title: Setter and getter using angular service/factory
body: <p>I want to pass big chunk of data from controller A to controller B.</p>
  
  <p>so I made this factory</p>
  
  <pre><code>angular.module('MyApp')
    .factory('holdCustomCover', function($scope, img_data) {
          return {
              save: $scope.img_data = img_data;
  
              get: $scope.img_data;
          }
    })
  </code></pre>
  
  <p>am I doing it right? so later in controller A what should I do? like
  <code>holdCustomCover.save(myImgDataHere)</code>?</p>
  
  <p>Then in controller B I do <code>holdCustomCover.get()</code> I can get the img value?</p>