Find and update a hash by HashKey to add record for saving
<p>Lets say I have an array of hashes:</p>

<pre><code>hash = [{"one": 1}, {"two": 2}]
</code></pre>

<p>And I want to find a hash and add to it. For example find "one" and add:</p>

<pre><code>hash =  [{"one": 1, "new": new}, {"two": 2}]
</code></pre>

<p>I could do this by hash key? If so how would I do it? Or is there a much better way to do this thing in Javascript? I dont want to copy the hash, make a new one and delete the old one. Just update what is already there.</p>
