Sum javascript arrays repeated value
<p>I am trying to sum repeated javascript arrays value and I want to every key has one value after this sum.</p>

<p>Here is javascript array example:</p>

<pre><code>var myArray = [ {'TR-01':1}, {'TR-02':3}, {'TR-01':3}, {'TR-02':5}];
</code></pre>

<p>Desired Formatted Array Should Like This:</p>

<pre><code>var newArray = [ {'TR-01':4}, {'TR-02':8}];
</code></pre>

<p>How can we do this in javascript?</p>