title: Or operator on angularjs filter
body: <p>i'm trying to get 2 object of a table.</p>
  
  <pre><code>var tab=[
  {t:"t1",selected:true},
  {t:"t2"},
  {t:"t3",selected:false}];
  </code></pre>
  
  <p>Where selected is false or undefined.</p>
  
  <p>With <code>$filter('filter')(tab,{selected:"!"}||{selected:false});</code> </p>
  
  <p>I only get the object <code>[{"t":"t2"}]</code></p>
  
  <p>Is it possible to filter with an or operator with this filter?</p>