front__codeschool-angular-2/app/js/controllers/users-index-controller.js

angular.module('NoteWrangler').controller('UsersIndexController', function($scope, User, $gravatar) {
  
  // Without NgResource
  // User.all().success(function(data) {
  //   $scope.users = data;
  // });
  
  // With NgResource
  $scope.users = User.query();
  
  $scope.gravatarUrl = function(user) {
    return $gravatar.generate(user.email);
  }
});