title: Why does not work pipe orderby?
body: <p>Call like this:</p>
  
  <pre><code>&lt;span *ngFor="let lang of languages | orderBy:def"&gt;{{lang.code}}&lt;/span&gt;
  </code></pre>
  
  <p>Where <code>def</code> from <code>lang.def</code> and can be <code>true/false</code></p>
  
  <p>Pipe code is availabel by <a href="http://www.allenhashkey.com/web-development/angular2/angular-2-order-by-pipe/" rel="nofollow noreferrer">link</a>:
  When I use this pipe it does not filter by <code>def</code> value(boolean)</p>