title: How to use (find)where in backbone to get a specific field of an array
body: <p>I use to use the <code>where</code> method from the <code>Collections</code> in backbone. But I don't see how to fetch this result:</p>
  
  <pre><code>MyCollection.Group[x].id
  </code></pre>
  
  <p>As you can guess, <code>MyCollection</code> is the collection, <code>Group</code> is an array, and <code>id</code> is the field I would like to match for a specific value, something like:</p>
  
  <pre><code>MyCollection.findWhere(Group[x].id: 34);
  </code></pre>
  
  <p>I have seen the "contains" function of <code>underscore</code> but it doesn't seems to work with associative arrays</p>
  
  <p>Is there a way to do it or should we parse the collection manually using Javascript ?</p>