title: How do you filter based on css class in Angular.js?
body: <p>I'm trying to filter my results based on a css class and can't seem to think of the easiest/best way to do that.</p>
  
  <p>Here's my <a href="http://plnkr.co/edit/kkjoVs?p=preview" rel="nofollow">plunker example</a></p>
  
  <p>Essentially by clicking on a link, I would like my filtered results to only show items where the "in_red" class is used.</p>