title: angularjs ng-repeat ordering string arrays in numerical order
body: <p>I have a list of post with ids like
  <code>1,2,3,4,5,6,7,8,9,10,11,12</code>
  (json format)
  The ids are of type String. But I would like to order it according to its numerical order
  Normal orderBy:'fiche.id' the list is displayed as below.
  <code>1,10,11,12,2,3,4,5,6,7,8,9</code></p>
  
  <p>I would like the output to be of order - 1,2,3,4,5,6,7,8,9,10,11,12</p>