sorting

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      <h2><a href="./">Go by Example</a>: Sorting</h2>

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            <p>Go&rsquo;s <code>sort</code> package implements sorting for builtins
and user-defined types. We&rsquo;ll look at sorting for
builtins first.</p>

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	        <a href="http://play.golang.org/p/roQOJXtqAb"><img title="Run code" src="play.png" class="run" /></a>
            <div class="highlight"><pre><span class="kn">package</span> <span class="nx">main</span>
</pre></div>

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            <div class="highlight"><pre><span class="kn">import</span> <span class="s">&quot;fmt&quot;</span>
<span class="kn">import</span> <span class="s">&quot;sort&quot;</span>
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            <div class="highlight"><pre><span class="kd">func</span> <span class="nx">main</span><span class="p">()</span> <span class="p">{</span>
</pre></div>

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            <p>Sort methods are specific to the builtin type;
here&rsquo;s an example for strings. Note that sorting is
in-place, so it changes the given slice and doesn&rsquo;t
return a new one.</p>

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            <div class="highlight"><pre>    <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">&quot;c&quot;</span><span class="p">,</span> <span class="s">&quot;a&quot;</span><span class="p">,</span> <span class="s">&quot;b&quot;</span><span class="p">}</span>
    <span class="nx">sort</span><span class="p">.</span><span class="nx">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="nx">Println</span><span class="p">(</span><span class="s">&quot;Strings:&quot;</span><span class="p">,</span> <span class="nx">strs</span><span class="p">)</span>
</pre></div>

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            <p>An example of sorting <code>int</code>s.</p>

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            <div class="highlight"><pre>    <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="nx">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="nx">Println</span><span class="p">(</span><span class="s">&quot;Ints:   &quot;</span><span class="p">,</span> <span class="nx">ints</span><span class="p">)</span>
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            <p>We can also use <code>sort</code> to check if a slice is
already in sorted order.</p>

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            <div class="highlight"><pre>    <span class="nx">s</span> <span class="o">:=</span> <span class="nx">sort</span><span class="p">.</span><span class="nx">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="nx">Println</span><span class="p">(</span><span class="s">&quot;Sorted: &quot;</span><span class="p">,</span> <span class="nx">s</span><span class="p">)</span>
<span class="p">}</span>
</pre></div>

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            <p>Running our program prints the sorted string and int
slices and <code>true</code> as the result of our <code>AreSorted</code> test.</p>

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            <div class="highlight"><pre><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></div>

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      <p class="next">
        Next example: <a href="sorting-by-functions">Sorting by Functions</a>.
      </p>

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        by <a href="https://twitter.com/mmcgrana">@mmcgrana</a> | <a href="mailto:mmcgrana@gmail.com">feedback</a> | <a href="https://github.com/mmcgrana/gobyexample/blob/master/examples/sorting">source</a> | <a href="https://github.com/mmcgrana/gobyexample#license">license</a>
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