angular_factory.js

angular.module('twitter')
  .factory('theirTwitterFactory', function($http){
    var factory = {};
    $http.get('/data/theirs.json')
      .success(function(data, status, headers, config) {
        factory.tweets = data;
      });

    return {
        tweets: function(){
          return factory.tweets;
        }
    };
  });