Angularjs

Fins Missing Value in Array

HTML

<script src="https://code.angularjs.org/1.5.5/angular.js"></script>
<div ng-controller="MyCtrl">
  Hello, {{name}}!
  <div ng-class="init()"></div>
</div>

JavaScript

var myApp = angular.module('myApp',[]);
myApp.controller('MyCtrl', function($scope){
	$scope.name = 'Superhero';
  var this_ = $scope;
  this_.madterList = [
         {
          id: "templates/957583552238221550/attributes/45949626884836407",
          displayLabel: "Headline Text",
          altText: "Headline Text",
          type: "FORMAT",
          visibility: "INTERNAL",
          ariaLabel: "Headline Text",
          version: "1",
         	optionType: "SINGLE_OPTION"
        },
        {
          id: "templates/957583552238221550/attributes/221516195381496105",
          displayLabel: "Frame Rate Range",
          altText: "Frame Rate Range",
          type: "FORMAT",
          visibility: "INTERNAL",
          ariaLabel: "Frame Rate Range",
          version: "1",
          optionType: "SINGLE_OPTION"
        },
        {
          id: "templates/957583552238221550/attributes/277637680834937851",
          displayLabel: "Close Button Requirements",
          altText: "Close Button Requirements",
          possibleOptions: [
            "Close button is required.",
            "No close button requirement.",
            "This ad unit will have a close option on it so that users may close the unit.",
            "X Close Expanded button must have pixel padding from sides of expanded masthead unit and function immediately after expansion",
            "Panels must contain a prominent Close X, in %s point font or larger, on the corner of the unit."
          ],
          type: "FORMAT",
          visibility: "INTERNAL",
          ariaLabel: "Close Button Requirements",
          version: "1",
          optionType: "MULTIPLE_MULTIPLE_OPTION"
        }
  ];
  this_.desktop = {
  	selectedList: [],
    viewOnlyList: []
  };
  this_.mobileWeb = {
  	selectedList: [],
    viewOnlyList: []
  };

  $scope.init = function () {
    angular.copy (this_.madterList, this_.desktop.viewOnlyList);
    angular.copy (this_.madterList, this_.mobileWeb.viewOnlyList);
   ...