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class="sidebar-link">ES5面向对象</a></li><li><a href="/blog/pages/1f4123be6f45abcd/" class="sidebar-link">ES6面向对象</a></li><li><a href="/blog/pages/e808fba1fa8fbab2/" class="sidebar-link">多种数组去重性能对比</a></li><li><a href="/blog/pages/40b4db2d38ba85f2/" aria-current="page" class="active sidebar-link">JS随机打乱数组</a></li><li><a href="/blog/pages/40f623be692cf8bc/" class="sidebar-link">判断是否为移动端浏览器</a></li><li><a href="/blog/pages/f1acb712033ac8da/" class="sidebar-link">将一维数组按指定长度转为二维数组</a></li><li><a href="/blog/pages/0f6a0ac99b62ede5/" class="sidebar-link">防抖与节流函数</a></li><li><a href="/blog/pages/7a91be2d502346ce/" class="sidebar-link">JS获取和修改url参数</a></li><li><a href="/blog/pages/fd4a16d56b83c1bc/" class="sidebar-link">比typeof运算符更准确的类型判断</a></li><li><section class="sidebar-group collapsable is-sub-group depth-1"><p class="sidebar-heading"><span>三级目录</span> <span class="arrow right"></span></p> <!----></section></li></ul></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>学习笔记</span> <span class="arrow right"></span></p> <!----></section></li></ul> </aside> <div><main class="page"><div class="theme-vdoing-wrapper "><div class="articleInfo-wrap" data-v-06970110><div class="articleInfo" data-v-06970110><ul class="breadcrumbs" data-v-06970110><li data-v-06970110><a href="/blog/" title="首页" class="iconfont icon-home router-link-active" data-v-06970110></a></li> <li data-v-06970110><a href="/blog/web/#前端" data-v-06970110>前端</a></li><li data-v-06970110><a href="/blog/web/#JavaScript文章" data-v-06970110>JavaScript文章</a></li></ul> <div class="info" data-v-06970110><div title="作者" class="author iconfont icon-touxiang" data-v-06970110><a href="https://github.com/heBody" target="_blank" title="作者" class="beLink" data-v-06970110>heBody</a></div> <div title="创建时间" class="date iconfont icon-riqi" data-v-06970110><a href="javascript:;" data-v-06970110>2020-02-08</a></div> <!----></div></div></div> <!----> <div class="content-wrapper"><!----> <h1><img src="data:image/png;base64,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">JS随机打乱数组<!----></h1> <div class="theme-vdoing-content content__default"><h1 id="js随机打乱数组"><a href="#js随机打乱数组" class="header-anchor">#</a> JS随机打乱数组</h1> <div class="language-js line-numbers-mode"><pre class="language-js"><code><span class="token keyword">function</span> <span class="token function">shuffle</span><span class="token punctuation">(</span><span class="token parameter">arr</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token comment">// 随机打乱数组</span>
- <span class="token keyword">let</span> _arr <span class="token operator">=</span> arr<span class="token punctuation">.</span><span class="token function">slice</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token comment">// 调用数组副本,不改变原数组</span>
- <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">let</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator"><</span> _arr<span class="token punctuation">.</span>length<span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
- <span class="token keyword">let</span> j <span class="token operator">=</span> <span class="token function">getRandomInt</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> i<span class="token punctuation">)</span>
- <span class="token keyword">let</span> t <span class="token operator">=</span> _arr<span class="token punctuation">[</span>i<span class="token punctuation">]</span>
- _arr<span class="token punctuation">[</span>i<span class="token punctuation">]</span> <span class="token operator">=</span> _arr<span class="token punctuation">[</span>j<span class="token punctuation">]</span>
- _arr<span class="token punctuation">[</span>j<span class="token punctuation">]</span> <span class="token operator">=</span> t
- <span class="token punctuation">}</span>
- <span class="token keyword">return</span> _arr
- <span class="token punctuation">}</span>
- <span class="token keyword">function</span> <span class="token function">getRandomInt</span><span class="token punctuation">(</span><span class="token parameter">min<span class="token punctuation">,</span> max</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token comment">// 获取min到max的一个随机数,包含min和max本身</span>
- <span class="token keyword">return</span> Math<span class="token punctuation">.</span><span class="token function">floor</span><span class="token punctuation">(</span>Math<span class="token punctuation">.</span><span class="token function">random</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">*</span> <span class="token punctuation">(</span>max <span class="token operator">-</span> min <span class="token operator">+</span> <span class="token number">1</span><span class="token punctuation">)</span> <span class="token operator">+</span> min<span class="token punctuation">)</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br></div></div> <div data-config="" data-type="vanilla" data-code="%3Chtml%3E%0A%20%20%E5%8E%9F%E6%95%B0%E7%BB%84%EF%BC%9A%3Cspan%20id%3D%22span1%22%3E%3C%2Fspan%3E%0A%20%20%3Cbutton%20id%3D%22btn%22%3Eclick%20me%EF%BC%81%E6%89%93%E4%B9%B1%E6%95%B0%E7%BB%84%3C%2Fbutton%3E%20%3C%2Fbr%3E%3C%2Fbr%3E%0A%20%20%E6%89%93%E4%B9%B1%E7%BB%93%E6%9E%9C%EF%BC%9A%3Cspan%20id%3D%22span2%22%3E%3C%2Fspan%3E%0A%3C%2Fhtml%3E%0A%3Cscript%3E%0A%20%20%20%20function%20getRandomInt(min%2C%20max)%20%7B%20%2F%2F%20%E8%8E%B7%E5%8F%96min%E5%88%B0max%E7%9A%84%E4%B8%80%E4%B8%AA%E9%9A%8F%E6%9C%BA%E6%95%B0%EF%BC%8C%E5%8C%85%E5%90%ABmin%E5%92%8Cmax%E6%9C%AC%E8%BA%AB%0A%20%20%20%20%20%20return%20Math.floor(Math.random()%20*%20(max%20-%20min%20%2B%201)%20%2B%20min)%0A%20%20%20%20%7D%0A%0A%20%20%20%20function%20shuffle(arr)%20%7B%20%2F%2F%20%E9%9A%8F%E6%9C%BA%E6%89%93%E4%B9%B1%E6%95%B0%E7%BB%84%0A%20%20%20%20%20%20let%20_arr%20%3D%20arr.slice()%20%2F%2F%20%E8%B0%83%E7%94%A8%E6%95%B0%E7%BB%84%E5%89%AF%E6%9C%AC%EF%BC%8C%E4%B8%8D%E6%94%B9%E5%8F%98%E5%8E%9F%E6%95%B0%E7%BB%84%0A%20%20%20%20%20%20for%20(let%20i%20%3D%200%3B%20i%20%3C%20_arr.length%3B%20i%2B%2B)%20%7B%0A%20%20%20%20%20%20%20%20let%20j%20%3D%20getRandomInt(0%2C%20i)%0A%20%20%20%20%20%20%20%20let%20t%20%3D%20_arr%5Bi%5D%0A%20%20%20%20%20%20%20%20_arr%5Bi%5D%20%3D%20_arr%5Bj%5D%0A%20%20%20%20%20%20%20%20_arr%5Bj%5D%20%3D%20t%0A%20%20%20%20%20%20%7D%0A%20%20%20%20%20%20return%20_arr%0A%20%20%20%20%7D%0A%0A%20%20%20%20%2F%2F%E4%BD%BF%E7%94%A8%0A%20%20%20%20function%20%24(el)%7B%0A%20%20%20%20%20%20return%20document.querySelector(el)%0A%20%20%20%20%7D%0A%20%20%20%20let%20arr%20%3D%20%5B0%2C%201%2C%202%2C%203%2C%204%2C%205%2C%206%2C%207%2C%208%2C%209%5D%3B%0A%20%20%20%20const%20%24span2%20%3D%20%24('%23span2')%3B%0A%0A%20%20%20%20%24('%23span1').textContent%20%3D%20arr%3B%0A%20%20%20%20%24('%23btn').onclick%20%3D%20function%20()%20%7B%0A%20%20%20%20%20%20%24span2.textContent%20%3D%20shuffle(arr)%3B%0A%20%20%20%20%7D%0A%20%20%3C%2Fscript%3E%0A" class="vuepress-plugin-demo-block__wrapper" style="display:none;"><div class="vuepress-plugin-demo-block__display"><div class="vuepress-plugin-demo-block__app"></div></div> <div class="vuepress-plugin-demo-block__code"><div class="language-html line-numbers-mode"><pre class="language-html"><code><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>html</span><span class="token punctuation">></span></span>
- 原数组:<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>span</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>span1<span class="token punctuation">"</span></span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"></</span>span</span><span class="token punctuation">></span></span>
- <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>button</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>btn<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>click me!打乱数组<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>button</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>br</span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"></</span>br</span><span class="token punctuation">></span></span>
- 打乱结果:<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>span</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>span2<span class="token punctuation">"</span></span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"></</span>span</span><span class="token punctuation">></span></span>
- <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>html</span><span class="token punctuation">></span></span>
- <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>script</span><span class="token punctuation">></span></span><span class="token script"><span class="token language-javascript">
- <span class="token keyword">function</span> <span class="token function">getRandomInt</span><span class="token punctuation">(</span><span class="token parameter">min<span class="token punctuation">,</span> max</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token comment">// 获取min到max的一个随机数,包含min和max本身</span>
- <span class="token keyword">return</span> Math<span class="token punctuation">.</span><span class="token function">floor</span><span class="token punctuation">(</span>Math<span class="token punctuation">.</span><span class="token function">random</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">*</span> <span class="token punctuation">(</span>max <span class="token operator">-</span> min <span class="token operator">+</span> <span class="token number">1</span><span class="token punctuation">)</span> <span class="token operator">+</span> min<span class="token punctuation">)</span>
- <span class="token punctuation">}</span>
- <span class="token keyword">function</span> <span class="token function">shuffle</span><span class="token punctuation">(</span><span class="token parameter">arr</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token comment">// 随机打乱数组</span>
- <span class="token keyword">let</span> _arr <span class="token operator">=</span> arr<span class="token punctuation">.</span><span class="token function">slice</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token comment">// 调用数组副本,不改变原数组</span>
- <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">let</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator"><</span> _arr<span class="token punctuation">.</span>length<span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
- <span class="token keyword">let</span> j <span class="token operator">=</span> <span class="token function">getRandomInt</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> i<span class="token punctuation">)</span>
- <span class="token keyword">let</span> t <span class="token operator">=</span> _arr<span class="token punctuation">[</span>i<span class="token punctuation">]</span>
- _arr<span class="token punctuation">[</span>i<span class="token punctuation">]</span> <span class="token operator">=</span> _arr<span class="token punctuation">[</span>j<span class="token punctuation">]</span>
- _arr<span class="token punctuation">[</span>j<span class="token punctuation">]</span> <span class="token operator">=</span> t
- <span class="token punctuation">}</span>
- <span class="token keyword">return</span> _arr
- <span class="token punctuation">}</span>
- <span class="token comment">//使用</span>
- <span class="token keyword">function</span> <span class="token function">$</span><span class="token punctuation">(</span><span class="token parameter">el</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
- <span class="token keyword">return</span> document<span class="token punctuation">.</span><span class="token function">querySelector</span><span class="token punctuation">(</span>el<span class="token punctuation">)</span>
- <span class="token punctuation">}</span>
- <span class="token keyword">let</span> arr <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">6</span><span class="token punctuation">,</span> <span class="token number">7</span><span class="token punctuation">,</span> <span class="token number">8</span><span class="token punctuation">,</span> <span class="token number">9</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
- <span class="token keyword">const</span> $span2 <span class="token operator">=</span> <span class="token function">$</span><span class="token punctuation">(</span><span class="token string">'#span2'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
- <span class="token function">$</span><span class="token punctuation">(</span><span class="token string">'#span1'</span><span class="token punctuation">)</span><span class="token punctuation">.</span>textContent <span class="token operator">=</span> arr<span class="token punctuation">;</span>
- <span class="token function">$</span><span class="token punctuation">(</span><span class="token string">'#btn'</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function-variable function">onclick</span> <span class="token operator">=</span> <span class="token keyword">function</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
- $span2<span class="token punctuation">.</span>textContent <span class="token operator">=</span> <span class="token function">shuffle</span><span class="token punctuation">(</span>arr<span class="token punctuation">)</span><span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </span></span><span class="token tag"><span class="token tag"><span class="token punctuation"></</span>script</span><span class="token punctuation">></span></span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br><span class="line-number">29</span><br><span class="line-number">30</span><br><span class="line-number">31</span><br><span class="line-number">32</span><br><span class="line-number">33</span><br></div></div></div> <div class="vuepress-plugin-demo-block__footer"></div></div></div></div> <div class="page-edit"><div class="edit-link"><a href="https://github.com/heBody/blog/edit/master/docs/01.前端/25.JavaScript文章/50.js随机打乱数组.md" target="_blank" rel="noopener noreferrer">编辑</a> <span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></div> <!----> <div class="last-updated"><span class="prefix">上次更新:</span> <span class="time">2022/12/14, 19:36:42</span></div></div> <div class="page-nav-wapper"><div class="page-nav-centre-wrap"><a href="/blog/pages/e808fba1fa8fbab2/" class="page-nav-centre page-nav-centre-prev"><div class="tooltip">多种数组去重性能对比</div></a> <a href="/blog/pages/40f623be692cf8bc/" class="page-nav-centre page-nav-centre-next"><div class="tooltip">判断是否为移动端浏览器</div></a></div> <div class="page-nav"><p class="inner"><span class="prev">
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