Angular: Promise

ng-promise.js

angular.module('app', [])
  .service('UserService', function($http, $q) {
    this.users = []
    this.user = {}

    function getData(obj, prop, id) {
      var q = $q.defer()
      var url = '/users/'
      $http.get(url + id).success(function(response) {
        obj[prop] = response
        q.resolve()
      })
      return q.promise
    }

    this.all = function() {
      getData(this, 'users')
    }
    this.get = function(id) {
      getData(this, 'user', id)
    }
  })