<p>I have been playing with Golang for a few weeks now and I love it. But I recently discovered for myself something really cool!</p>
<p>I look at a lot of code and see things like this..</p>
<p><code>
tmp := a[j]
a[j] = a[i]
a[i] = tmp
</code>
And I have even done it a few times myself but I recently learned that you can do this</p>
<p><code>
a[i], a[j] = a[j], a[i]
</code></p>
<p>I just wanted to put that trick out there and to me it made all of the difference.</p>
<p>Here was a quick bubble sort I wrote implementing this swap.
<a href="http://pastebin.com/pcaWFna1" rel="nofollow">http://pastebin.com/pcaWFna1</a></p>
<p>My question is, is this a stable and safe thing to do. To the Go masters are there any issues with this?</p>
<hr/>**评论：**<br/><br/>adonovan76: <pre><p>No, you should never implement bubble sort. ;-)</p></pre>tehbmar: <pre><p>I was on HackerRank and they wanted me to write one D:</p></pre>DeedleFake: <pre><p>Yes, it's totally fine. In fact, this is pretty much the recommended way to swap two variables. The spec states that the right-hand side of an assignment is fully evaluated before the left-hand side, so this works just fine.</p>
<p>Also, to insert code into text on Reddit, or any Markdown, for that matter, either prefix each line of the code with four spaces, or surround it with backticks.</p></pre>tehbmar: <pre><p>Ah thank you I didn't know Reddit had markdown, thanks for the heads up!</p></pre>bradfitz: <pre><p>Only tangentially related, but I just recently wrote this: <a href="https://godoc.org/go4.org/reflectutil#Swapper" rel="nofollow">https://godoc.org/go4.org/reflectutil#Swapper</a></p></pre>tehbmar: <pre><p>New lines were remove so the formatting looks a little bad, sorry D:</p></pre>RalphCorderoy: <pre><p>You can also do <code>x, y = f()</code>. Study <a href="https://golang.org/ref/spec#Assignments" rel="nofollow">https://golang.org/ref/spec#Assignments</a> for enlightenment. And prefer <a href="https://en.wikipedia.org/wiki/Insertion_sort" rel="nofollow">https://en.wikipedia.org/wiki/Insertion_sort</a> over Bubble Sort for a simple method to implement. ;-)</p></pre>
