codelineno-12-13" name="__codelineno-12-13" href="#__codelineno-12-13"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">hash_func</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-12-14" name="__codelineno-12-14" href="#__codelineno-12-14"></a><span class="w"> </span><span class="n">key</span><span class="w"> </span><span class="o">%</span><span class="w"> </span><span class="vi">@capacity</span>
|
||||
<a id="__codelineno-12-15" name="__codelineno-12-15" href="#__codelineno-12-15"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-16" name="__codelineno-12-16" href="#__codelineno-12-16"></a>
|
||||
<a id="__codelineno-12-17" name="__codelineno-12-17" href="#__codelineno-12-17"></a><span class="w"> </span><span class="c1">### 负载因子 ###</span>
|
||||
<a id="__codelineno-12-18" name="__codelineno-12-18" href="#__codelineno-12-18"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">load_factor</span>
|
||||
<a id="__codelineno-12-19" name="__codelineno-12-19" href="#__codelineno-12-19"></a><span class="w"> </span><span class="vi">@size</span><span class="w"> </span><span class="o">/</span><span class="w"> </span><span class="vi">@capacity</span>
|
||||
<a id="__codelineno-12-20" name="__codelineno-12-20" href="#__codelineno-12-20"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-21" name="__codelineno-12-21" href="#__codelineno-12-21"></a>
|
||||
<a id="__codelineno-12-22" name="__codelineno-12-22" href="#__codelineno-12-22"></a><span class="w"> </span><span class="c1">### 查询操作 ###</span>
|
||||
<a id="__codelineno-12-23" name="__codelineno-12-23" href="#__codelineno-12-23"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">get</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-12-24" name="__codelineno-12-24" href="#__codelineno-12-24"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">hash_func</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-12-25" name="__codelineno-12-25" href="#__codelineno-12-25"></a><span class="w"> </span><span class="n">bucket</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span>
|
||||
<a id="__codelineno-12-26" name="__codelineno-12-26" href="#__codelineno-12-26"></a><span class="w"> </span><span class="c1"># 遍历桶，若找到 key ，则返回对应 val</span>
|
||||
<a id="__codelineno-12-27" name="__codelineno-12-27" href="#__codelineno-12-27"></a><span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="n">bucket</span>
|
||||
<a id="__codelineno-12-28" name="__codelineno-12-28" href="#__codelineno-12-28"></a><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">val</span><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">key</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="n">key</span>
|
||||
<a id="__codelineno-12-29" name="__codelineno-12-29" href="#__codelineno-12-29"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-30" name="__codelineno-12-30" href="#__codelineno-12-30"></a><span class="w"> </span><span class="c1"># 若未找到 key , 则返回 nil</span>
|
||||
<a id="__codelineno-12-31" name="__codelineno-12-31" href="#__codelineno-12-31"></a><span class="w"> </span><span class="kp">nil</span>
|
||||
<a id="__codelineno-12-32" name="__codelineno-12-32" href="#__codelineno-12-32"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-33" name="__codelineno-12-33" href="#__codelineno-12-33"></a>
|
||||
<a id="__codelineno-12-34" name="__codelineno-12-34" href="#__codelineno-12-34"></a><span class="w"> </span><span class="c1">### 添加操作 ###</span>
|
||||
<a id="__codelineno-12-35" name="__codelineno-12-35" href="#__codelineno-12-35"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">put</span><span class="p">(</span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">val</span><span class="p">)</span>
|
||||
<a id="__codelineno-12-36" name="__codelineno-12-36" href="#__codelineno-12-36"></a><span class="w"> </span><span class="c1"># 当负载因子超过阈值时，执行扩容</span>
|
||||
<a id="__codelineno-12-37" name="__codelineno-12-37" href="#__codelineno-12-37"></a><span class="w"> </span><span class="kp">extend</span><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="n">load_factor</span><span class="w"> </span><span class="o">></span><span class="w"> </span><span class="vi">@load_thres</span>
|
||||
<a id="__codelineno-12-38" name="__codelineno-12-38" href="#__codelineno-12-38"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">hash_func</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-12-39" name="__codelineno-12-39" href="#__codelineno-12-39"></a><span class="w"> </span><span class="n">bucket</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span>
|
||||
<a id="__codelineno-12-40" name="__codelineno-12-40" href="#__codelineno-12-40"></a><span class="w"> </span><span class="c1"># 遍历桶，若遇到指定 key ，则更新对应 val 并返回</span>
|
||||
<a id="__codelineno-12-41" name="__codelineno-12-41" href="#__codelineno-12-41"></a><span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="n">bucket</span>
|
||||
<a id="__codelineno-12-42" name="__codelineno-12-42" href="#__codelineno-12-42"></a><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">key</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="n">key</span>
|
||||
<a id="__codelineno-12-43" name="__codelineno-12-43" href="#__codelineno-12-43"></a><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">val</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">val</span>
|
||||
<a id="__codelineno-12-44" name="__codelineno-12-44" href="#__codelineno-12-44"></a><span class="w"> </span><span class="k">return</span>
|
||||
<a id="__codelineno-12-45" name="__codelineno-12-45" href="#__codelineno-12-45"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-46" name="__codelineno-12-46" href="#__codelineno-12-46"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-47" name="__codelineno-12-47" href="#__codelineno-12-47"></a><span class="w"> </span><span class="c1"># 若无该 key ，则将键值对添加至尾部</span>
|
||||
<a id="__codelineno-12-48" name="__codelineno-12-48" href="#__codelineno-12-48"></a><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="no">Pair</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">val</span><span class="p">)</span>
|
||||
<a id="__codelineno-12-49" name="__codelineno-12-49" href="#__codelineno-12-49"></a><span class="w"> </span><span class="n">bucket</span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="n">pair</span>
|
||||
<a id="__codelineno-12-50" name="__codelineno-12-50" href="#__codelineno-12-50"></a><span class="w"> </span><span class="vi">@size</span><span class="w"> </span><span class="o">+=</span><span class="w"> </span><span class="mi">1</span>
|
||||
<a id="__codelineno-12-51" name="__codelineno-12-51" href="#__codelineno-12-51"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-52" name="__codelineno-12-52" href="#__codelineno-12-52"></a>
|
||||
<a id="__codelineno-12-53" name="__codelineno-12-53" href="#__codelineno-12-53"></a><span class="w"> </span><span class="c1">### 删除操作 ###</span>
|
||||
<a id="__codelineno-12-54" name="__codelineno-12-54" href="#__codelineno-12-54"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">remove</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-12-55" name="__codelineno-12-55" href="#__codelineno-12-55"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">hash_func</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-12-56" name="__codelineno-12-56" href="#__codelineno-12-56"></a><span class="w"> </span><span class="n">bucket</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span>
|
||||
<a id="__codelineno-12-57" name="__codelineno-12-57" href="#__codelineno-12-57"></a><span class="w"> </span><span class="c1"># 遍历桶，从中删除键值对</span>
|
||||
<a id="__codelineno-12-58" name="__codelineno-12-58" href="#__codelineno-12-58"></a><span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="n">bucket</span>
|
||||
<a id="__codelineno-12-59" name="__codelineno-12-59" href="#__codelineno-12-59"></a><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">key</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="n">key</span>
|
||||
<a id="__codelineno-12-60" name="__codelineno-12-60" href="#__codelineno-12-60"></a><span class="w"> </span><span class="n">bucket</span><span class="o">.</span><span class="n">delete</span><span class="p">(</span><span class="n">pair</span><span class="p">)</span>
|
||||
<a id="__codelineno-12-61" name="__codelineno-12-61" href="#__codelineno-12-61"></a><span class="w"> </span><span class="vi">@size</span><span class="w"> </span><span class="o">-=</span><span class="w"> </span><span class="mi">1</span>
|
||||
<a id="__codelineno-12-62" name="__codelineno-12-62" href="#__codelineno-12-62"></a><span class="w"> </span><span class="k">break</span>
|
||||
<a id="__codelineno-12-63" name="__codelineno-12-63" href="#__codelineno-12-63"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-64" name="__codelineno-12-64" href="#__codelineno-12-64"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-65" name="__codelineno-12-65" href="#__codelineno-12-65"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-66" name="__codelineno-12-66" href="#__codelineno-12-66"></a>
|
||||
<a id="__codelineno-12-67" name="__codelineno-12-67" href="#__codelineno-12-67"></a><span class="w"> </span><span class="c1">### 扩容哈希表 ###</span>
|
||||
<a id="__codelineno-12-68" name="__codelineno-12-68" href="#__codelineno-12-68"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">extend</span>
|
||||
<a id="__codelineno-12-69" name="__codelineno-12-69" href="#__codelineno-12-69"></a><span class="w"> </span><span class="c1"># 暫存原哈希表</span>
|
||||
<a id="__codelineno-12-70" name="__codelineno-12-70" href="#__codelineno-12-70"></a><span class="w"> </span><span class="n">buckets</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="vi">@buckets</span>
|
||||
<a id="__codelineno-12-71" name="__codelineno-12-71" href="#__codelineno-12-71"></a><span class="w"> </span><span class="c1"># 初始化扩容后的新哈希表</span>
|
||||
<a id="__codelineno-12-72" name="__codelineno-12-72" href="#__codelineno-12-72"></a><span class="w"> </span><span class="vi">@capacity</span><span class="w"> </span><span class="o">*=</span><span class="w"> </span><span class="vi">@extend_ratio</span>
|
||||
<a id="__codelineno-12-73" name="__codelineno-12-73" href="#__codelineno-12-73"></a><span class="w"> </span><span class="vi">@buckets</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">Array</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="vi">@capacity</span><span class="p">)</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">[]</span><span class="w"> </span><span class="p">}</span>
|
||||
<a id="__codelineno-12-74" name="__codelineno-12-74" href="#__codelineno-12-74"></a><span class="w"> </span><span class="vi">@size</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span>
|
||||
<a id="__codelineno-12-75" name="__codelineno-12-75" href="#__codelineno-12-75"></a><span class="w"> </span><span class="c1"># 将键值对从原哈希表搬运至新哈希表</span>
|
||||
<a id="__codelineno-12-76" name="__codelineno-12-76" href="#__codelineno-12-76"></a><span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="n">bucket</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="n">buckets</span>
|
||||
<a id="__codelineno-12-77" name="__codelineno-12-77" href="#__codelineno-12-77"></a><span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="n">bucket</span>
|
||||
<a id="__codelineno-12-78" name="__codelineno-12-78" href="#__codelineno-12-78"></a><span class="w"> </span><span class="n">put</span><span class="p">(</span><span class="n">pair</span><span class="o">.</span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">val</span><span class="p">)</span>
|
||||
<a id="__codelineno-12-79" name="__codelineno-12-79" href="#__codelineno-12-79"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-80" name="__codelineno-12-80" href="#__codelineno-12-80"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-81" name="__codelineno-12-81" href="#__codelineno-12-81"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-82" name="__codelineno-12-82" href="#__codelineno-12-82"></a>
|
||||
<a id="__codelineno-12-83" name="__codelineno-12-83" href="#__codelineno-12-83"></a><span class="w"> </span><span class="c1">### 打印哈希表 ###</span>
|
||||
<a id="__codelineno-12-84" name="__codelineno-12-84" href="#__codelineno-12-84"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">print</span>
|
||||
<a id="__codelineno-12-85" name="__codelineno-12-85" href="#__codelineno-12-85"></a><span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="n">bucket</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="vi">@buckets</span>
|
||||
<a id="__codelineno-12-86" name="__codelineno-12-86" href="#__codelineno-12-86"></a><span class="w"> </span><span class="n">res</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="o">[]</span>
|
||||
<a id="__codelineno-12-87" name="__codelineno-12-87" href="#__codelineno-12-87"></a><span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="n">bucket</span>
|
||||
<a id="__codelineno-12-88" name="__codelineno-12-88" href="#__codelineno-12-88"></a><span class="w"> </span><span class="n">res</span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="s2">"</span><span class="si">#{</span><span class="n">pair</span><span class="o">.</span><span class="n">key</span><span class="si">}</span><span class="s2"> -> </span><span class="si">#{</span><span class="n">pair</span><span class="o">.</span><span class="n">val</span><span class="si">}</span><span class="s2">"</span>
|
||||
<a id="__codelineno-12-89" name="__codelineno-12-89" href="#__codelineno-12-89"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-90" name="__codelineno-12-90" href="#__codelineno-12-90"></a><span class="w"> </span><span class="n">pp</span><span class="w"> </span><span class="n">res</span>
|
||||
<a id="__codelineno-12-91" name="__codelineno-12-91" href="#__codelineno-12-91"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-92" name="__codelineno-12-92" href="#__codelineno-12-92"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-93" name="__codelineno-12-93" href="#__codelineno-12-93"></a><span class="k">end</span>
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
@ -5233,7 +5325,118 @@
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
<div class="highlight"><span class="filename">hash_map_open_addressing.rb</span><pre><span></span><code><a id="__codelineno-26-1" name="__codelineno-26-1" href="#__codelineno-26-1"></a><span class="o">[</span><span class="n">class</span><span class="o">]</span><span class="p">{</span><span class="no">HashMapOpenAddressing</span><span class="p">}</span><span class="o">-[</span><span class="n">func</span><span class="o">]</span><span class="p">{}</span>
|
||||
<div class="highlight"><span class="filename">hash_map_open_addressing.rb</span><pre><span></span><code><a id="__codelineno-26-1" name="__codelineno-26-1" href="#__codelineno-26-1"></a><span class="c1">### 开放寻址哈希表 ###</span>
|
||||
<a id="__codelineno-26-2" name="__codelineno-26-2" href="#__codelineno-26-2"></a><span class="k">class</span><span class="w"> </span><span class="nc">HashMapOpenAddressing</span>
|
||||
<a id="__codelineno-26-3" name="__codelineno-26-3" href="#__codelineno-26-3"></a><span class="w"> </span><span class="no">TOMBSTONE</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="no">Pair</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="o">-</span><span class="mi">1</span><span class="p">,</span><span class="w"> </span><span class="s1">'-1'</span><span class="p">)</span><span class="w"> </span><span class="c1"># 删除标记</span>
|
||||
<a id="__codelineno-26-4" name="__codelineno-26-4" href="#__codelineno-26-4"></a>
|
||||
<a id="__codelineno-26-5" name="__codelineno-26-5" href="#__codelineno-26-5"></a><span class="w"> </span><span class="c1">### 构造方法 ###</span>
|
||||
<a id="__codelineno-26-6" name="__codelineno-26-6" href="#__codelineno-26-6"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">initialize</span>
|
||||
<a id="__codelineno-26-7" name="__codelineno-26-7" href="#__codelineno-26-7"></a><span class="w"> </span><span class="vi">@size</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span><span class="w"> </span><span class="c1"># 键值对数量</span>
|
||||
<a id="__codelineno-26-8" name="__codelineno-26-8" href="#__codelineno-26-8"></a><span class="w"> </span><span class="vi">@capacity</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">4</span><span class="w"> </span><span class="c1"># 哈希表容量</span>
|
||||
<a id="__codelineno-26-9" name="__codelineno-26-9" href="#__codelineno-26-9"></a><span class="w"> </span><span class="vi">@load_thres</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">2</span><span class="o">.</span><span class="mi">0</span><span class="w"> </span><span class="o">/</span><span class="w"> </span><span class="mi">3</span><span class="o">.</span><span class="mi">0</span><span class="w"> </span><span class="c1"># 触发扩容的负载因子阈值</span>
|
||||
<a id="__codelineno-26-10" name="__codelineno-26-10" href="#__codelineno-26-10"></a><span class="w"> </span><span class="vi">@extend_ratio</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">2</span><span class="w"> </span><span class="c1"># 扩容倍数</span>
|
||||
<a id="__codelineno-26-11" name="__codelineno-26-11" href="#__codelineno-26-11"></a><span class="w"> </span><span class="vi">@buckets</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">Array</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="vi">@capacity</span><span class="p">)</span><span class="w"> </span><span class="c1"># 桶数组</span>
|
||||
<a id="__codelineno-26-12" name="__codelineno-26-12" href="#__codelineno-26-12"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-13" name="__codelineno-26-13" href="#__codelineno-26-13"></a>
|
||||
<a id="__codelineno-26-14" name="__codelineno-26-14" href="#__codelineno-26-14"></a><span class="w"> </span><span class="c1">### 哈希函数 ###</span>
|
||||
<a id="__codelineno-26-15" name="__codelineno-26-15" href="#__codelineno-26-15"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">hash_func</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-16" name="__codelineno-26-16" href="#__codelineno-26-16"></a><span class="w"> </span><span class="n">key</span><span class="w"> </span><span class="o">%</span><span class="w"> </span><span class="vi">@capacity</span>
|
||||
<a id="__codelineno-26-17" name="__codelineno-26-17" href="#__codelineno-26-17"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-18" name="__codelineno-26-18" href="#__codelineno-26-18"></a>
|
||||
<a id="__codelineno-26-19" name="__codelineno-26-19" href="#__codelineno-26-19"></a><span class="w"> </span><span class="c1">### 负载因子 ###</span>
|
||||
<a id="__codelineno-26-20" name="__codelineno-26-20" href="#__codelineno-26-20"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">load_factor</span>
|
||||
<a id="__codelineno-26-21" name="__codelineno-26-21" href="#__codelineno-26-21"></a><span class="w"> </span><span class="vi">@size</span><span class="w"> </span><span class="o">/</span><span class="w"> </span><span class="vi">@capacity</span>
|
||||
<a id="__codelineno-26-22" name="__codelineno-26-22" href="#__codelineno-26-22"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-23" name="__codelineno-26-23" href="#__codelineno-26-23"></a>
|
||||
<a id="__codelineno-26-24" name="__codelineno-26-24" href="#__codelineno-26-24"></a><span class="w"> </span><span class="c1">### 搜索 key 对应的桶索引 ###</span>
|
||||
<a id="__codelineno-26-25" name="__codelineno-26-25" href="#__codelineno-26-25"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">find_bucket</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-26" name="__codelineno-26-26" href="#__codelineno-26-26"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">hash_func</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-27" name="__codelineno-26-27" href="#__codelineno-26-27"></a><span class="w"> </span><span class="n">first_tombstone</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="o">-</span><span class="mi">1</span>
|
||||
<a id="__codelineno-26-28" name="__codelineno-26-28" href="#__codelineno-26-28"></a><span class="w"> </span><span class="c1"># 线性探测，当遇到空桶时跳出</span>
|
||||
<a id="__codelineno-26-29" name="__codelineno-26-29" href="#__codelineno-26-29"></a><span class="w"> </span><span class="k">while</span><span class="w"> </span><span class="o">!</span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">].</span><span class="n">nil?</span>
|
||||
<a id="__codelineno-26-30" name="__codelineno-26-30" href="#__codelineno-26-30"></a><span class="w"> </span><span class="c1"># 若遇到 key ，返回对应的桶索引</span>
|
||||
<a id="__codelineno-26-31" name="__codelineno-26-31" href="#__codelineno-26-31"></a><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">].</span><span class="n">key</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="n">key</span>
|
||||
<a id="__codelineno-26-32" name="__codelineno-26-32" href="#__codelineno-26-32"></a><span class="w"> </span><span class="c1"># 若之前遇到了删除标记，则将键值对移动至该索引处</span>
|
||||
<a id="__codelineno-26-33" name="__codelineno-26-33" href="#__codelineno-26-33"></a><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="n">first_tombstone</span><span class="w"> </span><span class="o">!=</span><span class="w"> </span><span class="o">-</span><span class="mi">1</span>
|
||||
<a id="__codelineno-26-34" name="__codelineno-26-34" href="#__codelineno-26-34"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">first_tombstone</span><span class="o">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span>
|
||||
<a id="__codelineno-26-35" name="__codelineno-26-35" href="#__codelineno-26-35"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="no">TOMBSTONE</span>
|
||||
<a id="__codelineno-26-36" name="__codelineno-26-36" href="#__codelineno-26-36"></a><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">first_tombstone</span><span class="w"> </span><span class="c1"># 返回移动后的桶索引</span>
|
||||
<a id="__codelineno-26-37" name="__codelineno-26-37" href="#__codelineno-26-37"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-38" name="__codelineno-26-38" href="#__codelineno-26-38"></a><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="c1"># 返回桶索引</span>
|
||||
<a id="__codelineno-26-39" name="__codelineno-26-39" href="#__codelineno-26-39"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-40" name="__codelineno-26-40" href="#__codelineno-26-40"></a><span class="w"> </span><span class="c1"># 记录遇到的首个删除标记</span>
|
||||
<a id="__codelineno-26-41" name="__codelineno-26-41" href="#__codelineno-26-41"></a><span class="w"> </span><span class="n">first_tombstone</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="n">first_tombstone</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="o">-</span><span class="mi">1</span><span class="w"> </span><span class="o">&&</span><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="no">TOMBSTONE</span>
|
||||
<a id="__codelineno-26-42" name="__codelineno-26-42" href="#__codelineno-26-42"></a><span class="w"> </span><span class="c1"># 计算桶索引，越过尾部则返回头部</span>
|
||||
<a id="__codelineno-26-43" name="__codelineno-26-43" href="#__codelineno-26-43"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="n">index</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="mi">1</span><span class="p">)</span><span class="w"> </span><span class="o">%</span><span class="w"> </span><span class="vi">@capacity</span>
|
||||
<a id="__codelineno-26-44" name="__codelineno-26-44" href="#__codelineno-26-44"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-45" name="__codelineno-26-45" href="#__codelineno-26-45"></a><span class="w"> </span><span class="c1"># 若 key 不存在，则返回添加点的索引</span>
|
||||
<a id="__codelineno-26-46" name="__codelineno-26-46" href="#__codelineno-26-46"></a><span class="w"> </span><span class="n">first_tombstone</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="o">-</span><span class="mi">1</span><span class="w"> </span><span class="o">?</span><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="p">:</span><span class="w"> </span><span class="n">first_tombstone</span>
|
||||
<a id="__codelineno-26-47" name="__codelineno-26-47" href="#__codelineno-26-47"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-48" name="__codelineno-26-48" href="#__codelineno-26-48"></a>
|
||||
<a id="__codelineno-26-49" name="__codelineno-26-49" href="#__codelineno-26-49"></a><span class="w"> </span><span class="c1">### 查询操作 ###</span>
|
||||
<a id="__codelineno-26-50" name="__codelineno-26-50" href="#__codelineno-26-50"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">get</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-51" name="__codelineno-26-51" href="#__codelineno-26-51"></a><span class="w"> </span><span class="c1"># 搜索 key 对应的桶索引</span>
|
||||
<a id="__codelineno-26-52" name="__codelineno-26-52" href="#__codelineno-26-52"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">find_bucket</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-53" name="__codelineno-26-53" href="#__codelineno-26-53"></a><span class="w"> </span><span class="c1"># 若找到键值对，则返回对应 val</span>
|
||||
<a id="__codelineno-26-54" name="__codelineno-26-54" href="#__codelineno-26-54"></a><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">].</span><span class="n">val</span><span class="w"> </span><span class="k">unless</span><span class="w"> </span><span class="o">[</span><span class="kp">nil</span><span class="p">,</span><span class="w"> </span><span class="no">TOMBSTONE</span><span class="o">].</span><span class="n">include?</span><span class="p">(</span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-55" name="__codelineno-26-55" href="#__codelineno-26-55"></a><span class="w"> </span><span class="c1"># 若键值对不存在，则返回 nil</span>
|
||||
<a id="__codelineno-26-56" name="__codelineno-26-56" href="#__codelineno-26-56"></a><span class="w"> </span><span class="kp">nil</span>
|
||||
<a id="__codelineno-26-57" name="__codelineno-26-57" href="#__codelineno-26-57"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-58" name="__codelineno-26-58" href="#__codelineno-26-58"></a>
|
||||
<a id="__codelineno-26-59" name="__codelineno-26-59" href="#__codelineno-26-59"></a><span class="w"> </span><span class="c1">### 添加操作 ###</span>
|
||||
<a id="__codelineno-26-60" name="__codelineno-26-60" href="#__codelineno-26-60"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">put</span><span class="p">(</span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">val</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-61" name="__codelineno-26-61" href="#__codelineno-26-61"></a><span class="w"> </span><span class="c1"># 当负载因子超过阈值时，执行扩容</span>
|
||||
<a id="__codelineno-26-62" name="__codelineno-26-62" href="#__codelineno-26-62"></a><span class="w"> </span><span class="kp">extend</span><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="n">load_factor</span><span class="w"> </span><span class="o">></span><span class="w"> </span><span class="vi">@load_thres</span>
|
||||
<a id="__codelineno-26-63" name="__codelineno-26-63" href="#__codelineno-26-63"></a><span class="w"> </span><span class="c1"># 搜索 key 对应的桶索引</span>
|
||||
<a id="__codelineno-26-64" name="__codelineno-26-64" href="#__codelineno-26-64"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">find_bucket</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-65" name="__codelineno-26-65" href="#__codelineno-26-65"></a><span class="w"> </span><span class="c1"># 若找到键值对，则覆盖 val 开返回</span>
|
||||
<a id="__codelineno-26-66" name="__codelineno-26-66" href="#__codelineno-26-66"></a><span class="w"> </span><span class="k">unless</span><span class="w"> </span><span class="o">[</span><span class="kp">nil</span><span class="p">,</span><span class="w"> </span><span class="no">TOMBSTONE</span><span class="o">].</span><span class="n">include?</span><span class="p">(</span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-67" name="__codelineno-26-67" href="#__codelineno-26-67"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">].</span><span class="n">val</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">val</span>
|
||||
<a id="__codelineno-26-68" name="__codelineno-26-68" href="#__codelineno-26-68"></a><span class="w"> </span><span class="k">return</span>
|
||||
<a id="__codelineno-26-69" name="__codelineno-26-69" href="#__codelineno-26-69"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-70" name="__codelineno-26-70" href="#__codelineno-26-70"></a><span class="w"> </span><span class="c1"># 若键值对不存在，则添加该键值对</span>
|
||||
<a id="__codelineno-26-71" name="__codelineno-26-71" href="#__codelineno-26-71"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="no">Pair</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">val</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-72" name="__codelineno-26-72" href="#__codelineno-26-72"></a><span class="w"> </span><span class="vi">@size</span><span class="w"> </span><span class="o">+=</span><span class="w"> </span><span class="mi">1</span>
|
||||
<a id="__codelineno-26-73" name="__codelineno-26-73" href="#__codelineno-26-73"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-74" name="__codelineno-26-74" href="#__codelineno-26-74"></a>
|
||||
<a id="__codelineno-26-75" name="__codelineno-26-75" href="#__codelineno-26-75"></a><span class="w"> </span><span class="c1">### 删除操作 ###</span>
|
||||
<a id="__codelineno-26-76" name="__codelineno-26-76" href="#__codelineno-26-76"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">remove</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-77" name="__codelineno-26-77" href="#__codelineno-26-77"></a><span class="w"> </span><span class="c1"># 搜索 key 对应的桶索引</span>
|
||||
<a id="__codelineno-26-78" name="__codelineno-26-78" href="#__codelineno-26-78"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">find_bucket</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-79" name="__codelineno-26-79" href="#__codelineno-26-79"></a><span class="w"> </span><span class="c1"># 若找到键值对，则用删除标记覆盖它</span>
|
||||
<a id="__codelineno-26-80" name="__codelineno-26-80" href="#__codelineno-26-80"></a><span class="w"> </span><span class="k">unless</span><span class="w"> </span><span class="o">[</span><span class="kp">nil</span><span class="p">,</span><span class="w"> </span><span class="no">TOMBSTONE</span><span class="o">].</span><span class="n">include?</span><span class="p">(</span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-81" name="__codelineno-26-81" href="#__codelineno-26-81"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="no">TOMBSTONE</span>
|
||||
<a id="__codelineno-26-82" name="__codelineno-26-82" href="#__codelineno-26-82"></a><span class="w"> </span><span class="vi">@size</span><span class="w"> </span><span class="o">-=</span><span class="w"> </span><span class="mi">1</span>
|
||||
<a id="__codelineno-26-83" name="__codelineno-26-83" href="#__codelineno-26-83"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-84" name="__codelineno-26-84" href="#__codelineno-26-84"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-85" name="__codelineno-26-85" href="#__codelineno-26-85"></a>
|
||||
<a id="__codelineno-26-86" name="__codelineno-26-86" href="#__codelineno-26-86"></a><span class="w"> </span><span class="c1">### 扩容哈希表 ###</span>
|
||||
<a id="__codelineno-26-87" name="__codelineno-26-87" href="#__codelineno-26-87"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">extend</span>
|
||||
<a id="__codelineno-26-88" name="__codelineno-26-88" href="#__codelineno-26-88"></a><span class="w"> </span><span class="c1"># 暂存原哈希表</span>
|
||||
<a id="__codelineno-26-89" name="__codelineno-26-89" href="#__codelineno-26-89"></a><span class="w"> </span><span class="n">buckets_tmp</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="vi">@buckets</span>
|
||||
<a id="__codelineno-26-90" name="__codelineno-26-90" href="#__codelineno-26-90"></a><span class="w"> </span><span class="c1"># 初始化扩容后的新哈希表</span>
|
||||
<a id="__codelineno-26-91" name="__codelineno-26-91" href="#__codelineno-26-91"></a><span class="w"> </span><span class="vi">@capacity</span><span class="w"> </span><span class="o">*=</span><span class="w"> </span><span class="vi">@extend_ratio</span>
|
||||
<a id="__codelineno-26-92" name="__codelineno-26-92" href="#__codelineno-26-92"></a><span class="w"> </span><span class="vi">@buckets</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">Array</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="vi">@capacity</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-93" name="__codelineno-26-93" href="#__codelineno-26-93"></a><span class="w"> </span><span class="vi">@size</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span>
|
||||
<a id="__codelineno-26-94" name="__codelineno-26-94" href="#__codelineno-26-94"></a><span class="w"> </span><span class="c1"># 将键值对从原哈希表搬运至新哈希表</span>
|
||||
<a id="__codelineno-26-95" name="__codelineno-26-95" href="#__codelineno-26-95"></a><span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="n">buckets_tmp</span>
|
||||
<a id="__codelineno-26-96" name="__codelineno-26-96" href="#__codelineno-26-96"></a><span class="w"> </span><span class="n">put</span><span class="p">(</span><span class="n">pair</span><span class="o">.</span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">val</span><span class="p">)</span><span class="w"> </span><span class="k">unless</span><span class="w"> </span><span class="o">[</span><span class="kp">nil</span><span class="p">,</span><span class="w"> </span><span class="no">TOMBSTONE</span><span class="o">].</span><span class="n">include?</span><span class="p">(</span><span class="n">pair</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-97" name="__codelineno-26-97" href="#__codelineno-26-97"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-98" name="__codelineno-26-98" href="#__codelineno-26-98"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-99" name="__codelineno-26-99" href="#__codelineno-26-99"></a>
|
||||
<a id="__codelineno-26-100" name="__codelineno-26-100" href="#__codelineno-26-100"></a><span class="w"> </span><span class="c1">### 打印哈希表 ###</span>
|
||||
<a id="__codelineno-26-101" name="__codelineno-26-101" href="#__codelineno-26-101"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">print</span>
|
||||
<a id="__codelineno-26-102" name="__codelineno-26-102" href="#__codelineno-26-102"></a><span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="vi">@buckets</span>
|
||||
<a id="__codelineno-26-103" name="__codelineno-26-103" href="#__codelineno-26-103"></a><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">nil?</span>
|
||||
<a id="__codelineno-26-104" name="__codelineno-26-104" href="#__codelineno-26-104"></a><span class="w"> </span><span class="nb">puts</span><span class="w"> </span><span class="s2">"Nil"</span>
|
||||
<a id="__codelineno-26-105" name="__codelineno-26-105" href="#__codelineno-26-105"></a><span class="w"> </span><span class="k">elsif</span><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="no">TOMBSTONE</span>
|
||||
<a id="__codelineno-26-106" name="__codelineno-26-106" href="#__codelineno-26-106"></a><span class="w"> </span><span class="nb">puts</span><span class="w"> </span><span class="s2">"TOMBSTONE"</span>
|
||||
<a id="__codelineno-26-107" name="__codelineno-26-107" href="#__codelineno-26-107"></a><span class="w"> </span><span class="k">else</span>
|
||||
<a id="__codelineno-26-108" name="__codelineno-26-108" href="#__codelineno-26-108"></a><span class="w"> </span><span class="nb">puts</span><span class="w"> </span><span class="s2">"</span><span class="si">#{</span><span class="n">pair</span><span class="o">.</span><span class="n">key</span><span class="si">}</span><span class="s2"> -> </span><span class="si">#{</span><span class="n">pair</span><span class="o">.</span><span class="n">val</span><span class="si">}</span><span class="s2">"</span>
|
||||
<a id="__codelineno-26-109" name="__codelineno-26-109" href="#__codelineno-26-109"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-110" name="__codelineno-26-110" href="#__codelineno-26-110"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-111" name="__codelineno-26-111" href="#__codelineno-26-111"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-112" name="__codelineno-26-112" href="#__codelineno-26-112"></a><span class="k">end</span>
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
|
||||
@ -3711,9 +3711,78 @@
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
<div class="highlight"><span class="filename">array_hash_map.rb</span><pre><span></span><code><a id="__codelineno-39-1" name="__codelineno-39-1" href="#__codelineno-39-1"></a><span class="o">[</span><span class="n">class</span><span class="o">]</span><span class="p">{</span><span class="no">Pair</span><span class="p">}</span><span class="o">-[</span><span class="n">func</span><span class="o">]</span><span class="p">{}</span>
|
||||
<a id="__codelineno-39-2" name="__codelineno-39-2" href="#__codelineno-39-2"></a>
|
||||
<a id="__codelineno-39-3" name="__codelineno-39-3" href="#__codelineno-39-3"></a><span class="o">[</span><span class="n">class</span><span class="o">]</span><span class="p">{</span><span class="no">ArrayHashMap</span><span class="p">}</span><span class="o">-[</span><span class="n">func</span><span class="o">]</span><span class="p">{}</span>
|
||||
<div class="highlight"><span class="filename">array_hash_map.rb</span><pre><span></span><code><a id="__codelineno-39-1" name="__codelineno-39-1" href="#__codelineno-39-1"></a><span class="c1">### 键值对 ###</span>
|
||||
<a id="__codelineno-39-2" name="__codelineno-39-2" href="#__codelineno-39-2"></a><span class="k">class</span><span class="w"> </span><span class="nc">Pair</span>
|
||||
<a id="__codelineno-39-3" name="__codelineno-39-3" href="#__codelineno-39-3"></a><span class="w"> </span><span class="kp">attr_accessor</span><span class="w"> </span><span class="ss">:key</span><span class="p">,</span><span class="w"> </span><span class="ss">:val</span>
|
||||
<a id="__codelineno-39-4" name="__codelineno-39-4" href="#__codelineno-39-4"></a>
|
||||
<a id="__codelineno-39-5" name="__codelineno-39-5" href="#__codelineno-39-5"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">initialize</span><span class="p">(</span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">val</span><span class="p">)</span>
|
||||
<a id="__codelineno-39-6" name="__codelineno-39-6" href="#__codelineno-39-6"></a><span class="w"> </span><span class="vi">@key</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">key</span>
|
||||
<a id="__codelineno-39-7" name="__codelineno-39-7" href="#__codelineno-39-7"></a><span class="w"> </span><span class="vi">@val</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">val</span>
|
||||
<a id="__codelineno-39-8" name="__codelineno-39-8" href="#__codelineno-39-8"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-39-9" name="__codelineno-39-9" href="#__codelineno-39-9"></a><span class="k">end</span>
|
||||
<a id="__codelineno-39-10" name="__codelineno-39-10" href="#__codelineno-39-10"></a>
|
||||
<a id="__codelineno-39-11" name="__codelineno-39-11" href="#__codelineno-39-11"></a><span class="c1">### 基于数组实现的哈希表 ###</span>
|
||||
<a id="__codelineno-39-12" name="__codelineno-39-12" href="#__codelineno-39-12"></a><span class="k">class</span><span class="w"> </span><span class="nc">ArrayHashMap</span>
|
||||
<a id="__codelineno-39-13" name="__codelineno-39-13" href="#__codelineno-39-13"></a><span class="w"> </span><span class="c1">### 构造方法 ###</span>
|
||||
<a id="__codelineno-39-14" name="__codelineno-39-14" href="#__codelineno-39-14"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">initialize</span>
|
||||
<a id="__codelineno-39-15" name="__codelineno-39-15" href="#__codelineno-39-15"></a><span class="w"> </span><span class="c1"># 初始化数组，包含 100 个桶</span>
|
||||
<a id="__codelineno-39-16" name="__codelineno-39-16" href="#__codelineno-39-16"></a><span class="w"> </span><span class="vi">@buckets</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">Array</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="mi">100</span><span class="p">)</span>
|
||||
<a id="__codelineno-39-17" name="__codelineno-39-17" href="#__codelineno-39-17"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-39-18" name="__codelineno-39-18" href="#__codelineno-39-18"></a>
|
||||
<a id="__codelineno-39-19" name="__codelineno-39-19" href="#__codelineno-39-19"></a><span class="w"> </span><span class="c1">### 哈希函数 ###</span>
|
||||
<a id="__codelineno-39-20" name="__codelineno-39-20" href="#__codelineno-39-20"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">hash_func</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-39-21" name="__codelineno-39-21" href="#__codelineno-39-21"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">key</span><span class="w"> </span><span class="o">%</span><span class="w"> </span><span class="mi">100</span>
|
||||
<a id="__codelineno-39-22" name="__codelineno-39-22" href="#__codelineno-39-22"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-39-23" name="__codelineno-39-23" href="#__codelineno-39-23"></a>
|
||||
<a id="__codelineno-39-24" name="__codelineno-39-24" href="#__codelineno-39-24"></a><span class="w"> </span><span class="c1">### 查询操作 ###</span>
|
||||
<a id="__codelineno-39-25" name="__codelineno-39-25" href="#__codelineno-39-25"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">get</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-39-26" name="__codelineno-39-26" href="#__codelineno-39-26"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">hash_func</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-39-27" name="__codelineno-39-27" href="#__codelineno-39-27"></a><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span>
|
||||
<a id="__codelineno-39-28" name="__codelineno-39-28" href="#__codelineno-39-28"></a>
|
||||
<a id="__codelineno-39-29" name="__codelineno-39-29" href="#__codelineno-39-29"></a><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">nil?</span>
|
||||
<a id="__codelineno-39-30" name="__codelineno-39-30" href="#__codelineno-39-30"></a><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">val</span>
|
||||
<a id="__codelineno-39-31" name="__codelineno-39-31" href="#__codelineno-39-31"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-39-32" name="__codelineno-39-32" href="#__codelineno-39-32"></a>
|
||||
<a id="__codelineno-39-33" name="__codelineno-39-33" href="#__codelineno-39-33"></a><span class="w"> </span><span class="c1">### 添加操作 ###</span>
|
||||
<a id="__codelineno-39-34" name="__codelineno-39-34" href="#__codelineno-39-34"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">put</span><span class="p">(</span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">val</span><span class="p">)</span>
|
||||
<a id="__codelineno-39-35" name="__codelineno-39-35" href="#__codelineno-39-35"></a><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="no">Pair</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">val</span><span class="p">)</span>
|
||||
<a id="__codelineno-39-36" name="__codelineno-39-36" href="#__codelineno-39-36"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">hash_func</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-39-37" name="__codelineno-39-37" href="#__codelineno-39-37"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">pair</span>
|
||||
<a id="__codelineno-39-38" name="__codelineno-39-38" href="#__codelineno-39-38"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-39-39" name="__codelineno-39-39" href="#__codelineno-39-39"></a>
|
||||
<a id="__codelineno-39-40" name="__codelineno-39-40" href="#__codelineno-39-40"></a><span class="w"> </span><span class="c1">### 删除操作 ###</span>
|
||||
<a id="__codelineno-39-41" name="__codelineno-39-41" href="#__codelineno-39-41"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">remove</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-39-42" name="__codelineno-39-42" href="#__codelineno-39-42"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">hash_func</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-39-43" name="__codelineno-39-43" href="#__codelineno-39-43"></a><span class="w"> </span><span class="c1"># 置为 nil ，代表删除</span>
|
||||
<a id="__codelineno-39-44" name="__codelineno-39-44" href="#__codelineno-39-44"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="kp">nil</span>
|
||||
<a id="__codelineno-39-45" name="__codelineno-39-45" href="#__codelineno-39-45"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-39-46" name="__codelineno-39-46" href="#__codelineno-39-46"></a>
|
||||
<a id="__codelineno-39-47" name="__codelineno-39-47" href="#__codelineno-39-47"></a><span class="w"> </span><span class="c1">### 获取所有键值对 ###</span>
|
||||
<a id="__codelineno-39-48" name="__codelineno-39-48" href="#__codelineno-39-48"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">entry_set</span>
|
||||
<a id="__codelineno-39-49" name="__codelineno-39-49" href="#__codelineno-39-49"></a><span class="w"> </span><span class="n">result</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="o">[]</span>
|
||||
<a id="__codelineno-39-50" name="__codelineno-39-50" href="#__codelineno-39-50"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">.</span><span class="n">each</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">|</span><span class="n">pair</span><span class="o">|</span><span class="w"> </span><span class="n">result</span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="k">unless</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">nil?</span><span class="w"> </span><span class="p">}</span>
|
||||
<a id="__codelineno-39-51" name="__codelineno-39-51" href="#__codelineno-39-51"></a><span class="w"> </span><span class="n">result</span>
|
||||
<a id="__codelineno-39-52" name="__codelineno-39-52" href="#__codelineno-39-52"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-39-53" name="__codelineno-39-53" href="#__codelineno-39-53"></a>
|
||||
<a id="__codelineno-39-54" name="__codelineno-39-54" href="#__codelineno-39-54"></a><span class="w"> </span><span class="c1">### 获取所有键 ###</span>
|
||||
<a id="__codelineno-39-55" name="__codelineno-39-55" href="#__codelineno-39-55"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">key_set</span>
|
||||
<a id="__codelineno-39-56" name="__codelineno-39-56" href="#__codelineno-39-56"></a><span class="w"> </span><span class="n">result</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="o">[]</span>
|
||||
<a id="__codelineno-39-57" name="__codelineno-39-57" href="#__codelineno-39-57"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">.</span><span class="n">each</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">|</span><span class="n">pair</span><span class="o">|</span><span class="w"> </span><span class="n">result</span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">key</span><span class="w"> </span><span class="k">unless</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">nil?</span><span class="w"> </span><span class="p">}</span>
|
||||
<a id="__codelineno-39-58" name="__codelineno-39-58" href="#__codelineno-39-58"></a><span class="w"> </span><span class="n">result</span>
|
||||
<a id="__codelineno-39-59" name="__codelineno-39-59" href="#__codelineno-39-59"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-39-60" name="__codelineno-39-60" href="#__codelineno-39-60"></a>
|
||||
<a id="__codelineno-39-61" name="__codelineno-39-61" href="#__codelineno-39-61"></a><span class="w"> </span><span class="c1">### 获取所有值 ###</span>
|
||||
<a id="__codelineno-39-62" name="__codelineno-39-62" href="#__codelineno-39-62"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">value_set</span>
|
||||
<a id="__codelineno-39-63" name="__codelineno-39-63" href="#__codelineno-39-63"></a><span class="w"> </span><span class="n">result</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="o">[]</span>
|
||||
<a id="__codelineno-39-64" name="__codelineno-39-64" href="#__codelineno-39-64"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">.</span><span class="n">each</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">|</span><span class="n">pair</span><span class="o">|</span><span class="w"> </span><span class="n">result</span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">val</span><span class="w"> </span><span class="k">unless</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">nil?</span><span class="w"> </span><span class="p">}</span>
|
||||
<a id="__codelineno-39-65" name="__codelineno-39-65" href="#__codelineno-39-65"></a><span class="w"> </span><span class="n">result</span>
|
||||
<a id="__codelineno-39-66" name="__codelineno-39-66" href="#__codelineno-39-66"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-39-67" name="__codelineno-39-67" href="#__codelineno-39-67"></a>
|
||||
<a id="__codelineno-39-68" name="__codelineno-39-68" href="#__codelineno-39-68"></a><span class="w"> </span><span class="c1">### 打印哈希表 ###</span>
|
||||
<a id="__codelineno-39-69" name="__codelineno-39-69" href="#__codelineno-39-69"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">print</span>
|
||||
<a id="__codelineno-39-70" name="__codelineno-39-70" href="#__codelineno-39-70"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">.</span><span class="n">each</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">|</span><span class="n">pair</span><span class="o">|</span><span class="w"> </span><span class="nb">puts</span><span class="w"> </span><span class="s2">"</span><span class="si">#{</span><span class="n">pair</span><span class="o">.</span><span class="n">key</span><span class="si">}</span><span class="s2"> -> </span><span class="si">#{</span><span class="n">pair</span><span class="o">.</span><span class="n">val</span><span class="si">}</span><span class="s2">"</span><span class="w"> </span><span class="k">unless</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">nil?</span><span class="w"> </span><span class="p">}</span>
|
||||
<a id="__codelineno-39-71" name="__codelineno-39-71" href="#__codelineno-39-71"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-39-72" name="__codelineno-39-72" href="#__codelineno-39-72"></a><span class="k">end</span>
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
|
||||
@ -2604,7 +2604,7 @@
|
||||
<a id="__codelineno-13-22" name="__codelineno-13-22" href="#__codelineno-13-22"></a>
|
||||
<a id="__codelineno-13-23" name="__codelineno-13-23" href="#__codelineno-13-23"></a> <span class="k">def</span> <span class="nf">is_empty</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="nb">bool</span><span class="p">:</span>
|
||||
<a id="__codelineno-13-24" name="__codelineno-13-24" href="#__codelineno-13-24"></a><span class="w"> </span><span class="sd">"""判断双向队列是否为空"""</span>
|
||||
<a id="__codelineno-13-25" name="__codelineno-13-25" href="#__codelineno-13-25"></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">size</span><span class="p">()</span> <span class="o">==</span> <span class="mi">0</span>
|
||||
<a id="__codelineno-13-25" name="__codelineno-13-25" href="#__codelineno-13-25"></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_size</span> <span class="o">==</span> <span class="mi">0</span>
|
||||
<a id="__codelineno-13-26" name="__codelineno-13-26" href="#__codelineno-13-26"></a>
|
||||
<a id="__codelineno-13-27" name="__codelineno-13-27" href="#__codelineno-13-27"></a> <span class="k">def</span> <span class="nf">push</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">num</span><span class="p">:</span> <span class="nb">int</span><span class="p">,</span> <span class="n">is_front</span><span class="p">:</span> <span class="nb">bool</span><span class="p">):</span>
|
||||
<a id="__codelineno-13-28" name="__codelineno-13-28" href="#__codelineno-13-28"></a><span class="w"> </span><span class="sd">"""入队操作"""</span>
|
||||
|
||||
@ -2553,7 +2553,7 @@
|
||||
<a id="__codelineno-13-13" name="__codelineno-13-13" href="#__codelineno-13-13"></a>
|
||||
<a id="__codelineno-13-14" name="__codelineno-13-14" href="#__codelineno-13-14"></a> <span class="k">def</span> <span class="nf">is_empty</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="nb">bool</span><span class="p">:</span>
|
||||
<a id="__codelineno-13-15" name="__codelineno-13-15" href="#__codelineno-13-15"></a><span class="w"> </span><span class="sd">"""判断队列是否为空"""</span>
|
||||
<a id="__codelineno-13-16" name="__codelineno-13-16" href="#__codelineno-13-16"></a> <span class="k">return</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_front</span>
|
||||
<a id="__codelineno-13-16" name="__codelineno-13-16" href="#__codelineno-13-16"></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_size</span> <span class="o">==</span> <span class="mi">0</span>
|
||||
<a id="__codelineno-13-17" name="__codelineno-13-17" href="#__codelineno-13-17"></a>
|
||||
<a id="__codelineno-13-18" name="__codelineno-13-18" href="#__codelineno-13-18"></a> <span class="k">def</span> <span class="nf">push</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">num</span><span class="p">:</span> <span class="nb">int</span><span class="p">):</span>
|
||||
<a id="__codelineno-13-19" name="__codelineno-13-19" href="#__codelineno-13-19"></a><span class="w"> </span><span class="sd">"""入队"""</span>
|
||||
|
||||
@ -2565,7 +2565,7 @@
|
||||
<a id="__codelineno-13-12" name="__codelineno-13-12" href="#__codelineno-13-12"></a>
|
||||
<a id="__codelineno-13-13" name="__codelineno-13-13" href="#__codelineno-13-13"></a> <span class="k">def</span> <span class="nf">is_empty</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="nb">bool</span><span class="p">:</span>
|
||||
<a id="__codelineno-13-14" name="__codelineno-13-14" href="#__codelineno-13-14"></a><span class="w"> </span><span class="sd">"""判断栈是否为空"""</span>
|
||||
<a id="__codelineno-13-15" name="__codelineno-13-15" href="#__codelineno-13-15"></a> <span class="k">return</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_peek</span>
|
||||
<a id="__codelineno-13-15" name="__codelineno-13-15" href="#__codelineno-13-15"></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_size</span> <span class="o">==</span> <span class="mi">0</span>
|
||||
<a id="__codelineno-13-16" name="__codelineno-13-16" href="#__codelineno-13-16"></a>
|
||||
<a id="__codelineno-13-17" name="__codelineno-13-17" href="#__codelineno-13-17"></a> <span class="k">def</span> <span class="nf">push</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">val</span><span class="p">:</span> <span class="nb">int</span><span class="p">):</span>
|
||||
<a id="__codelineno-13-18" name="__codelineno-13-18" href="#__codelineno-13-18"></a><span class="w"> </span><span class="sd">"""入栈"""</span>
|
||||
@ -3414,7 +3414,7 @@
|
||||
<a id="__codelineno-27-11" name="__codelineno-27-11" href="#__codelineno-27-11"></a>
|
||||
<a id="__codelineno-27-12" name="__codelineno-27-12" href="#__codelineno-27-12"></a> <span class="k">def</span> <span class="nf">is_empty</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="nb">bool</span><span class="p">:</span>
|
||||
<a id="__codelineno-27-13" name="__codelineno-27-13" href="#__codelineno-27-13"></a><span class="w"> </span><span class="sd">"""判断栈是否为空"""</span>
|
||||
<a id="__codelineno-27-14" name="__codelineno-27-14" href="#__codelineno-27-14"></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_stack</span> <span class="o">==</span> <span class="p">[]</span>
|
||||
<a id="__codelineno-27-14" name="__codelineno-27-14" href="#__codelineno-27-14"></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_size</span> <span class="o">==</span> <span class="mi">0</span>
|
||||
<a id="__codelineno-27-15" name="__codelineno-27-15" href="#__codelineno-27-15"></a>
|
||||
<a id="__codelineno-27-16" name="__codelineno-27-16" href="#__codelineno-27-16"></a> <span class="k">def</span> <span class="nf">push</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">item</span><span class="p">:</span> <span class="nb">int</span><span class="p">):</span>
|
||||
<a id="__codelineno-27-17" name="__codelineno-27-17" href="#__codelineno-27-17"></a><span class="w"> </span><span class="sd">"""入栈"""</span>
|
||||
|
||||
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110
en/sitemap.xml
110
en/sitemap.xml
@ -2,277 +2,277 @@
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BIN
sitemap.xml.gz
BIN
sitemap.xml.gz
Binary file not shown.
@ -3648,11 +3648,11 @@
|
||||
<p>我們可以將 0-1 背包問題看作一個由 <span class="arithmatex">\(n\)</span> 輪決策組成的過程，對於每個物體都有不放入和放入兩種決策，因此該問題滿足決策樹模型。</p>
|
||||
<p>該問題的目標是求解“在限定背包容量下能放入物品的最大價值”，因此較大機率是一個動態規劃問題。</p>
|
||||
<p><strong>第一步：思考每輪的決策，定義狀態，從而得到 <span class="arithmatex">\(dp\)</span> 表</strong></p>
|
||||
<p>對於每個物品來說，不放入背包，背包容量不變；放入背包，背包容量減小。由此可得狀態定義：當前物品編號 <span class="arithmatex">\(i\)</span> 和剩餘背包容量 <span class="arithmatex">\(c\)</span> ，記為 <span class="arithmatex">\([i, c]\)</span> 。</p>
|
||||
<p>狀態 <span class="arithmatex">\([i, c]\)</span> 對應的子問題為：<strong>前 <span class="arithmatex">\(i\)</span> 個物品在剩餘容量為 <span class="arithmatex">\(c\)</span> 的背包中的最大價值</strong>，記為 <span class="arithmatex">\(dp[i, c]\)</span> 。</p>
|
||||
<p>對於每個物品來說，不放入背包，背包容量不變；放入背包，背包容量減小。由此可得狀態定義：當前物品編號 <span class="arithmatex">\(i\)</span> 和背包容量 <span class="arithmatex">\(c\)</span> ，記為 <span class="arithmatex">\([i, c]\)</span> 。</p>
|
||||
<p>狀態 <span class="arithmatex">\([i, c]\)</span> 對應的子問題為：<strong>前 <span class="arithmatex">\(i\)</span> 個物品在容量為 <span class="arithmatex">\(c\)</span> 的背包中的最大價值</strong>，記為 <span class="arithmatex">\(dp[i, c]\)</span> 。</p>
|
||||
<p>待求解的是 <span class="arithmatex">\(dp[n, cap]\)</span> ，因此需要一個尺寸為 <span class="arithmatex">\((n+1) \times (cap+1)\)</span> 的二維 <span class="arithmatex">\(dp\)</span> 表。</p>
|
||||
<p><strong>第二步：找出最優子結構，進而推導出狀態轉移方程</strong></p>
|
||||
<p>當我們做出物品 <span class="arithmatex">\(i\)</span> 的決策後，剩餘的是前 <span class="arithmatex">\(i-1\)</span> 個物品的決策，可分為以下兩種情況。</p>
|
||||
<p>當我們做出物品 <span class="arithmatex">\(i\)</span> 的決策後，剩餘的是前 <span class="arithmatex">\(i-1\)</span> 個物品決策的子問題，可分為以下兩種情況。</p>
|
||||
<ul>
|
||||
<li><strong>不放入物品 <span class="arithmatex">\(i\)</span></strong> ：背包容量不變，狀態變化為 <span class="arithmatex">\([i-1, c]\)</span> 。</li>
|
||||
<li><strong>放入物品 <span class="arithmatex">\(i\)</span></strong> ：背包容量減少 <span class="arithmatex">\(wgt[i-1]\)</span> ，價值增加 <span class="arithmatex">\(val[i-1]\)</span> ，狀態變化為 <span class="arithmatex">\([i-1, c-wgt[i-1]]\)</span> 。</li>
|
||||
@ -3663,7 +3663,7 @@ dp[i, c] = \max(dp[i-1, c], dp[i-1, c - wgt[i-1]] + val[i-1])
|
||||
\]</div>
|
||||
<p>需要注意的是，若當前物品重量 <span class="arithmatex">\(wgt[i - 1]\)</span> 超出剩餘背包容量 <span class="arithmatex">\(c\)</span> ，則只能選擇不放入背包。</p>
|
||||
<p><strong>第三步：確定邊界條件和狀態轉移順序</strong></p>
|
||||
<p>當無物品或無剩餘背包容量時最大價值為 <span class="arithmatex">\(0\)</span> ，即首列 <span class="arithmatex">\(dp[i, 0]\)</span> 和首行 <span class="arithmatex">\(dp[0, c]\)</span> 都等於 <span class="arithmatex">\(0\)</span> 。</p>
|
||||
<p>當無物品或背包容量為 <span class="arithmatex">\(0\)</span> 時最大價值為 <span class="arithmatex">\(0\)</span> ，即首列 <span class="arithmatex">\(dp[i, 0]\)</span> 和首行 <span class="arithmatex">\(dp[0, c]\)</span> 都等於 <span class="arithmatex">\(0\)</span> 。</p>
|
||||
<p>當前狀態 <span class="arithmatex">\([i, c]\)</span> 從上方的狀態 <span class="arithmatex">\([i-1, c]\)</span> 和左上方的狀態 <span class="arithmatex">\([i-1, c-wgt[i-1]]\)</span> 轉移而來，因此透過兩層迴圈正序走訪整個 <span class="arithmatex">\(dp\)</span> 表即可。</p>
|
||||
<p>根據以上分析，我們接下來按順序實現暴力搜尋、記憶化搜尋、動態規劃解法。</p>
|
||||
<h3 id="1">1. 方法一：暴力搜尋<a class="headerlink" href="#1" title="Permanent link">¶</a></h3>
|
||||
|
||||
@ -3537,7 +3537,7 @@
|
||||
<p><strong>背包問題</strong></p>
|
||||
<ul>
|
||||
<li>背包問題是最典型的動態規劃問題之一，具有 0-1 背包、完全背包、多重背包等變種。</li>
|
||||
<li>0-1 背包的狀態定義為前 <span class="arithmatex">\(i\)</span> 個物品在剩餘容量為 <span class="arithmatex">\(c\)</span> 的背包中的最大價值。根據不放入背包和放入背包兩種決策，可得到最優子結構，並構建出狀態轉移方程。在空間最佳化中，由於每個狀態依賴正上方和左上方的狀態，因此需要倒序走訪串列，避免左上方狀態被覆蓋。</li>
|
||||
<li>0-1 背包的狀態定義為前 <span class="arithmatex">\(i\)</span> 個物品在容量為 <span class="arithmatex">\(c\)</span> 的背包中的最大價值。根據不放入背包和放入背包兩種決策，可得到最優子結構，並構建出狀態轉移方程。在空間最佳化中，由於每個狀態依賴正上方和左上方的狀態，因此需要倒序走訪串列，避免左上方狀態被覆蓋。</li>
|
||||
<li>完全背包問題的每種物品的選取數量無限制，因此選擇放入物品的狀態轉移與 0-1 背包問題不同。由於狀態依賴正上方和正左方的狀態，因此在空間最佳化中應當正序走訪。</li>
|
||||
<li>零錢兌換問題是完全背包問題的一個變種。它從求“最大”價值變為求“最小”硬幣數量，因此狀態轉移方程中的 <span class="arithmatex">\(\max()\)</span> 應改為 <span class="arithmatex">\(\min()\)</span> 。從追求“不超過”背包容量到追求“恰好”湊出目標金額，因此使用 <span class="arithmatex">\(amt + 1\)</span> 來表示“無法湊出目標金額”的無效解。</li>
|
||||
<li>零錢兌換問題 II 從求“最少硬幣數量”改為求“硬幣組合數量”，狀態轉移方程相應地從 <span class="arithmatex">\(\min()\)</span> 改為求和運算子。</li>
|
||||
|
||||
@ -4197,13 +4197,45 @@
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
<div class="highlight"><span class="filename">simple_hash.rb</span><pre><span></span><code><a id="__codelineno-13-1" name="__codelineno-13-1" href="#__codelineno-13-1"></a><span class="o">[</span><span class="n">class</span><span class="o">]</span><span class="p">{}</span><span class="o">-[</span><span class="n">func</span><span class="o">]</span><span class="p">{</span><span class="n">add_hash</span><span class="p">}</span>
|
||||
<a id="__codelineno-13-2" name="__codelineno-13-2" href="#__codelineno-13-2"></a>
|
||||
<a id="__codelineno-13-3" name="__codelineno-13-3" href="#__codelineno-13-3"></a><span class="o">[</span><span class="n">class</span><span class="o">]</span><span class="p">{}</span><span class="o">-[</span><span class="n">func</span><span class="o">]</span><span class="p">{</span><span class="n">mul_hash</span><span class="p">}</span>
|
||||
<a id="__codelineno-13-4" name="__codelineno-13-4" href="#__codelineno-13-4"></a>
|
||||
<a id="__codelineno-13-5" name="__codelineno-13-5" href="#__codelineno-13-5"></a><span class="o">[</span><span class="n">class</span><span class="o">]</span><span class="p">{}</span><span class="o">-[</span><span class="n">func</span><span class="o">]</span><span class="p">{</span><span class="n">xor_hash</span><span class="p">}</span>
|
||||
<a id="__codelineno-13-6" name="__codelineno-13-6" href="#__codelineno-13-6"></a>
|
||||
<a id="__codelineno-13-7" name="__codelineno-13-7" href="#__codelineno-13-7"></a><span class="o">[</span><span class="n">class</span><span class="o">]</span><span class="p">{}</span><span class="o">-[</span><span class="n">func</span><span class="o">]</span><span class="p">{</span><span class="n">rot_hash</span><span class="p">}</span>
|
||||
<div class="highlight"><span class="filename">simple_hash.rb</span><pre><span></span><code><a id="__codelineno-13-1" name="__codelineno-13-1" href="#__codelineno-13-1"></a><span class="c1">### 加法雜湊 ###</span>
|
||||
<a id="__codelineno-13-2" name="__codelineno-13-2" href="#__codelineno-13-2"></a><span class="k">def</span><span class="w"> </span><span class="nf">add_hash</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-13-3" name="__codelineno-13-3" href="#__codelineno-13-3"></a><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span>
|
||||
<a id="__codelineno-13-4" name="__codelineno-13-4" href="#__codelineno-13-4"></a><span class="w"> </span><span class="n">modulus</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">1_000_000_007</span>
|
||||
<a id="__codelineno-13-5" name="__codelineno-13-5" href="#__codelineno-13-5"></a>
|
||||
<a id="__codelineno-13-6" name="__codelineno-13-6" href="#__codelineno-13-6"></a><span class="w"> </span><span class="n">key</span><span class="o">.</span><span class="n">each_char</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">|</span><span class="n">c</span><span class="o">|</span><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">+=</span><span class="w"> </span><span class="n">c</span><span class="o">.</span><span class="n">ord</span><span class="w"> </span><span class="p">}</span>
|
||||
<a id="__codelineno-13-7" name="__codelineno-13-7" href="#__codelineno-13-7"></a>
|
||||
<a id="__codelineno-13-8" name="__codelineno-13-8" href="#__codelineno-13-8"></a><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">%</span><span class="w"> </span><span class="n">modulus</span>
|
||||
<a id="__codelineno-13-9" name="__codelineno-13-9" href="#__codelineno-13-9"></a><span class="k">end</span>
|
||||
<a id="__codelineno-13-10" name="__codelineno-13-10" href="#__codelineno-13-10"></a>
|
||||
<a id="__codelineno-13-11" name="__codelineno-13-11" href="#__codelineno-13-11"></a><span class="c1">### 乘法雜湊 ###</span>
|
||||
<a id="__codelineno-13-12" name="__codelineno-13-12" href="#__codelineno-13-12"></a><span class="k">def</span><span class="w"> </span><span class="nf">mul_hash</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-13-13" name="__codelineno-13-13" href="#__codelineno-13-13"></a><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span>
|
||||
<a id="__codelineno-13-14" name="__codelineno-13-14" href="#__codelineno-13-14"></a><span class="w"> </span><span class="n">modulus</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">1_000_000_007</span>
|
||||
<a id="__codelineno-13-15" name="__codelineno-13-15" href="#__codelineno-13-15"></a>
|
||||
<a id="__codelineno-13-16" name="__codelineno-13-16" href="#__codelineno-13-16"></a><span class="w"> </span><span class="n">key</span><span class="o">.</span><span class="n">each_char</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">|</span><span class="n">c</span><span class="o">|</span><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">31</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">c</span><span class="o">.</span><span class="n">ord</span><span class="w"> </span><span class="p">}</span>
|
||||
<a id="__codelineno-13-17" name="__codelineno-13-17" href="#__codelineno-13-17"></a>
|
||||
<a id="__codelineno-13-18" name="__codelineno-13-18" href="#__codelineno-13-18"></a><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">%</span><span class="w"> </span><span class="n">modulus</span>
|
||||
<a id="__codelineno-13-19" name="__codelineno-13-19" href="#__codelineno-13-19"></a><span class="k">end</span>
|
||||
<a id="__codelineno-13-20" name="__codelineno-13-20" href="#__codelineno-13-20"></a>
|
||||
<a id="__codelineno-13-21" name="__codelineno-13-21" href="#__codelineno-13-21"></a><span class="c1">### 互斥或雜湊 ###</span>
|
||||
<a id="__codelineno-13-22" name="__codelineno-13-22" href="#__codelineno-13-22"></a><span class="k">def</span><span class="w"> </span><span class="nf">xor_hash</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-13-23" name="__codelineno-13-23" href="#__codelineno-13-23"></a><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span>
|
||||
<a id="__codelineno-13-24" name="__codelineno-13-24" href="#__codelineno-13-24"></a><span class="w"> </span><span class="n">modulus</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">1_000_000_007</span>
|
||||
<a id="__codelineno-13-25" name="__codelineno-13-25" href="#__codelineno-13-25"></a>
|
||||
<a id="__codelineno-13-26" name="__codelineno-13-26" href="#__codelineno-13-26"></a><span class="w"> </span><span class="n">key</span><span class="o">.</span><span class="n">each_char</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">|</span><span class="n">c</span><span class="o">|</span><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">^=</span><span class="w"> </span><span class="n">c</span><span class="o">.</span><span class="n">ord</span><span class="w"> </span><span class="p">}</span>
|
||||
<a id="__codelineno-13-27" name="__codelineno-13-27" href="#__codelineno-13-27"></a>
|
||||
<a id="__codelineno-13-28" name="__codelineno-13-28" href="#__codelineno-13-28"></a><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">%</span><span class="w"> </span><span class="n">modulus</span>
|
||||
<a id="__codelineno-13-29" name="__codelineno-13-29" href="#__codelineno-13-29"></a><span class="k">end</span>
|
||||
<a id="__codelineno-13-30" name="__codelineno-13-30" href="#__codelineno-13-30"></a>
|
||||
<a id="__codelineno-13-31" name="__codelineno-13-31" href="#__codelineno-13-31"></a><span class="c1">### 旋轉雜湊 ###</span>
|
||||
<a id="__codelineno-13-32" name="__codelineno-13-32" href="#__codelineno-13-32"></a><span class="k">def</span><span class="w"> </span><span class="nf">rot_hash</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-13-33" name="__codelineno-13-33" href="#__codelineno-13-33"></a><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span>
|
||||
<a id="__codelineno-13-34" name="__codelineno-13-34" href="#__codelineno-13-34"></a><span class="w"> </span><span class="n">modulus</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">1_000_000_007</span>
|
||||
<a id="__codelineno-13-35" name="__codelineno-13-35" href="#__codelineno-13-35"></a>
|
||||
<a id="__codelineno-13-36" name="__codelineno-13-36" href="#__codelineno-13-36"></a><span class="w"> </span><span class="n">key</span><span class="o">.</span><span class="n">each_char</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">|</span><span class="n">c</span><span class="o">|</span><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="nb">hash</span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="mi">4</span><span class="p">)</span><span class="w"> </span><span class="o">^</span><span class="w"> </span><span class="p">(</span><span class="nb">hash</span><span class="w"> </span><span class="o">>></span><span class="w"> </span><span class="mi">28</span><span class="p">)</span><span class="w"> </span><span class="o">^</span><span class="w"> </span><span class="n">c</span><span class="o">.</span><span class="n">ord</span><span class="w"> </span><span class="p">}</span>
|
||||
<a id="__codelineno-13-37" name="__codelineno-13-37" href="#__codelineno-13-37"></a>
|
||||
<a id="__codelineno-13-38" name="__codelineno-13-38" href="#__codelineno-13-38"></a><span class="w"> </span><span class="nb">hash</span><span class="w"> </span><span class="o">%</span><span class="w"> </span><span class="n">modulus</span>
|
||||
<a id="__codelineno-13-39" name="__codelineno-13-39" href="#__codelineno-13-39"></a><span class="k">end</span>
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
@ -4553,7 +4585,29 @@
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
<div class="highlight"><span class="filename">built_in_hash.rb</span><pre><span></span><code><a id="__codelineno-27-1" name="__codelineno-27-1" href="#__codelineno-27-1"></a>
|
||||
<div class="highlight"><span class="filename">built_in_hash.rb</span><pre><span></span><code><a id="__codelineno-27-1" name="__codelineno-27-1" href="#__codelineno-27-1"></a><span class="n">num</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">3</span>
|
||||
<a id="__codelineno-27-2" name="__codelineno-27-2" href="#__codelineno-27-2"></a><span class="n">hash_num</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">num</span><span class="o">.</span><span class="n">hash</span>
|
||||
<a id="__codelineno-27-3" name="__codelineno-27-3" href="#__codelineno-27-3"></a><span class="c1"># 整數 3 的雜湊值為 -4385856518450339636</span>
|
||||
<a id="__codelineno-27-4" name="__codelineno-27-4" href="#__codelineno-27-4"></a>
|
||||
<a id="__codelineno-27-5" name="__codelineno-27-5" href="#__codelineno-27-5"></a><span class="n">bol</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="kp">true</span>
|
||||
<a id="__codelineno-27-6" name="__codelineno-27-6" href="#__codelineno-27-6"></a><span class="n">hash_bol</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">bol</span><span class="o">.</span><span class="n">hash</span>
|
||||
<a id="__codelineno-27-7" name="__codelineno-27-7" href="#__codelineno-27-7"></a><span class="c1"># 布林量 true 的雜湊值為 -1617938112149317027</span>
|
||||
<a id="__codelineno-27-8" name="__codelineno-27-8" href="#__codelineno-27-8"></a>
|
||||
<a id="__codelineno-27-9" name="__codelineno-27-9" href="#__codelineno-27-9"></a><span class="n">dec</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">3</span><span class="o">.</span><span class="mi">14159</span>
|
||||
<a id="__codelineno-27-10" name="__codelineno-27-10" href="#__codelineno-27-10"></a><span class="n">hash_dec</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">dec</span><span class="o">.</span><span class="n">hash</span>
|
||||
<a id="__codelineno-27-11" name="__codelineno-27-11" href="#__codelineno-27-11"></a><span class="c1"># 小數 3.14159 的雜湊值為 -1479186995943067893</span>
|
||||
<a id="__codelineno-27-12" name="__codelineno-27-12" href="#__codelineno-27-12"></a>
|
||||
<a id="__codelineno-27-13" name="__codelineno-27-13" href="#__codelineno-27-13"></a><span class="n">str</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">"Hello 演算法"</span>
|
||||
<a id="__codelineno-27-14" name="__codelineno-27-14" href="#__codelineno-27-14"></a><span class="n">hash_str</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">str</span><span class="o">.</span><span class="n">hash</span>
|
||||
<a id="__codelineno-27-15" name="__codelineno-27-15" href="#__codelineno-27-15"></a><span class="c1"># 字串“Hello 演算法”的雜湊值為 -4075943250025831763</span>
|
||||
<a id="__codelineno-27-16" name="__codelineno-27-16" href="#__codelineno-27-16"></a>
|
||||
<a id="__codelineno-27-17" name="__codelineno-27-17" href="#__codelineno-27-17"></a><span class="n">tup</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="o">[</span><span class="mi">12836</span><span class="p">,</span><span class="w"> </span><span class="s1">'小哈'</span><span class="o">]</span>
|
||||
<a id="__codelineno-27-18" name="__codelineno-27-18" href="#__codelineno-27-18"></a><span class="n">hash_tup</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">tup</span><span class="o">.</span><span class="n">hash</span>
|
||||
<a id="__codelineno-27-19" name="__codelineno-27-19" href="#__codelineno-27-19"></a><span class="c1"># 元組 (12836, '小哈') 的雜湊值為 1999544809202288822</span>
|
||||
<a id="__codelineno-27-20" name="__codelineno-27-20" href="#__codelineno-27-20"></a>
|
||||
<a id="__codelineno-27-21" name="__codelineno-27-21" href="#__codelineno-27-21"></a><span class="n">obj</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="no">ListNode</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span>
|
||||
<a id="__codelineno-27-22" name="__codelineno-27-22" href="#__codelineno-27-22"></a><span class="n">hash_obj</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">obj</span><span class="o">.</span><span class="n">hash</span>
|
||||
<a id="__codelineno-27-23" name="__codelineno-27-23" href="#__codelineno-27-23"></a><span class="c1"># 節點物件 #<ListNode:0x000078133140ab70> 的雜湊值為 4302940560806366381</span>
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
|
||||
@ -5076,7 +5076,99 @@
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
<div class="highlight"><span class="filename">hash_map_chaining.rb</span><pre><span></span><code><a id="__codelineno-12-1" name="__codelineno-12-1" href="#__codelineno-12-1"></a><span class="o">[</span><span class="n">class</span><span class="o">]</span><span class="p">{</span><span class="no">HashMapChaining</span><span class="p">}</span><span class="o">-[</span><span class="n">func</span><span class="o">]</span><span class="p">{}</span>
|
||||
<div class="highlight"><span class="filename">hash_map_chaining.rb</span><pre><span></span><code><a id="__codelineno-12-1" name="__codelineno-12-1" href="#__codelineno-12-1"></a><span class="c1">### 鍵式位址雜湊表 ###</span>
|
||||
<a id="__codelineno-12-2" name="__codelineno-12-2" href="#__codelineno-12-2"></a><span class="k">class</span><span class="w"> </span><span class="nc">HashMapChaining</span>
|
||||
<a id="__codelineno-12-3" name="__codelineno-12-3" href="#__codelineno-12-3"></a><span class="w"> </span><span class="c1">### 建構子 ###</span>
|
||||
<a id="__codelineno-12-4" name="__codelineno-12-4" href="#__codelineno-12-4"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">initialize</span>
|
||||
<a id="__codelineno-12-5" name="__codelineno-12-5" href="#__codelineno-12-5"></a><span class="w"> </span><span class="vi">@size</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span><span class="w"> </span><span class="c1"># 鍵值對數量</span>
|
||||
<a id="__codelineno-12-6" name="__codelineno-12-6" href="#__codelineno-12-6"></a><span class="w"> </span><span class="vi">@capacity</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">4</span><span class="w"> </span><span class="c1"># 雜湊表容量</span>
|
||||
<a id="__codelineno-12-7" name="__codelineno-12-7" href="#__codelineno-12-7"></a><span class="w"> </span><span class="vi">@load_thres</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">2</span><span class="o">.</span><span class="mi">0</span><span class="w"> </span><span class="o">/</span><span class="w"> </span><span class="mi">3</span><span class="o">.</span><span class="mi">0</span><span class="w"> </span><span class="c1"># 觸發擴容的負載因子閾值</span>
|
||||
<a id="__codelineno-12-8" name="__codelineno-12-8" href="#__codelineno-12-8"></a><span class="w"> </span><span class="vi">@extend_ratio</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">2</span><span class="w"> </span><span class="c1"># 擴容倍數</span>
|
||||
<a id="__codelineno-12-9" name="__codelineno-12-9" href="#__codelineno-12-9"></a><span class="w"> </span><span class="vi">@buckets</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">Array</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="vi">@capacity</span><span class="p">)</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">[]</span><span class="w"> </span><span class="p">}</span><span class="w"> </span><span class="c1"># 桶陣列</span>
|
||||
<a id="__codelineno-12-10" name="__codelineno-12-10" href="#__codelineno-12-10"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-11" name="__codelineno-12-11" href="#__codelineno-12-11"></a>
|
||||
<a id="__codelineno-12-12" name="__codelineno-12-12" href="#__codelineno-12-12"></a><span class="w"> </span><span class="c1">### 雜湊函式 ###</span>
|
||||
<a id="__codelineno-12-13" name="__codelineno-12-13" href="#__codelineno-12-13"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">hash_func</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-12-14" name="__codelineno-12-14" href="#__codelineno-12-14"></a><span class="w"> </span><span class="n">key</span><span class="w"> </span><span class="o">%</span><span class="w"> </span><span class="vi">@capacity</span>
|
||||
<a id="__codelineno-12-15" name="__codelineno-12-15" href="#__codelineno-12-15"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-16" name="__codelineno-12-16" href="#__codelineno-12-16"></a>
|
||||
<a id="__codelineno-12-17" name="__codelineno-12-17" href="#__codelineno-12-17"></a><span class="w"> </span><span class="c1">### 負載因子 ###</span>
|
||||
<a id="__codelineno-12-18" name="__codelineno-12-18" href="#__codelineno-12-18"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">load_factor</span>
|
||||
<a id="__codelineno-12-19" name="__codelineno-12-19" href="#__codelineno-12-19"></a><span class="w"> </span><span class="vi">@size</span><span class="w"> </span><span class="o">/</span><span class="w"> </span><span class="vi">@capacity</span>
|
||||
<a id="__codelineno-12-20" name="__codelineno-12-20" href="#__codelineno-12-20"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-21" name="__codelineno-12-21" href="#__codelineno-12-21"></a>
|
||||
<a id="__codelineno-12-22" name="__codelineno-12-22" href="#__codelineno-12-22"></a><span class="w"> </span><span class="c1">### 查詢操作 ###</span>
|
||||
<a id="__codelineno-12-23" name="__codelineno-12-23" href="#__codelineno-12-23"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">get</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-12-24" name="__codelineno-12-24" href="#__codelineno-12-24"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">hash_func</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-12-25" name="__codelineno-12-25" href="#__codelineno-12-25"></a><span class="w"> </span><span class="n">bucket</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span>
|
||||
<a id="__codelineno-12-26" name="__codelineno-12-26" href="#__codelineno-12-26"></a><span class="w"> </span><span class="c1"># 走訪桶，若找到 key ，則返回對應 val</span>
|
||||
<a id="__codelineno-12-27" name="__codelineno-12-27" href="#__codelineno-12-27"></a><span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="n">bucket</span>
|
||||
<a id="__codelineno-12-28" name="__codelineno-12-28" href="#__codelineno-12-28"></a><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">val</span><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">key</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="n">key</span>
|
||||
<a id="__codelineno-12-29" name="__codelineno-12-29" href="#__codelineno-12-29"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-30" name="__codelineno-12-30" href="#__codelineno-12-30"></a><span class="w"> </span><span class="c1"># 若未找到 key , 則返回 nil</span>
|
||||
<a id="__codelineno-12-31" name="__codelineno-12-31" href="#__codelineno-12-31"></a><span class="w"> </span><span class="kp">nil</span>
|
||||
<a id="__codelineno-12-32" name="__codelineno-12-32" href="#__codelineno-12-32"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-33" name="__codelineno-12-33" href="#__codelineno-12-33"></a>
|
||||
<a id="__codelineno-12-34" name="__codelineno-12-34" href="#__codelineno-12-34"></a><span class="w"> </span><span class="c1">### 新增操作 ###</span>
|
||||
<a id="__codelineno-12-35" name="__codelineno-12-35" href="#__codelineno-12-35"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">put</span><span class="p">(</span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">val</span><span class="p">)</span>
|
||||
<a id="__codelineno-12-36" name="__codelineno-12-36" href="#__codelineno-12-36"></a><span class="w"> </span><span class="c1"># 當負載因子超過閾值時，執行擴容</span>
|
||||
<a id="__codelineno-12-37" name="__codelineno-12-37" href="#__codelineno-12-37"></a><span class="w"> </span><span class="kp">extend</span><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="n">load_factor</span><span class="w"> </span><span class="o">></span><span class="w"> </span><span class="vi">@load_thres</span>
|
||||
<a id="__codelineno-12-38" name="__codelineno-12-38" href="#__codelineno-12-38"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">hash_func</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-12-39" name="__codelineno-12-39" href="#__codelineno-12-39"></a><span class="w"> </span><span class="n">bucket</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span>
|
||||
<a id="__codelineno-12-40" name="__codelineno-12-40" href="#__codelineno-12-40"></a><span class="w"> </span><span class="c1"># 走訪桶，若遇到指定 key ，則更新對應 val 並返回</span>
|
||||
<a id="__codelineno-12-41" name="__codelineno-12-41" href="#__codelineno-12-41"></a><span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="n">bucket</span>
|
||||
<a id="__codelineno-12-42" name="__codelineno-12-42" href="#__codelineno-12-42"></a><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">key</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="n">key</span>
|
||||
<a id="__codelineno-12-43" name="__codelineno-12-43" href="#__codelineno-12-43"></a><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">val</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">val</span>
|
||||
<a id="__codelineno-12-44" name="__codelineno-12-44" href="#__codelineno-12-44"></a><span class="w"> </span><span class="k">return</span>
|
||||
<a id="__codelineno-12-45" name="__codelineno-12-45" href="#__codelineno-12-45"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-46" name="__codelineno-12-46" href="#__codelineno-12-46"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-47" name="__codelineno-12-47" href="#__codelineno-12-47"></a><span class="w"> </span><span class="c1"># 若無該 key ，則將鍵值對新增至尾部</span>
|
||||
<a id="__codelineno-12-48" name="__codelineno-12-48" href="#__codelineno-12-48"></a><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="no">Pair</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">val</span><span class="p">)</span>
|
||||
<a id="__codelineno-12-49" name="__codelineno-12-49" href="#__codelineno-12-49"></a><span class="w"> </span><span class="n">bucket</span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="n">pair</span>
|
||||
<a id="__codelineno-12-50" name="__codelineno-12-50" href="#__codelineno-12-50"></a><span class="w"> </span><span class="vi">@size</span><span class="w"> </span><span class="o">+=</span><span class="w"> </span><span class="mi">1</span>
|
||||
<a id="__codelineno-12-51" name="__codelineno-12-51" href="#__codelineno-12-51"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-52" name="__codelineno-12-52" href="#__codelineno-12-52"></a>
|
||||
<a id="__codelineno-12-53" name="__codelineno-12-53" href="#__codelineno-12-53"></a><span class="w"> </span><span class="c1">### 刪除操作 ###</span>
|
||||
<a id="__codelineno-12-54" name="__codelineno-12-54" href="#__codelineno-12-54"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">remove</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-12-55" name="__codelineno-12-55" href="#__codelineno-12-55"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">hash_func</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-12-56" name="__codelineno-12-56" href="#__codelineno-12-56"></a><span class="w"> </span><span class="n">bucket</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span>
|
||||
<a id="__codelineno-12-57" name="__codelineno-12-57" href="#__codelineno-12-57"></a><span class="w"> </span><span class="c1"># 走訪桶，從中刪除鍵值對</span>
|
||||
<a id="__codelineno-12-58" name="__codelineno-12-58" href="#__codelineno-12-58"></a><span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="n">bucket</span>
|
||||
<a id="__codelineno-12-59" name="__codelineno-12-59" href="#__codelineno-12-59"></a><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">key</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="n">key</span>
|
||||
<a id="__codelineno-12-60" name="__codelineno-12-60" href="#__codelineno-12-60"></a><span class="w"> </span><span class="n">bucket</span><span class="o">.</span><span class="n">delete</span><span class="p">(</span><span class="n">pair</span><span class="p">)</span>
|
||||
<a id="__codelineno-12-61" name="__codelineno-12-61" href="#__codelineno-12-61"></a><span class="w"> </span><span class="vi">@size</span><span class="w"> </span><span class="o">-=</span><span class="w"> </span><span class="mi">1</span>
|
||||
<a id="__codelineno-12-62" name="__codelineno-12-62" href="#__codelineno-12-62"></a><span class="w"> </span><span class="k">break</span>
|
||||
<a id="__codelineno-12-63" name="__codelineno-12-63" href="#__codelineno-12-63"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-64" name="__codelineno-12-64" href="#__codelineno-12-64"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-65" name="__codelineno-12-65" href="#__codelineno-12-65"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-66" name="__codelineno-12-66" href="#__codelineno-12-66"></a>
|
||||
<a id="__codelineno-12-67" name="__codelineno-12-67" href="#__codelineno-12-67"></a><span class="w"> </span><span class="c1">### 擴容雜湊表 ###</span>
|
||||
<a id="__codelineno-12-68" name="__codelineno-12-68" href="#__codelineno-12-68"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">extend</span>
|
||||
<a id="__codelineno-12-69" name="__codelineno-12-69" href="#__codelineno-12-69"></a><span class="w"> </span><span class="c1"># 暫存原雜湊表</span>
|
||||
<a id="__codelineno-12-70" name="__codelineno-12-70" href="#__codelineno-12-70"></a><span class="w"> </span><span class="n">buckets</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="vi">@buckets</span>
|
||||
<a id="__codelineno-12-71" name="__codelineno-12-71" href="#__codelineno-12-71"></a><span class="w"> </span><span class="c1"># 初始化擴容後的新雜湊表</span>
|
||||
<a id="__codelineno-12-72" name="__codelineno-12-72" href="#__codelineno-12-72"></a><span class="w"> </span><span class="vi">@capacity</span><span class="w"> </span><span class="o">*=</span><span class="w"> </span><span class="vi">@extend_ratio</span>
|
||||
<a id="__codelineno-12-73" name="__codelineno-12-73" href="#__codelineno-12-73"></a><span class="w"> </span><span class="vi">@buckets</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">Array</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="vi">@capacity</span><span class="p">)</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">[]</span><span class="w"> </span><span class="p">}</span>
|
||||
<a id="__codelineno-12-74" name="__codelineno-12-74" href="#__codelineno-12-74"></a><span class="w"> </span><span class="vi">@size</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span>
|
||||
<a id="__codelineno-12-75" name="__codelineno-12-75" href="#__codelineno-12-75"></a><span class="w"> </span><span class="c1"># 將鍵值對從原雜湊表搬運至新雜湊表</span>
|
||||
<a id="__codelineno-12-76" name="__codelineno-12-76" href="#__codelineno-12-76"></a><span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="n">bucket</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="n">buckets</span>
|
||||
<a id="__codelineno-12-77" name="__codelineno-12-77" href="#__codelineno-12-77"></a><span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="n">bucket</span>
|
||||
<a id="__codelineno-12-78" name="__codelineno-12-78" href="#__codelineno-12-78"></a><span class="w"> </span><span class="n">put</span><span class="p">(</span><span class="n">pair</span><span class="o">.</span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">val</span><span class="p">)</span>
|
||||
<a id="__codelineno-12-79" name="__codelineno-12-79" href="#__codelineno-12-79"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-80" name="__codelineno-12-80" href="#__codelineno-12-80"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-81" name="__codelineno-12-81" href="#__codelineno-12-81"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-82" name="__codelineno-12-82" href="#__codelineno-12-82"></a>
|
||||
<a id="__codelineno-12-83" name="__codelineno-12-83" href="#__codelineno-12-83"></a><span class="w"> </span><span class="c1">### 列印雜湊表 ###</span>
|
||||
<a id="__codelineno-12-84" name="__codelineno-12-84" href="#__codelineno-12-84"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">print</span>
|
||||
<a id="__codelineno-12-85" name="__codelineno-12-85" href="#__codelineno-12-85"></a><span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="n">bucket</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="vi">@buckets</span>
|
||||
<a id="__codelineno-12-86" name="__codelineno-12-86" href="#__codelineno-12-86"></a><span class="w"> </span><span class="n">res</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="o">[]</span>
|
||||
<a id="__codelineno-12-87" name="__codelineno-12-87" href="#__codelineno-12-87"></a><span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="n">bucket</span>
|
||||
<a id="__codelineno-12-88" name="__codelineno-12-88" href="#__codelineno-12-88"></a><span class="w"> </span><span class="n">res</span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="s2">"</span><span class="si">#{</span><span class="n">pair</span><span class="o">.</span><span class="n">key</span><span class="si">}</span><span class="s2"> -> </span><span class="si">#{</span><span class="n">pair</span><span class="o">.</span><span class="n">val</span><span class="si">}</span><span class="s2">"</span>
|
||||
<a id="__codelineno-12-89" name="__codelineno-12-89" href="#__codelineno-12-89"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-90" name="__codelineno-12-90" href="#__codelineno-12-90"></a><span class="w"> </span><span class="n">pp</span><span class="w"> </span><span class="n">res</span>
|
||||
<a id="__codelineno-12-91" name="__codelineno-12-91" href="#__codelineno-12-91"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-92" name="__codelineno-12-92" href="#__codelineno-12-92"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-12-93" name="__codelineno-12-93" href="#__codelineno-12-93"></a><span class="k">end</span>
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
@ -6698,7 +6790,118 @@
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
<div class="highlight"><span class="filename">hash_map_open_addressing.rb</span><pre><span></span><code><a id="__codelineno-26-1" name="__codelineno-26-1" href="#__codelineno-26-1"></a><span class="o">[</span><span class="n">class</span><span class="o">]</span><span class="p">{</span><span class="no">HashMapOpenAddressing</span><span class="p">}</span><span class="o">-[</span><span class="n">func</span><span class="o">]</span><span class="p">{}</span>
|
||||
<div class="highlight"><span class="filename">hash_map_open_addressing.rb</span><pre><span></span><code><a id="__codelineno-26-1" name="__codelineno-26-1" href="#__codelineno-26-1"></a><span class="c1">### 開放定址雜湊表 ###</span>
|
||||
<a id="__codelineno-26-2" name="__codelineno-26-2" href="#__codelineno-26-2"></a><span class="k">class</span><span class="w"> </span><span class="nc">HashMapOpenAddressing</span>
|
||||
<a id="__codelineno-26-3" name="__codelineno-26-3" href="#__codelineno-26-3"></a><span class="w"> </span><span class="no">TOMBSTONE</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="no">Pair</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="o">-</span><span class="mi">1</span><span class="p">,</span><span class="w"> </span><span class="s1">'-1'</span><span class="p">)</span><span class="w"> </span><span class="c1"># 刪除標記</span>
|
||||
<a id="__codelineno-26-4" name="__codelineno-26-4" href="#__codelineno-26-4"></a>
|
||||
<a id="__codelineno-26-5" name="__codelineno-26-5" href="#__codelineno-26-5"></a><span class="w"> </span><span class="c1">### 建構子 ###</span>
|
||||
<a id="__codelineno-26-6" name="__codelineno-26-6" href="#__codelineno-26-6"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">initialize</span>
|
||||
<a id="__codelineno-26-7" name="__codelineno-26-7" href="#__codelineno-26-7"></a><span class="w"> </span><span class="vi">@size</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span><span class="w"> </span><span class="c1"># 鍵值對數量</span>
|
||||
<a id="__codelineno-26-8" name="__codelineno-26-8" href="#__codelineno-26-8"></a><span class="w"> </span><span class="vi">@capacity</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">4</span><span class="w"> </span><span class="c1"># 雜湊表容量</span>
|
||||
<a id="__codelineno-26-9" name="__codelineno-26-9" href="#__codelineno-26-9"></a><span class="w"> </span><span class="vi">@load_thres</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">2</span><span class="o">.</span><span class="mi">0</span><span class="w"> </span><span class="o">/</span><span class="w"> </span><span class="mi">3</span><span class="o">.</span><span class="mi">0</span><span class="w"> </span><span class="c1"># 觸發擴容的負載因子閾值</span>
|
||||
<a id="__codelineno-26-10" name="__codelineno-26-10" href="#__codelineno-26-10"></a><span class="w"> </span><span class="vi">@extend_ratio</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">2</span><span class="w"> </span><span class="c1"># 擴容倍數</span>
|
||||
<a id="__codelineno-26-11" name="__codelineno-26-11" href="#__codelineno-26-11"></a><span class="w"> </span><span class="vi">@buckets</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">Array</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="vi">@capacity</span><span class="p">)</span><span class="w"> </span><span class="c1"># 桶陣列</span>
|
||||
<a id="__codelineno-26-12" name="__codelineno-26-12" href="#__codelineno-26-12"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-13" name="__codelineno-26-13" href="#__codelineno-26-13"></a>
|
||||
<a id="__codelineno-26-14" name="__codelineno-26-14" href="#__codelineno-26-14"></a><span class="w"> </span><span class="c1">### 雜湊函式 ###</span>
|
||||
<a id="__codelineno-26-15" name="__codelineno-26-15" href="#__codelineno-26-15"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">hash_func</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-16" name="__codelineno-26-16" href="#__codelineno-26-16"></a><span class="w"> </span><span class="n">key</span><span class="w"> </span><span class="o">%</span><span class="w"> </span><span class="vi">@capacity</span>
|
||||
<a id="__codelineno-26-17" name="__codelineno-26-17" href="#__codelineno-26-17"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-18" name="__codelineno-26-18" href="#__codelineno-26-18"></a>
|
||||
<a id="__codelineno-26-19" name="__codelineno-26-19" href="#__codelineno-26-19"></a><span class="w"> </span><span class="c1">### 負載因子 ###</span>
|
||||
<a id="__codelineno-26-20" name="__codelineno-26-20" href="#__codelineno-26-20"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">load_factor</span>
|
||||
<a id="__codelineno-26-21" name="__codelineno-26-21" href="#__codelineno-26-21"></a><span class="w"> </span><span class="vi">@size</span><span class="w"> </span><span class="o">/</span><span class="w"> </span><span class="vi">@capacity</span>
|
||||
<a id="__codelineno-26-22" name="__codelineno-26-22" href="#__codelineno-26-22"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-23" name="__codelineno-26-23" href="#__codelineno-26-23"></a>
|
||||
<a id="__codelineno-26-24" name="__codelineno-26-24" href="#__codelineno-26-24"></a><span class="w"> </span><span class="c1">### 搜尋 key 對應的桶索引 ###</span>
|
||||
<a id="__codelineno-26-25" name="__codelineno-26-25" href="#__codelineno-26-25"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">find_bucket</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-26" name="__codelineno-26-26" href="#__codelineno-26-26"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">hash_func</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-27" name="__codelineno-26-27" href="#__codelineno-26-27"></a><span class="w"> </span><span class="n">first_tombstone</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="o">-</span><span class="mi">1</span>
|
||||
<a id="__codelineno-26-28" name="__codelineno-26-28" href="#__codelineno-26-28"></a><span class="w"> </span><span class="c1"># 線性探查，當遇到空桶時跳出</span>
|
||||
<a id="__codelineno-26-29" name="__codelineno-26-29" href="#__codelineno-26-29"></a><span class="w"> </span><span class="k">while</span><span class="w"> </span><span class="o">!</span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">].</span><span class="n">nil?</span>
|
||||
<a id="__codelineno-26-30" name="__codelineno-26-30" href="#__codelineno-26-30"></a><span class="w"> </span><span class="c1"># 若遇到 key ，返回對應的桶索引</span>
|
||||
<a id="__codelineno-26-31" name="__codelineno-26-31" href="#__codelineno-26-31"></a><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">].</span><span class="n">key</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="n">key</span>
|
||||
<a id="__codelineno-26-32" name="__codelineno-26-32" href="#__codelineno-26-32"></a><span class="w"> </span><span class="c1"># 若之前遇到了刪除標記，則將鍵值對移動至該索引處</span>
|
||||
<a id="__codelineno-26-33" name="__codelineno-26-33" href="#__codelineno-26-33"></a><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="n">first_tombstone</span><span class="w"> </span><span class="o">!=</span><span class="w"> </span><span class="o">-</span><span class="mi">1</span>
|
||||
<a id="__codelineno-26-34" name="__codelineno-26-34" href="#__codelineno-26-34"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">first_tombstone</span><span class="o">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span>
|
||||
<a id="__codelineno-26-35" name="__codelineno-26-35" href="#__codelineno-26-35"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="no">TOMBSTONE</span>
|
||||
<a id="__codelineno-26-36" name="__codelineno-26-36" href="#__codelineno-26-36"></a><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">first_tombstone</span><span class="w"> </span><span class="c1"># 返回移動後的桶索引</span>
|
||||
<a id="__codelineno-26-37" name="__codelineno-26-37" href="#__codelineno-26-37"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-38" name="__codelineno-26-38" href="#__codelineno-26-38"></a><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="c1"># 返回桶索引</span>
|
||||
<a id="__codelineno-26-39" name="__codelineno-26-39" href="#__codelineno-26-39"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-40" name="__codelineno-26-40" href="#__codelineno-26-40"></a><span class="w"> </span><span class="c1"># 記錄遇到的首個刪除標記</span>
|
||||
<a id="__codelineno-26-41" name="__codelineno-26-41" href="#__codelineno-26-41"></a><span class="w"> </span><span class="n">first_tombstone</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="n">first_tombstone</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="o">-</span><span class="mi">1</span><span class="w"> </span><span class="o">&&</span><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="no">TOMBSTONE</span>
|
||||
<a id="__codelineno-26-42" name="__codelineno-26-42" href="#__codelineno-26-42"></a><span class="w"> </span><span class="c1"># 計算桶索引，越過尾部則返回頭部</span>
|
||||
<a id="__codelineno-26-43" name="__codelineno-26-43" href="#__codelineno-26-43"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="n">index</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="mi">1</span><span class="p">)</span><span class="w"> </span><span class="o">%</span><span class="w"> </span><span class="vi">@capacity</span>
|
||||
<a id="__codelineno-26-44" name="__codelineno-26-44" href="#__codelineno-26-44"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-45" name="__codelineno-26-45" href="#__codelineno-26-45"></a><span class="w"> </span><span class="c1"># 若 key 不存在，則返回新增點的索引</span>
|
||||
<a id="__codelineno-26-46" name="__codelineno-26-46" href="#__codelineno-26-46"></a><span class="w"> </span><span class="n">first_tombstone</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="o">-</span><span class="mi">1</span><span class="w"> </span><span class="o">?</span><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="p">:</span><span class="w"> </span><span class="n">first_tombstone</span>
|
||||
<a id="__codelineno-26-47" name="__codelineno-26-47" href="#__codelineno-26-47"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-48" name="__codelineno-26-48" href="#__codelineno-26-48"></a>
|
||||
<a id="__codelineno-26-49" name="__codelineno-26-49" href="#__codelineno-26-49"></a><span class="w"> </span><span class="c1">### 查詢操作 ###</span>
|
||||
<a id="__codelineno-26-50" name="__codelineno-26-50" href="#__codelineno-26-50"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">get</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-51" name="__codelineno-26-51" href="#__codelineno-26-51"></a><span class="w"> </span><span class="c1"># 搜尋 key 對應的桶索引</span>
|
||||
<a id="__codelineno-26-52" name="__codelineno-26-52" href="#__codelineno-26-52"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">find_bucket</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-53" name="__codelineno-26-53" href="#__codelineno-26-53"></a><span class="w"> </span><span class="c1"># 若找到鍵值對，則返回對應 val</span>
|
||||
<a id="__codelineno-26-54" name="__codelineno-26-54" href="#__codelineno-26-54"></a><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">].</span><span class="n">val</span><span class="w"> </span><span class="k">unless</span><span class="w"> </span><span class="o">[</span><span class="kp">nil</span><span class="p">,</span><span class="w"> </span><span class="no">TOMBSTONE</span><span class="o">].</span><span class="n">include?</span><span class="p">(</span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-55" name="__codelineno-26-55" href="#__codelineno-26-55"></a><span class="w"> </span><span class="c1"># 若鍵值對不存在，則返回 nil</span>
|
||||
<a id="__codelineno-26-56" name="__codelineno-26-56" href="#__codelineno-26-56"></a><span class="w"> </span><span class="kp">nil</span>
|
||||
<a id="__codelineno-26-57" name="__codelineno-26-57" href="#__codelineno-26-57"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-58" name="__codelineno-26-58" href="#__codelineno-26-58"></a>
|
||||
<a id="__codelineno-26-59" name="__codelineno-26-59" href="#__codelineno-26-59"></a><span class="w"> </span><span class="c1">### 新增操作 ###</span>
|
||||
<a id="__codelineno-26-60" name="__codelineno-26-60" href="#__codelineno-26-60"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">put</span><span class="p">(</span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">val</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-61" name="__codelineno-26-61" href="#__codelineno-26-61"></a><span class="w"> </span><span class="c1"># 當負載因子超過閾值時，執行擴容</span>
|
||||
<a id="__codelineno-26-62" name="__codelineno-26-62" href="#__codelineno-26-62"></a><span class="w"> </span><span class="kp">extend</span><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="n">load_factor</span><span class="w"> </span><span class="o">></span><span class="w"> </span><span class="vi">@load_thres</span>
|
||||
<a id="__codelineno-26-63" name="__codelineno-26-63" href="#__codelineno-26-63"></a><span class="w"> </span><span class="c1"># 搜尋 key 對應的桶索引</span>
|
||||
<a id="__codelineno-26-64" name="__codelineno-26-64" href="#__codelineno-26-64"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">find_bucket</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-65" name="__codelineno-26-65" href="#__codelineno-26-65"></a><span class="w"> </span><span class="c1"># 若找到鍵值對，則覆蓋 val 開返回</span>
|
||||
<a id="__codelineno-26-66" name="__codelineno-26-66" href="#__codelineno-26-66"></a><span class="w"> </span><span class="k">unless</span><span class="w"> </span><span class="o">[</span><span class="kp">nil</span><span class="p">,</span><span class="w"> </span><span class="no">TOMBSTONE</span><span class="o">].</span><span class="n">include?</span><span class="p">(</span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-67" name="__codelineno-26-67" href="#__codelineno-26-67"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">].</span><span class="n">val</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">val</span>
|
||||
<a id="__codelineno-26-68" name="__codelineno-26-68" href="#__codelineno-26-68"></a><span class="w"> </span><span class="k">return</span>
|
||||
<a id="__codelineno-26-69" name="__codelineno-26-69" href="#__codelineno-26-69"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-70" name="__codelineno-26-70" href="#__codelineno-26-70"></a><span class="w"> </span><span class="c1"># 若鍵值對不存在，則新增該鍵值對</span>
|
||||
<a id="__codelineno-26-71" name="__codelineno-26-71" href="#__codelineno-26-71"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="no">Pair</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">val</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-72" name="__codelineno-26-72" href="#__codelineno-26-72"></a><span class="w"> </span><span class="vi">@size</span><span class="w"> </span><span class="o">+=</span><span class="w"> </span><span class="mi">1</span>
|
||||
<a id="__codelineno-26-73" name="__codelineno-26-73" href="#__codelineno-26-73"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-74" name="__codelineno-26-74" href="#__codelineno-26-74"></a>
|
||||
<a id="__codelineno-26-75" name="__codelineno-26-75" href="#__codelineno-26-75"></a><span class="w"> </span><span class="c1">### 刪除操作 ###</span>
|
||||
<a id="__codelineno-26-76" name="__codelineno-26-76" href="#__codelineno-26-76"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">remove</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-77" name="__codelineno-26-77" href="#__codelineno-26-77"></a><span class="w"> </span><span class="c1"># 搜尋 key 對應的桶索引</span>
|
||||
<a id="__codelineno-26-78" name="__codelineno-26-78" href="#__codelineno-26-78"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">find_bucket</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-79" name="__codelineno-26-79" href="#__codelineno-26-79"></a><span class="w"> </span><span class="c1"># 若找到鍵值對，則用刪除標記覆蓋它</span>
|
||||
<a id="__codelineno-26-80" name="__codelineno-26-80" href="#__codelineno-26-80"></a><span class="w"> </span><span class="k">unless</span><span class="w"> </span><span class="o">[</span><span class="kp">nil</span><span class="p">,</span><span class="w"> </span><span class="no">TOMBSTONE</span><span class="o">].</span><span class="n">include?</span><span class="p">(</span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-81" name="__codelineno-26-81" href="#__codelineno-26-81"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="no">TOMBSTONE</span>
|
||||
<a id="__codelineno-26-82" name="__codelineno-26-82" href="#__codelineno-26-82"></a><span class="w"> </span><span class="vi">@size</span><span class="w"> </span><span class="o">-=</span><span class="w"> </span><span class="mi">1</span>
|
||||
<a id="__codelineno-26-83" name="__codelineno-26-83" href="#__codelineno-26-83"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-84" name="__codelineno-26-84" href="#__codelineno-26-84"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-85" name="__codelineno-26-85" href="#__codelineno-26-85"></a>
|
||||
<a id="__codelineno-26-86" name="__codelineno-26-86" href="#__codelineno-26-86"></a><span class="w"> </span><span class="c1">### 擴容雜湊表 ###</span>
|
||||
<a id="__codelineno-26-87" name="__codelineno-26-87" href="#__codelineno-26-87"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">extend</span>
|
||||
<a id="__codelineno-26-88" name="__codelineno-26-88" href="#__codelineno-26-88"></a><span class="w"> </span><span class="c1"># 暫存原雜湊表</span>
|
||||
<a id="__codelineno-26-89" name="__codelineno-26-89" href="#__codelineno-26-89"></a><span class="w"> </span><span class="n">buckets_tmp</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="vi">@buckets</span>
|
||||
<a id="__codelineno-26-90" name="__codelineno-26-90" href="#__codelineno-26-90"></a><span class="w"> </span><span class="c1"># 初始化擴容後的新雜湊表</span>
|
||||
<a id="__codelineno-26-91" name="__codelineno-26-91" href="#__codelineno-26-91"></a><span class="w"> </span><span class="vi">@capacity</span><span class="w"> </span><span class="o">*=</span><span class="w"> </span><span class="vi">@extend_ratio</span>
|
||||
<a id="__codelineno-26-92" name="__codelineno-26-92" href="#__codelineno-26-92"></a><span class="w"> </span><span class="vi">@buckets</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">Array</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="vi">@capacity</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-93" name="__codelineno-26-93" href="#__codelineno-26-93"></a><span class="w"> </span><span class="vi">@size</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span>
|
||||
<a id="__codelineno-26-94" name="__codelineno-26-94" href="#__codelineno-26-94"></a><span class="w"> </span><span class="c1"># 將鍵值對從原雜湊表搬運至新雜湊表</span>
|
||||
<a id="__codelineno-26-95" name="__codelineno-26-95" href="#__codelineno-26-95"></a><span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="n">buckets_tmp</span>
|
||||
<a id="__codelineno-26-96" name="__codelineno-26-96" href="#__codelineno-26-96"></a><span class="w"> </span><span class="n">put</span><span class="p">(</span><span class="n">pair</span><span class="o">.</span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">val</span><span class="p">)</span><span class="w"> </span><span class="k">unless</span><span class="w"> </span><span class="o">[</span><span class="kp">nil</span><span class="p">,</span><span class="w"> </span><span class="no">TOMBSTONE</span><span class="o">].</span><span class="n">include?</span><span class="p">(</span><span class="n">pair</span><span class="p">)</span>
|
||||
<a id="__codelineno-26-97" name="__codelineno-26-97" href="#__codelineno-26-97"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-98" name="__codelineno-26-98" href="#__codelineno-26-98"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-99" name="__codelineno-26-99" href="#__codelineno-26-99"></a>
|
||||
<a id="__codelineno-26-100" name="__codelineno-26-100" href="#__codelineno-26-100"></a><span class="w"> </span><span class="c1">### 列印雜湊表 ###</span>
|
||||
<a id="__codelineno-26-101" name="__codelineno-26-101" href="#__codelineno-26-101"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">print</span>
|
||||
<a id="__codelineno-26-102" name="__codelineno-26-102" href="#__codelineno-26-102"></a><span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="vi">@buckets</span>
|
||||
<a id="__codelineno-26-103" name="__codelineno-26-103" href="#__codelineno-26-103"></a><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">nil?</span>
|
||||
<a id="__codelineno-26-104" name="__codelineno-26-104" href="#__codelineno-26-104"></a><span class="w"> </span><span class="nb">puts</span><span class="w"> </span><span class="s2">"Nil"</span>
|
||||
<a id="__codelineno-26-105" name="__codelineno-26-105" href="#__codelineno-26-105"></a><span class="w"> </span><span class="k">elsif</span><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="no">TOMBSTONE</span>
|
||||
<a id="__codelineno-26-106" name="__codelineno-26-106" href="#__codelineno-26-106"></a><span class="w"> </span><span class="nb">puts</span><span class="w"> </span><span class="s2">"TOMBSTONE"</span>
|
||||
<a id="__codelineno-26-107" name="__codelineno-26-107" href="#__codelineno-26-107"></a><span class="w"> </span><span class="k">else</span>
|
||||
<a id="__codelineno-26-108" name="__codelineno-26-108" href="#__codelineno-26-108"></a><span class="w"> </span><span class="nb">puts</span><span class="w"> </span><span class="s2">"</span><span class="si">#{</span><span class="n">pair</span><span class="o">.</span><span class="n">key</span><span class="si">}</span><span class="s2"> -> </span><span class="si">#{</span><span class="n">pair</span><span class="o">.</span><span class="n">val</span><span class="si">}</span><span class="s2">"</span>
|
||||
<a id="__codelineno-26-109" name="__codelineno-26-109" href="#__codelineno-26-109"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-110" name="__codelineno-26-110" href="#__codelineno-26-110"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-111" name="__codelineno-26-111" href="#__codelineno-26-111"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-26-112" name="__codelineno-26-112" href="#__codelineno-26-112"></a><span class="k">end</span>
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
|
||||
@ -3715,9 +3715,9 @@
|
||||
<a id="__codelineno-2-3" name="__codelineno-2-3" href="#__codelineno-2-3"></a>
|
||||
<a id="__codelineno-2-4" name="__codelineno-2-4" href="#__codelineno-2-4"></a><span class="cm">/* 新增操作 */</span>
|
||||
<a id="__codelineno-2-5" name="__codelineno-2-5" href="#__codelineno-2-5"></a><span class="c1">// 在雜湊表中新增鍵值對 (key, value)</span>
|
||||
<a id="__codelineno-2-6" name="__codelineno-2-6" href="#__codelineno-2-6"></a><span class="n">map</span><span class="p">.</span><span class="na">put</span><span class="p">(</span><span class="mi">12836</span><span class="p">,</span><span class="w"> </span><span class="s">"小哈"</span><span class="p">);</span><span class="w"> </span>
|
||||
<a id="__codelineno-2-7" name="__codelineno-2-7" href="#__codelineno-2-7"></a><span class="n">map</span><span class="p">.</span><span class="na">put</span><span class="p">(</span><span class="mi">15937</span><span class="p">,</span><span class="w"> </span><span class="s">"小囉"</span><span class="p">);</span><span class="w"> </span>
|
||||
<a id="__codelineno-2-8" name="__codelineno-2-8" href="#__codelineno-2-8"></a><span class="n">map</span><span class="p">.</span><span class="na">put</span><span class="p">(</span><span class="mi">16750</span><span class="p">,</span><span class="w"> </span><span class="s">"小算"</span><span class="p">);</span><span class="w"> </span>
|
||||
<a id="__codelineno-2-6" name="__codelineno-2-6" href="#__codelineno-2-6"></a><span class="n">map</span><span class="p">.</span><span class="na">put</span><span class="p">(</span><span class="mi">12836</span><span class="p">,</span><span class="w"> </span><span class="s">"小哈"</span><span class="p">);</span>
|
||||
<a id="__codelineno-2-7" name="__codelineno-2-7" href="#__codelineno-2-7"></a><span class="n">map</span><span class="p">.</span><span class="na">put</span><span class="p">(</span><span class="mi">15937</span><span class="p">,</span><span class="w"> </span><span class="s">"小囉"</span><span class="p">);</span>
|
||||
<a id="__codelineno-2-8" name="__codelineno-2-8" href="#__codelineno-2-8"></a><span class="n">map</span><span class="p">.</span><span class="na">put</span><span class="p">(</span><span class="mi">16750</span><span class="p">,</span><span class="w"> </span><span class="s">"小算"</span><span class="p">);</span>
|
||||
<a id="__codelineno-2-9" name="__codelineno-2-9" href="#__codelineno-2-9"></a><span class="n">map</span><span class="p">.</span><span class="na">put</span><span class="p">(</span><span class="mi">13276</span><span class="p">,</span><span class="w"> </span><span class="s">"小法"</span><span class="p">);</span>
|
||||
<a id="__codelineno-2-10" name="__codelineno-2-10" href="#__codelineno-2-10"></a><span class="n">map</span><span class="p">.</span><span class="na">put</span><span class="p">(</span><span class="mi">10583</span><span class="p">,</span><span class="w"> </span><span class="s">"小鴨"</span><span class="p">);</span>
|
||||
<a id="__codelineno-2-11" name="__codelineno-2-11" href="#__codelineno-2-11"></a>
|
||||
@ -3908,7 +3908,24 @@
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
<div class="highlight"><span class="filename">hash_map.rb</span><pre><span></span><code><a id="__codelineno-12-1" name="__codelineno-12-1" href="#__codelineno-12-1"></a>
|
||||
<div class="highlight"><span class="filename">hash_map.rb</span><pre><span></span><code><a id="__codelineno-12-1" name="__codelineno-12-1" href="#__codelineno-12-1"></a><span class="c1"># 初始化雜湊表</span>
|
||||
<a id="__codelineno-12-2" name="__codelineno-12-2" href="#__codelineno-12-2"></a><span class="n">hmap</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">{}</span>
|
||||
<a id="__codelineno-12-3" name="__codelineno-12-3" href="#__codelineno-12-3"></a>
|
||||
<a id="__codelineno-12-4" name="__codelineno-12-4" href="#__codelineno-12-4"></a><span class="c1"># 新增操作</span>
|
||||
<a id="__codelineno-12-5" name="__codelineno-12-5" href="#__codelineno-12-5"></a><span class="c1"># 在雜湊表中新增鍵值對 (key, value)</span>
|
||||
<a id="__codelineno-12-6" name="__codelineno-12-6" href="#__codelineno-12-6"></a><span class="n">hmap</span><span class="o">[</span><span class="mi">12836</span><span class="o">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">"小哈"</span>
|
||||
<a id="__codelineno-12-7" name="__codelineno-12-7" href="#__codelineno-12-7"></a><span class="n">hmap</span><span class="o">[</span><span class="mi">15937</span><span class="o">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">"小囉"</span>
|
||||
<a id="__codelineno-12-8" name="__codelineno-12-8" href="#__codelineno-12-8"></a><span class="n">hmap</span><span class="o">[</span><span class="mi">16750</span><span class="o">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">"小算"</span>
|
||||
<a id="__codelineno-12-9" name="__codelineno-12-9" href="#__codelineno-12-9"></a><span class="n">hmap</span><span class="o">[</span><span class="mi">13276</span><span class="o">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">"小法"</span>
|
||||
<a id="__codelineno-12-10" name="__codelineno-12-10" href="#__codelineno-12-10"></a><span class="n">hmap</span><span class="o">[</span><span class="mi">10583</span><span class="o">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">"小鴨"</span>
|
||||
<a id="__codelineno-12-11" name="__codelineno-12-11" href="#__codelineno-12-11"></a>
|
||||
<a id="__codelineno-12-12" name="__codelineno-12-12" href="#__codelineno-12-12"></a><span class="c1"># 查詢操作</span>
|
||||
<a id="__codelineno-12-13" name="__codelineno-12-13" href="#__codelineno-12-13"></a><span class="c1"># 向雜湊表中輸入鍵 key ，得到值 value</span>
|
||||
<a id="__codelineno-12-14" name="__codelineno-12-14" href="#__codelineno-12-14"></a><span class="nb">name</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">hmap</span><span class="o">[</span><span class="mi">15937</span><span class="o">]</span>
|
||||
<a id="__codelineno-12-15" name="__codelineno-12-15" href="#__codelineno-12-15"></a>
|
||||
<a id="__codelineno-12-16" name="__codelineno-12-16" href="#__codelineno-12-16"></a><span class="c1"># 刪除操作</span>
|
||||
<a id="__codelineno-12-17" name="__codelineno-12-17" href="#__codelineno-12-17"></a><span class="c1"># 在雜湊表中刪除鍵值對 (key, value)</span>
|
||||
<a id="__codelineno-12-18" name="__codelineno-12-18" href="#__codelineno-12-18"></a><span class="n">hmap</span><span class="o">.</span><span class="n">delete</span><span class="p">(</span><span class="mi">10583</span><span class="p">)</span>
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
@ -4073,7 +4090,7 @@
|
||||
<a id="__codelineno-23-6" name="__codelineno-23-6" href="#__codelineno-23-6"></a>
|
||||
<a id="__codelineno-23-7" name="__codelineno-23-7" href="#__codelineno-23-7"></a><span class="c1">// 單獨走訪鍵 Key</span>
|
||||
<a id="__codelineno-23-8" name="__codelineno-23-8" href="#__codelineno-23-8"></a><span class="k">for</span><span class="w"> </span><span class="n">key</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="n">map</span><span class="p">.</span><span class="n">keys</span><span class="p">()</span><span class="w"> </span><span class="p">{</span>
|
||||
<a id="__codelineno-23-9" name="__codelineno-23-9" href="#__codelineno-23-9"></a><span class="w"> </span><span class="fm">println!</span><span class="p">(</span><span class="s">"{key}"</span><span class="p">);</span><span class="w"> </span>
|
||||
<a id="__codelineno-23-9" name="__codelineno-23-9" href="#__codelineno-23-9"></a><span class="w"> </span><span class="fm">println!</span><span class="p">(</span><span class="s">"{key}"</span><span class="p">);</span>
|
||||
<a id="__codelineno-23-10" name="__codelineno-23-10" href="#__codelineno-23-10"></a><span class="p">}</span>
|
||||
<a id="__codelineno-23-11" name="__codelineno-23-11" href="#__codelineno-23-11"></a>
|
||||
<a id="__codelineno-23-12" name="__codelineno-23-12" href="#__codelineno-23-12"></a><span class="c1">// 單獨走訪值 Value</span>
|
||||
@ -4103,7 +4120,15 @@
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
<div class="highlight"><span class="filename">hash_map.rb</span><pre><span></span><code><a id="__codelineno-26-1" name="__codelineno-26-1" href="#__codelineno-26-1"></a>
|
||||
<div class="highlight"><span class="filename">hash_map.rb</span><pre><span></span><code><a id="__codelineno-26-1" name="__codelineno-26-1" href="#__codelineno-26-1"></a><span class="c1"># 走訪雜湊表</span>
|
||||
<a id="__codelineno-26-2" name="__codelineno-26-2" href="#__codelineno-26-2"></a><span class="c1"># 走訪鍵值對 key->value</span>
|
||||
<a id="__codelineno-26-3" name="__codelineno-26-3" href="#__codelineno-26-3"></a><span class="n">hmap</span><span class="o">.</span><span class="n">entries</span><span class="o">.</span><span class="n">each</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">|</span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">value</span><span class="o">|</span><span class="w"> </span><span class="nb">puts</span><span class="w"> </span><span class="s2">"</span><span class="si">#{</span><span class="n">key</span><span class="si">}</span><span class="s2"> -> </span><span class="si">#{</span><span class="n">value</span><span class="si">}</span><span class="s2">"</span><span class="w"> </span><span class="p">}</span>
|
||||
<a id="__codelineno-26-4" name="__codelineno-26-4" href="#__codelineno-26-4"></a>
|
||||
<a id="__codelineno-26-5" name="__codelineno-26-5" href="#__codelineno-26-5"></a><span class="c1"># 單獨走訪鍵 key</span>
|
||||
<a id="__codelineno-26-6" name="__codelineno-26-6" href="#__codelineno-26-6"></a><span class="n">hmap</span><span class="o">.</span><span class="n">keys</span><span class="o">.</span><span class="n">each</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">|</span><span class="n">key</span><span class="o">|</span><span class="w"> </span><span class="nb">puts</span><span class="w"> </span><span class="n">key</span><span class="w"> </span><span class="p">}</span>
|
||||
<a id="__codelineno-26-7" name="__codelineno-26-7" href="#__codelineno-26-7"></a>
|
||||
<a id="__codelineno-26-8" name="__codelineno-26-8" href="#__codelineno-26-8"></a><span class="c1"># 單獨走訪值 value</span>
|
||||
<a id="__codelineno-26-9" name="__codelineno-26-9" href="#__codelineno-26-9"></a><span class="n">hmap</span><span class="o">.</span><span class="n">values</span><span class="o">.</span><span class="n">each</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">|</span><span class="n">val</span><span class="o">|</span><span class="w"> </span><span class="nb">puts</span><span class="w"> </span><span class="n">val</span><span class="w"> </span><span class="p">}</span>
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
@ -5213,9 +5238,78 @@
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
<div class="highlight"><span class="filename">array_hash_map.rb</span><pre><span></span><code><a id="__codelineno-41-1" name="__codelineno-41-1" href="#__codelineno-41-1"></a><span class="o">[</span><span class="n">class</span><span class="o">]</span><span class="p">{</span><span class="no">Pair</span><span class="p">}</span><span class="o">-[</span><span class="n">func</span><span class="o">]</span><span class="p">{}</span>
|
||||
<a id="__codelineno-41-2" name="__codelineno-41-2" href="#__codelineno-41-2"></a>
|
||||
<a id="__codelineno-41-3" name="__codelineno-41-3" href="#__codelineno-41-3"></a><span class="o">[</span><span class="n">class</span><span class="o">]</span><span class="p">{</span><span class="no">ArrayHashMap</span><span class="p">}</span><span class="o">-[</span><span class="n">func</span><span class="o">]</span><span class="p">{}</span>
|
||||
<div class="highlight"><span class="filename">array_hash_map.rb</span><pre><span></span><code><a id="__codelineno-41-1" name="__codelineno-41-1" href="#__codelineno-41-1"></a><span class="c1">### 鍵值對 ###</span>
|
||||
<a id="__codelineno-41-2" name="__codelineno-41-2" href="#__codelineno-41-2"></a><span class="k">class</span><span class="w"> </span><span class="nc">Pair</span>
|
||||
<a id="__codelineno-41-3" name="__codelineno-41-3" href="#__codelineno-41-3"></a><span class="w"> </span><span class="kp">attr_accessor</span><span class="w"> </span><span class="ss">:key</span><span class="p">,</span><span class="w"> </span><span class="ss">:val</span>
|
||||
<a id="__codelineno-41-4" name="__codelineno-41-4" href="#__codelineno-41-4"></a>
|
||||
<a id="__codelineno-41-5" name="__codelineno-41-5" href="#__codelineno-41-5"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">initialize</span><span class="p">(</span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">val</span><span class="p">)</span>
|
||||
<a id="__codelineno-41-6" name="__codelineno-41-6" href="#__codelineno-41-6"></a><span class="w"> </span><span class="vi">@key</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">key</span>
|
||||
<a id="__codelineno-41-7" name="__codelineno-41-7" href="#__codelineno-41-7"></a><span class="w"> </span><span class="vi">@val</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">val</span>
|
||||
<a id="__codelineno-41-8" name="__codelineno-41-8" href="#__codelineno-41-8"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-41-9" name="__codelineno-41-9" href="#__codelineno-41-9"></a><span class="k">end</span>
|
||||
<a id="__codelineno-41-10" name="__codelineno-41-10" href="#__codelineno-41-10"></a>
|
||||
<a id="__codelineno-41-11" name="__codelineno-41-11" href="#__codelineno-41-11"></a><span class="c1">### 基於陣列實現的雜湊表 ###</span>
|
||||
<a id="__codelineno-41-12" name="__codelineno-41-12" href="#__codelineno-41-12"></a><span class="k">class</span><span class="w"> </span><span class="nc">ArrayHashMap</span>
|
||||
<a id="__codelineno-41-13" name="__codelineno-41-13" href="#__codelineno-41-13"></a><span class="w"> </span><span class="c1">### 建構子 ###</span>
|
||||
<a id="__codelineno-41-14" name="__codelineno-41-14" href="#__codelineno-41-14"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">initialize</span>
|
||||
<a id="__codelineno-41-15" name="__codelineno-41-15" href="#__codelineno-41-15"></a><span class="w"> </span><span class="c1"># 初始化陣列，包含 100 個桶</span>
|
||||
<a id="__codelineno-41-16" name="__codelineno-41-16" href="#__codelineno-41-16"></a><span class="w"> </span><span class="vi">@buckets</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">Array</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="mi">100</span><span class="p">)</span>
|
||||
<a id="__codelineno-41-17" name="__codelineno-41-17" href="#__codelineno-41-17"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-41-18" name="__codelineno-41-18" href="#__codelineno-41-18"></a>
|
||||
<a id="__codelineno-41-19" name="__codelineno-41-19" href="#__codelineno-41-19"></a><span class="w"> </span><span class="c1">### 雜湊函式 ###</span>
|
||||
<a id="__codelineno-41-20" name="__codelineno-41-20" href="#__codelineno-41-20"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">hash_func</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-41-21" name="__codelineno-41-21" href="#__codelineno-41-21"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">key</span><span class="w"> </span><span class="o">%</span><span class="w"> </span><span class="mi">100</span>
|
||||
<a id="__codelineno-41-22" name="__codelineno-41-22" href="#__codelineno-41-22"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-41-23" name="__codelineno-41-23" href="#__codelineno-41-23"></a>
|
||||
<a id="__codelineno-41-24" name="__codelineno-41-24" href="#__codelineno-41-24"></a><span class="w"> </span><span class="c1">### 查詢操作 ###</span>
|
||||
<a id="__codelineno-41-25" name="__codelineno-41-25" href="#__codelineno-41-25"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">get</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-41-26" name="__codelineno-41-26" href="#__codelineno-41-26"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">hash_func</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-41-27" name="__codelineno-41-27" href="#__codelineno-41-27"></a><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span>
|
||||
<a id="__codelineno-41-28" name="__codelineno-41-28" href="#__codelineno-41-28"></a>
|
||||
<a id="__codelineno-41-29" name="__codelineno-41-29" href="#__codelineno-41-29"></a><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">nil?</span>
|
||||
<a id="__codelineno-41-30" name="__codelineno-41-30" href="#__codelineno-41-30"></a><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">val</span>
|
||||
<a id="__codelineno-41-31" name="__codelineno-41-31" href="#__codelineno-41-31"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-41-32" name="__codelineno-41-32" href="#__codelineno-41-32"></a>
|
||||
<a id="__codelineno-41-33" name="__codelineno-41-33" href="#__codelineno-41-33"></a><span class="w"> </span><span class="c1">### 新增操作 ###</span>
|
||||
<a id="__codelineno-41-34" name="__codelineno-41-34" href="#__codelineno-41-34"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">put</span><span class="p">(</span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">val</span><span class="p">)</span>
|
||||
<a id="__codelineno-41-35" name="__codelineno-41-35" href="#__codelineno-41-35"></a><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="no">Pair</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">val</span><span class="p">)</span>
|
||||
<a id="__codelineno-41-36" name="__codelineno-41-36" href="#__codelineno-41-36"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">hash_func</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-41-37" name="__codelineno-41-37" href="#__codelineno-41-37"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">pair</span>
|
||||
<a id="__codelineno-41-38" name="__codelineno-41-38" href="#__codelineno-41-38"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-41-39" name="__codelineno-41-39" href="#__codelineno-41-39"></a>
|
||||
<a id="__codelineno-41-40" name="__codelineno-41-40" href="#__codelineno-41-40"></a><span class="w"> </span><span class="c1">### 刪除操作 ###</span>
|
||||
<a id="__codelineno-41-41" name="__codelineno-41-41" href="#__codelineno-41-41"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">remove</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-41-42" name="__codelineno-41-42" href="#__codelineno-41-42"></a><span class="w"> </span><span class="n">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">hash_func</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
|
||||
<a id="__codelineno-41-43" name="__codelineno-41-43" href="#__codelineno-41-43"></a><span class="w"> </span><span class="c1"># 置為 nil ，代表刪除</span>
|
||||
<a id="__codelineno-41-44" name="__codelineno-41-44" href="#__codelineno-41-44"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">[</span><span class="n">index</span><span class="o">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="kp">nil</span>
|
||||
<a id="__codelineno-41-45" name="__codelineno-41-45" href="#__codelineno-41-45"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-41-46" name="__codelineno-41-46" href="#__codelineno-41-46"></a>
|
||||
<a id="__codelineno-41-47" name="__codelineno-41-47" href="#__codelineno-41-47"></a><span class="w"> </span><span class="c1">### 獲取所有鍵值對 ###</span>
|
||||
<a id="__codelineno-41-48" name="__codelineno-41-48" href="#__codelineno-41-48"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">entry_set</span>
|
||||
<a id="__codelineno-41-49" name="__codelineno-41-49" href="#__codelineno-41-49"></a><span class="w"> </span><span class="n">result</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="o">[]</span>
|
||||
<a id="__codelineno-41-50" name="__codelineno-41-50" href="#__codelineno-41-50"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">.</span><span class="n">each</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">|</span><span class="n">pair</span><span class="o">|</span><span class="w"> </span><span class="n">result</span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="n">pair</span><span class="w"> </span><span class="k">unless</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">nil?</span><span class="w"> </span><span class="p">}</span>
|
||||
<a id="__codelineno-41-51" name="__codelineno-41-51" href="#__codelineno-41-51"></a><span class="w"> </span><span class="n">result</span>
|
||||
<a id="__codelineno-41-52" name="__codelineno-41-52" href="#__codelineno-41-52"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-41-53" name="__codelineno-41-53" href="#__codelineno-41-53"></a>
|
||||
<a id="__codelineno-41-54" name="__codelineno-41-54" href="#__codelineno-41-54"></a><span class="w"> </span><span class="c1">### 獲取所有鍵 ###</span>
|
||||
<a id="__codelineno-41-55" name="__codelineno-41-55" href="#__codelineno-41-55"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">key_set</span>
|
||||
<a id="__codelineno-41-56" name="__codelineno-41-56" href="#__codelineno-41-56"></a><span class="w"> </span><span class="n">result</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="o">[]</span>
|
||||
<a id="__codelineno-41-57" name="__codelineno-41-57" href="#__codelineno-41-57"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">.</span><span class="n">each</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">|</span><span class="n">pair</span><span class="o">|</span><span class="w"> </span><span class="n">result</span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">key</span><span class="w"> </span><span class="k">unless</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">nil?</span><span class="w"> </span><span class="p">}</span>
|
||||
<a id="__codelineno-41-58" name="__codelineno-41-58" href="#__codelineno-41-58"></a><span class="w"> </span><span class="n">result</span>
|
||||
<a id="__codelineno-41-59" name="__codelineno-41-59" href="#__codelineno-41-59"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-41-60" name="__codelineno-41-60" href="#__codelineno-41-60"></a>
|
||||
<a id="__codelineno-41-61" name="__codelineno-41-61" href="#__codelineno-41-61"></a><span class="w"> </span><span class="c1">### 獲取所有值 ###</span>
|
||||
<a id="__codelineno-41-62" name="__codelineno-41-62" href="#__codelineno-41-62"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">value_set</span>
|
||||
<a id="__codelineno-41-63" name="__codelineno-41-63" href="#__codelineno-41-63"></a><span class="w"> </span><span class="n">result</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="o">[]</span>
|
||||
<a id="__codelineno-41-64" name="__codelineno-41-64" href="#__codelineno-41-64"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">.</span><span class="n">each</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">|</span><span class="n">pair</span><span class="o">|</span><span class="w"> </span><span class="n">result</span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">val</span><span class="w"> </span><span class="k">unless</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">nil?</span><span class="w"> </span><span class="p">}</span>
|
||||
<a id="__codelineno-41-65" name="__codelineno-41-65" href="#__codelineno-41-65"></a><span class="w"> </span><span class="n">result</span>
|
||||
<a id="__codelineno-41-66" name="__codelineno-41-66" href="#__codelineno-41-66"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-41-67" name="__codelineno-41-67" href="#__codelineno-41-67"></a>
|
||||
<a id="__codelineno-41-68" name="__codelineno-41-68" href="#__codelineno-41-68"></a><span class="w"> </span><span class="c1">### 列印雜湊表 ###</span>
|
||||
<a id="__codelineno-41-69" name="__codelineno-41-69" href="#__codelineno-41-69"></a><span class="w"> </span><span class="k">def</span><span class="w"> </span><span class="nf">print</span>
|
||||
<a id="__codelineno-41-70" name="__codelineno-41-70" href="#__codelineno-41-70"></a><span class="w"> </span><span class="vi">@buckets</span><span class="o">.</span><span class="n">each</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="o">|</span><span class="n">pair</span><span class="o">|</span><span class="w"> </span><span class="nb">puts</span><span class="w"> </span><span class="s2">"</span><span class="si">#{</span><span class="n">pair</span><span class="o">.</span><span class="n">key</span><span class="si">}</span><span class="s2"> -> </span><span class="si">#{</span><span class="n">pair</span><span class="o">.</span><span class="n">val</span><span class="si">}</span><span class="s2">"</span><span class="w"> </span><span class="k">unless</span><span class="w"> </span><span class="n">pair</span><span class="o">.</span><span class="n">nil?</span><span class="w"> </span><span class="p">}</span>
|
||||
<a id="__codelineno-41-71" name="__codelineno-41-71" href="#__codelineno-41-71"></a><span class="w"> </span><span class="k">end</span>
|
||||
<a id="__codelineno-41-72" name="__codelineno-41-72" href="#__codelineno-41-72"></a><span class="k">end</span>
|
||||
</code></pre></div>
|
||||
</div>
|
||||
<div class="tabbed-block">
|
||||
|
||||
@ -4121,7 +4121,7 @@
|
||||
<a id="__codelineno-14-22" name="__codelineno-14-22" href="#__codelineno-14-22"></a>
|
||||
<a id="__codelineno-14-23" name="__codelineno-14-23" href="#__codelineno-14-23"></a> <span class="k">def</span> <span class="nf">is_empty</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="nb">bool</span><span class="p">:</span>
|
||||
<a id="__codelineno-14-24" name="__codelineno-14-24" href="#__codelineno-14-24"></a><span class="w"> </span><span class="sd">"""判斷雙向佇列是否為空"""</span>
|
||||
<a id="__codelineno-14-25" name="__codelineno-14-25" href="#__codelineno-14-25"></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">size</span><span class="p">()</span> <span class="o">==</span> <span class="mi">0</span>
|
||||
<a id="__codelineno-14-25" name="__codelineno-14-25" href="#__codelineno-14-25"></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_size</span> <span class="o">==</span> <span class="mi">0</span>
|
||||
<a id="__codelineno-14-26" name="__codelineno-14-26" href="#__codelineno-14-26"></a>
|
||||
<a id="__codelineno-14-27" name="__codelineno-14-27" href="#__codelineno-14-27"></a> <span class="k">def</span> <span class="nf">push</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">num</span><span class="p">:</span> <span class="nb">int</span><span class="p">,</span> <span class="n">is_front</span><span class="p">:</span> <span class="nb">bool</span><span class="p">):</span>
|
||||
<a id="__codelineno-14-28" name="__codelineno-14-28" href="#__codelineno-14-28"></a><span class="w"> </span><span class="sd">"""入列操作"""</span>
|
||||
|
||||
@ -4064,7 +4064,7 @@
|
||||
<a id="__codelineno-14-13" name="__codelineno-14-13" href="#__codelineno-14-13"></a>
|
||||
<a id="__codelineno-14-14" name="__codelineno-14-14" href="#__codelineno-14-14"></a> <span class="k">def</span> <span class="nf">is_empty</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="nb">bool</span><span class="p">:</span>
|
||||
<a id="__codelineno-14-15" name="__codelineno-14-15" href="#__codelineno-14-15"></a><span class="w"> </span><span class="sd">"""判斷佇列是否為空"""</span>
|
||||
<a id="__codelineno-14-16" name="__codelineno-14-16" href="#__codelineno-14-16"></a> <span class="k">return</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_front</span>
|
||||
<a id="__codelineno-14-16" name="__codelineno-14-16" href="#__codelineno-14-16"></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_size</span> <span class="o">==</span> <span class="mi">0</span>
|
||||
<a id="__codelineno-14-17" name="__codelineno-14-17" href="#__codelineno-14-17"></a>
|
||||
<a id="__codelineno-14-18" name="__codelineno-14-18" href="#__codelineno-14-18"></a> <span class="k">def</span> <span class="nf">push</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">num</span><span class="p">:</span> <span class="nb">int</span><span class="p">):</span>
|
||||
<a id="__codelineno-14-19" name="__codelineno-14-19" href="#__codelineno-14-19"></a><span class="w"> </span><span class="sd">"""入列"""</span>
|
||||
|
||||
@ -4075,7 +4075,7 @@
|
||||
<a id="__codelineno-14-12" name="__codelineno-14-12" href="#__codelineno-14-12"></a>
|
||||
<a id="__codelineno-14-13" name="__codelineno-14-13" href="#__codelineno-14-13"></a> <span class="k">def</span> <span class="nf">is_empty</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="nb">bool</span><span class="p">:</span>
|
||||
<a id="__codelineno-14-14" name="__codelineno-14-14" href="#__codelineno-14-14"></a><span class="w"> </span><span class="sd">"""判斷堆疊是否為空"""</span>
|
||||
<a id="__codelineno-14-15" name="__codelineno-14-15" href="#__codelineno-14-15"></a> <span class="k">return</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_peek</span>
|
||||
<a id="__codelineno-14-15" name="__codelineno-14-15" href="#__codelineno-14-15"></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_size</span> <span class="o">==</span> <span class="mi">0</span>
|
||||
<a id="__codelineno-14-16" name="__codelineno-14-16" href="#__codelineno-14-16"></a>
|
||||
<a id="__codelineno-14-17" name="__codelineno-14-17" href="#__codelineno-14-17"></a> <span class="k">def</span> <span class="nf">push</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">val</span><span class="p">:</span> <span class="nb">int</span><span class="p">):</span>
|
||||
<a id="__codelineno-14-18" name="__codelineno-14-18" href="#__codelineno-14-18"></a><span class="w"> </span><span class="sd">"""入堆疊"""</span>
|
||||
@ -4924,7 +4924,7 @@
|
||||
<a id="__codelineno-28-11" name="__codelineno-28-11" href="#__codelineno-28-11"></a>
|
||||
<a id="__codelineno-28-12" name="__codelineno-28-12" href="#__codelineno-28-12"></a> <span class="k">def</span> <span class="nf">is_empty</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="nb">bool</span><span class="p">:</span>
|
||||
<a id="__codelineno-28-13" name="__codelineno-28-13" href="#__codelineno-28-13"></a><span class="w"> </span><span class="sd">"""判斷堆疊是否為空"""</span>
|
||||
<a id="__codelineno-28-14" name="__codelineno-28-14" href="#__codelineno-28-14"></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_stack</span> <span class="o">==</span> <span class="p">[]</span>
|
||||
<a id="__codelineno-28-14" name="__codelineno-28-14" href="#__codelineno-28-14"></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_size</span> <span class="o">==</span> <span class="mi">0</span>
|
||||
<a id="__codelineno-28-15" name="__codelineno-28-15" href="#__codelineno-28-15"></a>
|
||||
<a id="__codelineno-28-16" name="__codelineno-28-16" href="#__codelineno-28-16"></a> <span class="k">def</span> <span class="nf">push</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">item</span><span class="p">:</span> <span class="nb">int</span><span class="p">):</span>
|
||||
<a id="__codelineno-28-17" name="__codelineno-28-17" href="#__codelineno-28-17"></a><span class="w"> </span><span class="sd">"""入堆疊"""</span>
|
||||
|
||||
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||||
<lastmod>2024-04-14</lastmod>
|
||||
<lastmod>2024-04-15</lastmod>
|
||||
<changefreq>daily</changefreq>
|
||||
</url>
|
||||
<url>
|
||||
<loc>https://www.hello-algo.com/zh-hant/chapter_stack_and_queue/queue/</loc>
|
||||
<lastmod>2024-04-14</lastmod>
|
||||
<lastmod>2024-04-15</lastmod>
|
||||
<changefreq>daily</changefreq>
|
||||
</url>
|
||||
<url>
|
||||
<loc>https://www.hello-algo.com/zh-hant/chapter_stack_and_queue/stack/</loc>
|
||||
<lastmod>2024-04-14</lastmod>
|
||||
<lastmod>2024-04-15</lastmod>
|
||||
<changefreq>daily</changefreq>
|
||||
</url>
|
||||
<url>
|
||||
<loc>https://www.hello-algo.com/zh-hant/chapter_stack_and_queue/summary/</loc>
|
||||
<lastmod>2024-04-14</lastmod>
|
||||
<lastmod>2024-04-15</lastmod>
|
||||
<changefreq>daily</changefreq>
|
||||
</url>
|
||||
<url>
|
||||
<loc>https://www.hello-algo.com/zh-hant/chapter_tree/</loc>
|
||||
<lastmod>2024-04-14</lastmod>
|
||||
<lastmod>2024-04-15</lastmod>
|
||||
<changefreq>daily</changefreq>
|
||||
</url>
|
||||
<url>
|
||||
<loc>https://www.hello-algo.com/zh-hant/chapter_tree/array_representation_of_tree/</loc>
|
||||
<lastmod>2024-04-14</lastmod>
|
||||
<lastmod>2024-04-15</lastmod>
|
||||
<changefreq>daily</changefreq>
|
||||
</url>
|
||||
<url>
|
||||
<loc>https://www.hello-algo.com/zh-hant/chapter_tree/avl_tree/</loc>
|
||||
<lastmod>2024-04-14</lastmod>
|
||||
<lastmod>2024-04-15</lastmod>
|
||||
<changefreq>daily</changefreq>
|
||||
</url>
|
||||
<url>
|
||||
<loc>https://www.hello-algo.com/zh-hant/chapter_tree/binary_search_tree/</loc>
|
||||
<lastmod>2024-04-14</lastmod>
|
||||
<lastmod>2024-04-15</lastmod>
|
||||
<changefreq>daily</changefreq>
|
||||
</url>
|
||||
<url>
|
||||
<loc>https://www.hello-algo.com/zh-hant/chapter_tree/binary_tree/</loc>
|
||||
<lastmod>2024-04-14</lastmod>
|
||||
<lastmod>2024-04-15</lastmod>
|
||||
<changefreq>daily</changefreq>
|
||||
</url>
|
||||
<url>
|
||||
<loc>https://www.hello-algo.com/zh-hant/chapter_tree/binary_tree_traversal/</loc>
|
||||
<lastmod>2024-04-14</lastmod>
|
||||
<lastmod>2024-04-15</lastmod>
|
||||
<changefreq>daily</changefreq>
|
||||
</url>
|
||||
<url>
|
||||
<loc>https://www.hello-algo.com/zh-hant/chapter_tree/summary/</loc>
|
||||
<lastmod>2024-04-14</lastmod>
|
||||
<lastmod>2024-04-15</lastmod>
|
||||
<changefreq>daily</changefreq>
|
||||
</url>
|
||||
</urlset>
|
||||
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Loading…
Reference in New Issue
Block a user