title: Angular : ng-if with dictionaries
body: <p>Kind new to AngularJS I'm encountering the following problem : </p>
  
  <p>How could eval with <code>ng-if</code> if a dictionary is empty or not ? </p>
  
  <p>With arrays <code>ng-if="myArray.length"</code> works great but doesn't with dictionaries. </p>
  
  <p>Edit : Also already tried <code>Object.keys(myDict).length</code> which doesn't work. </p>