title: Is setting var _ = this bad practice in javascript
body: <p>I was looking through some open source code the other day and noticed they used <code>var _ = this;</code> to maintain a reference to the original this. Now as a novice in Javascript I was wondering if this is bad practice?</p>
  
  <p>I have seen and used <code>self = this</code>, <code>that = this</code>, <code>me = this</code>, however the use of the underscore makes the code easier to read in my eyes. Especially since in the plugin I'm writing requires it's use often. My eyes can focus on the actually variable/function more easily. </p>
  
  <p>Now my question to you all is how do you feel about using <code>_ = this;</code></p>
  
  <p>Here is the code I was referring to.</p>
  
  <p><a href="https://github.com/kenwheeler/slick/blob/master/slick/slick.js" rel="nofollow">https://github.com/kenwheeler/slick/blob/master/slick/slick.js</a></p>