sort a dictionary (or whatever key-value data structure in js) on word_number keys efficiently
<p>how do I sort a dictionary by key like</p>

<pre><code>dict["word_21"] = "Hello Java";
dict["word_22"] = "Hello World";
dict["word_11"] = "Hello Javascript";
</code></pre>

<p>so that I get </p>

<pre><code>dict["word_22"] = "Hello World";
dict["word_21"] = "Hello Java";
dict["word_11"] = "Hello Javascript";
</code></pre>

<p>There are word_number combinations on indices only and the values are strings. The indices are distinct (no equal values) but could be "undefined" in an error case</p>

<p>Edit: Actually I need the descending and ascending order of it. But the descending order is what I need at the moment.</p>
