What's the meaning of $ in front of a variable
<p>The $ dollar sign in front of (this) serves to select the current element. I'm a little confused about the $ in front of option and thisSelect. Do they have a special meaning?</p>

<pre><code>var $options = $(this).children('option');
var $thisSelect = $(this);
</code></pre>

<p>Thanks for helping</p>
