Concat in an empty array in Javascript
<p>I was browsing through some code and I was wondering how this could be useful</p>

<pre><code>grid.push([].concat(row));
</code></pre>

<p>In my understanding it is the same as</p>

<pre><code>grid.push([row]);
</code></pre>

<p>Why the 'concat' fuss?</p>