title: AngularJS custom model objects with methods?
body: <p>When you have a JSON $resource how can you cast the resulting objects into more specific objects once obtained?</p>
  
  <p>For example, right now they come back as an Array of Objects, but I want them to come back as an Array of "Appointment" objects, so that I can have some methods on that Appointment object which would answer questions about that Appointment object. Ex: Does This Appointment have any services associated with it? Is This appointment in the morning or afternoon?</p>
  
  <p>At first I thought transformResponse hook would work from ngResource, but that doesn't appear to work. The return from that is not the actual objects. Seems that with that function you can only modify the actual data prior to the JSON parsing.</p>
  
  <p>Finally, I question if this is even a proper angularJS technique? Or should these helper methods just show up in a controller or some other module and accept the object to work upon? I just think its cleaner to have them wrapped up in the object, but I admit that I'm not very experienced in angularJS.</p>