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2018-06-25
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785 (字)
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<h2 id="https-github-com-damonare-Sorts-这位大兄弟♂总结的很好，快去看看吧！"><a href="#https-github-com-damonare-Sorts-这位大兄弟♂总结的很好，快去看看吧！" class="headerlink" title="https://github.com/damonare/Sorts 这位大兄弟♂总结的很好，快去看看吧！"></a><a href="https://github.com/damonare/Sorts" target="_blank" rel="noopener">https://github.com/damonare/Sorts</a> 这位大兄弟♂总结的很好，快去看看吧！</h2><a id="more"></a>
<h2 id="冒泡排序-两两比较"><a href="#冒泡排序-两两比较" class="headerlink" title="冒泡排序(两两比较)"></a>冒泡排序(两两比较)</h2><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">bubleSort</span>(<span class="params">arr</span>) </span>{</span><br><span class="line"> <span class="keyword">var</span> len = arr.length;</span><br><span class="line"> <span class="keyword">for</span> (<span class="keyword">let</span> outer = len ; outer >= <span class="number">2</span>; outer--) {</span><br><span class="line"> <span class="keyword">for</span>(<span class="keyword">let</span> inner = <span class="number">0</span>; inner <=outer - <span class="number">1</span>; inner++) {</span><br><span class="line"> <span class="keyword">if</span>(arr[inner] > arr[inner + <span class="number">1</span>]) {</span><br><span class="line"> [arr[inner],arr[inner+<span class="number">1</span>]] = [arr[inner+<span class="number">1</span>],arr[inner]]</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">return</span> arr;</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"><span class="comment">// 推荐</span></span><br><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">bubleSort</span>(<span class="params">arr</span>) </span>{</span><br><span class="line"> <span class="keyword">var</span> nLength = arr.length;</span><br><span class="line"></span><br><span class="line"> <span class="keyword">if</span> (nLength < <span class="number">2</span>) {</span><br><span class="line"> <span class="keyword">return</span> arr;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> <span class="keyword">for</span> (<span class="keyword">var</span> i = nLength - <span class="number">1</span>; i > <span class="number">0</span>; --i) {</span><br><span class="line"> <span class="keyword">for</span> (<span class="keyword">var</span> j = <span class="number">0</span>; j < i; ++j) {</span><br><span class="line"> <span class="keyword">if</span> (arr[j] > arr[j + <span class="number">1</span>]) {</span><br><span class="line"> <span class="keyword">var</span> temp = arr[j];</span><br><span class="line"> arr[j] = arr[j + <span class="number">1</span>];</span><br><span class="line"> arr[j + <span class="number">1</span>] = temp;</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">return</span> arr;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<h2 id="选择排序-遍历自身以外的元素，最小的元素和自己调换位置"><a href="#选择排序-遍历自身以外的元素，最小的元素和自己调换位置" class="headerlink" title="选择排序(遍历自身以外的元素，最小的元素和自己调换位置)"></a>选择排序(遍历自身以外的元素，最小的元素和自己调换位置)</h2><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">// 推荐</span></span><br><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">selectSort</span>(<span class="params">arr</span>) </span>{</span><br><span class="line"> <span class="keyword">var</span> len = arr.length;</span><br><span class="line"> <span class="keyword">for</span>(<span class="keyword">let</span> i = <span class="number">0</span> ;i < len - <span class="number">1</span>; i++) {</span><br><span class="line"> <span class="keyword">for</span>(<span class="keyword">let</span> j = i ; j<len; j++) {</span><br><span class="line"> <span class="keyword">if</span>(arr[j] < arr[i]) {</span><br><span class="line"> [arr[i],arr[j]] = [arr[j],arr[i]];</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">return</span> arr</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">selectSort</span>(<span class="params">arr</span>) </span>{</span><br><span class="line"> <span class="keyword">var</span> nLength = arr.length;</span><br><span class="line"> <span class="keyword">if</span> (nLength < <span class="number">2</span>) {</span><br><span class="line"> <span class="keyword">return</span> arr;</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">for</span> (<span class="keyword">var</span> i = <span class="number">0</span>; i < nLength; i++) {</span><br><span class="line"> <span class="keyword">var</span> index = i;</span><br><span class="line"> <span class="keyword">for</span> (<span class="keyword">var</span> j = i + <span class="number">1</span>; j < nLength; j++) {</span><br><span class="line"> <span class="keyword">if</span> (arr[j] < arr[index]) {</span><br><span class="line"> index = j;</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">if</span> (i !== index) {</span><br><span class="line"> <span class="keyword">var</span> temp = arr[i];</span><br><span class="line"> arr[i] = arr[index];</span><br><span class="line"> arr[index] = temp;</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">return</span> arr;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<h2 id="插入排序-将元素插入到已排序好的数组中"><a href="#插入排序-将元素插入到已排序好的数组中" class="headerlink" title="插入排序(将元素插入到已排序好的数组中)"></a>插入排序(将元素插入到已排序好的数组中)</h2><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">insertSort</span>(<span class="params">arr</span>) </span>{</span><br><span class="line"> <span class="keyword">for</span>(<span class="keyword">let</span> i = <span class="number">1</span>; i < arr.length; i++) { </span><br><span class="line"> <span class="comment">// 外循环从1开始，默认arr[0]是有序段</span></span><br><span class="line"> <span class="keyword">for</span>(<span class="keyword">let</span> j = i; j > <span class="number">0</span>; j--) { </span><br><span class="line"> <span class="comment">// j = i,将arr[j]依次插入有序段中</span></span><br><span class="line"> <span class="keyword">if</span>(arr[j] < arr[j<span class="number">-1</span>]) {</span><br><span class="line"> [arr[j],arr[j<span class="number">-1</span>]] = [arr[j<span class="number">-1</span>],arr[j]];</span><br><span class="line"> } <span class="keyword">else</span> {</span><br><span class="line"> <span class="keyword">break</span>;</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">return</span> arr;</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">insertSort</span>(<span class="params">arr</span>) </span>{</span><br><span class="line"> <span class="keyword">var</span> nLength = arr.length;</span><br><span class="line"> <span class="keyword">if</span> (nLength < <span class="number">2</span>) {</span><br><span class="line"> <span class="keyword">return</span> arr;</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">for</span> (<span class="keyword">var</span> i = <span class="number">1</span>; i < nLength; ++i) {</span><br><span class="line"> <span class="keyword">var</span> j = i,</span><br><span class="line"> value = arr[i];</span><br><span class="line"> <span class="keyword">while</span> (j > <span class="number">0</span> && arr[j - <span class="number">1</span>] > value) {</span><br><span class="line"> arr[j] = arr[j - <span class="number">1</span>];</span><br><span class="line"> --j;</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">if</span> (j !== i) {</span><br><span class="line"> arr[j] = value;</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">return</span> arr;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<h3 id="快速排序"><a href="#快速排序" class="headerlink" title="快速排序"></a>快速排序</h3><ul>
<li>选择基准值(base)，原数组长度减一(基准值)，使用 splice</li>
<li>循环原数组，小的放左边(left数组)，大的放右边(right数组);</li>
<li>concat(left, base, right)</li>
<li>递归继续排序 left 与 right</li>
</ul>
<figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">// let mid = arr[arr.length >>> 1]</span></span><br><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">quickSort</span>(<span class="params">arr</span>) </span>{</span><br><span class="line"> <span class="keyword">if</span>(arr.length <= <span class="number">1</span>) {</span><br><span class="line"> <span class="keyword">return</span> arr; <span class="comment">//递归出口</span></span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">var</span> left = [],</span><br><span class="line"> right = [],</span><br><span class="line"> current = arr.splice(<span class="number">0</span>,<span class="number">1</span>); </span><br><span class="line"> <span class="keyword">for</span>(<span class="keyword">let</span> i = <span class="number">0</span>; i < arr.length; i++) {</span><br><span class="line"> <span class="keyword">if</span>(arr[i] < current) {</span><br><span class="line"> left.push(arr[i]) <span class="comment">//放在左边</span></span><br><span class="line"> } <span class="keyword">else</span> {</span><br><span class="line"> right.push(arr[i]) <span class="comment">//放在右边</span></span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">return</span> quickSort(left).concat(current,quickSort(right));</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">quickSort</span>(<span class="params">arr</span>) </span>{</span><br><span class="line"> <span class="keyword">var</span> nLength = arr.length,</span><br><span class="line"> pivotIndex = <span class="built_in">Math</span>.floor(nLength / <span class="number">2</span>),</span><br><span class="line"> pivot = arr.splice(pivotIndex, <span class="number">1</span>)[<span class="number">0</span>],</span><br><span class="line"> left = [],</span><br><span class="line"> right = [];</span><br><span class="line"> <span class="keyword">if</span> (nLength < <span class="number">2</span>) {</span><br><span class="line"> <span class="keyword">return</span> arr;</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">for</span> (<span class="keyword">var</span> i = <span class="number">0</span>; i < arr.length; i++) {</span><br><span class="line"> <span class="keyword">if</span> (arr[i] < pivot) {</span><br><span class="line"> left.push(arr[i]);</span><br><span class="line"> } <span class="keyword">else</span> {</span><br><span class="line"> right.push(arr[i]);</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">return</span> <span class="built_in">arguments</span>.callee(left).concat([pivot], <span class="built_in">arguments</span>.callee(right));</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<h3 id="希尔排序-不定步数的插入排序，插入排序"><a href="#希尔排序-不定步数的插入排序，插入排序" class="headerlink" title="希尔排序(不定步数的插入排序，插入排序)"></a>希尔排序(不定步数的插入排序，插入排序)</h3><blockquote>
<p>插冒归基稳定，快选堆希不稳定
<figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">shellSort</span>(<span class="params">arr</span>)</span>{</span><br><span class="line"> <span class="keyword">var</span> nLength = arr.length;</span><br><span class="line"> <span class="keyword">if</span> (nLength < <span class="number">2</span>) {</span><br><span class="line"> <span class="keyword">return</span> arr;</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">for</span> (<span class="keyword">var</span> step = nLength >> <span class="number">1</span>; step > <span class="number">0</span>; step >>= <span class="number">1</span>) {</span><br><span class="line"> <span class="keyword">for</span> (<span class="keyword">var</span> i = <span class="number">0</span>; i < step; ++i) {</span><br><span class="line"> <span class="keyword">for</span> (<span class="keyword">var</span> j = i + step; j < nLength; j += step) {</span><br><span class="line"> <span class="keyword">var</span> k = j,</span><br><span class="line"> value = arr[j];</span><br><span class="line"> <span class="keyword">while</span> (k >= step && arr[k - step] > value) {</span><br><span class="line"> arr[k] = arr[k - step];</span><br><span class="line"> k -= step;</span><br><span class="line"> }</span><br><span class="line"> arr[k] = value;</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">return</span> arr;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<img src="http://cdn.mydearest.cn/blog/images/sort.png" alt="sort"></p>
</blockquote>
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