promise.js

/*** inside Angular **/
var someService = function($q, $http) {
  
  var service = this;
  
  service.findSomething = function(query) {
    var somePromise = $q.defer()
    
    $http.get(/*something well done here */).then(function(data){
      somePromise.resolve(data);
    })
    
    return somePromise.promise
    
  }
  
}