Combine two arrays into one array javascript
<p>I have two arrays currently</p>

<pre><code>array1 = [5, 10, 20]
array2 = [10, 20, 30]
</code></pre>

<p>Either array3 or something like this:</p>

<pre><code>array4 = [{"a":5, "b":10}, {"a":10, "b":20}, {"a":20, "b":30}]
</code></pre>

<p>I know this is probably an easy question but I'm not even sure what array3 would be called so its kind of hard to google this.</p>
