Limit the number of requests with batch requests in AngularJS

gistfile1.js

// Going mobile with Angular by Ari
// Limit & batch number of network requests
// Source: https://speakerdeck.com/auser/going-mobile-with-angular?utm_source=ng-newsletter&utm_campaign=b5794c7e19-AngularJS_Newsletter_2_4_142_3_2014&utm_medium=email&utm_term=0_fa61364f13-b5794c7e19-96511737
angular.module('myApp.services')
  .factory('NetworkBatcher', function($http){
    var service = {
      promises: [],
      addCall: function(obj){
        var promise = $http(obj); 
        service.promises.push(promise);
        return promise;
      },
      runAll: function(){
        return $q.all(service.promises);
      }
    };
    return service;
});

// Usage
angular.module('myApp.services')
  .factory('Account', function(NetworkBatcher){
    return {
      getAccounts: function(){
        return NetworkBatcher.addCall({method: 'GET', url: '/v1/accounts.json')});
      }
    };
});