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<h2><a href="./">Go by Example 中文版</a>: 排序</h2>

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<p>Go 的 <code>sort</code> 包实现了内建及用户自定义数据类型的排序功能。

我们先来看看内建数据类型的排序。</p>

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<a href="https://play.studygolang.com/p/_WIuUiKBgd-"><img title="Run code" src="play.png" class="run" /></a><img title="Copy code" src="clipboard.png" class="copy" />

<pre class="chroma"><span class="kn">package</span> <span class="nx">main</span>

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<pre class="chroma"><span class="kn">import</span> <span class="p">(</span>

<span class="s">&#34;fmt&#34;</span>

<span class="s">&#34;sort&#34;</span>

<span class="p">)</span>

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<pre class="chroma"><span class="kd">func</span> <span class="nf">main</span><span class="p">()</span> <span class="p">{</span>

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<p>排序方法是针对内置数据类型的；

这是一个字符串排序的例子。

注意，它是原地排序的，所以他会直接改变给定的切片，而不是返回一个新切片。</p>

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<span class="nx">strs</span> <span class="o">:=</span> <span class="p">[]</span><span class="kt">string</span><span class="p">{</span><span class="s">&#34;c&#34;</span><span class="p">,</span> <span class="s">&#34;a&#34;</span><span class="p">,</span> <span class="s">&#34;b&#34;</span><span class="p">}</span>

<span class="nx">sort</span><span class="p">.</span><span class="nf">Strings</span><span class="p">(</span><span class="nx">strs</span><span class="p">)</span>

<span class="nx">fmt</span><span class="p">.</span><span class="nf">Println</span><span class="p">(</span><span class="s">&#34;Strings:&#34;</span><span class="p">,</span> <span class="nx">strs</span><span class="p">)</span>

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<p>一个 <code>int</code> 排序的例子。</p>

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<span class="nx">ints</span> <span class="o">:=</span> <span class="p">[]</span><span class="kt">int</span><span class="p">{</span><span class="mi">7</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="mi">4</span><span class="p">}</span>

<span class="nx">sort</span><span class="p">.</span><span class="nf">Ints</span><span class="p">(</span><span class="nx">ints</span><span class="p">)</span>

<span class="nx">fmt</span><span class="p">.</span><span class="nf">Println</span><span class="p">(</span><span class="s">&#34;Ints: &#34;</span><span class="p">,</span> <span class="nx">ints</span><span class="p">)</span>

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<p>我们也可以使用 <code>sort</code> 来检查一个切片是否为有序的。</p>

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<span class="nx">s</span> <span class="o">:=</span> <span class="nx">sort</span><span class="p">.</span><span class="nf">IntsAreSorted</span><span class="p">(</span><span class="nx">ints</span><span class="p">)</span>

<span class="nx">fmt</span><span class="p">.</span><span class="nf">Println</span><span class="p">(</span><span class="s">&#34;Sorted: &#34;</span><span class="p">,</span> <span class="nx">s</span><span class="p">)</span>

<span class="p">}</span>

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<p>运行程序，打印排序好的字符串和整型切片，

以及数组是否有序的检查结果：<code>true</code>。</p>

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<span class="gp">$</span> go run sorting.go

<span class="go">Strings: [a b c]

</span><span class="go">Ints: [2 4 7]

</span><span class="go">Sorted: true</span></pre>

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<p class="next">

下一个例子: <a href="sorting-by-functions">使用函数自定义排序</a>

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<a href="https://twitter.com/mmcgrana">@mmcgrana</a> 和<a href="https://eli.thegreenplace.net">Eli Bendersky</a>编写 | <a href="https://github.com/gobyexample-cn">gobyexample-cn</a> 翻译 | <a href="https://github.com/gobyexample-cn/gobyexample/issues">反馈</a> | <a href="https://github.com/gobyexample-cn/gobyexample">源码</a> | <a href="https://github.com/mmcgrana/gobyexample#license">license</a> </p>

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