Angularjs实现数组随机排序

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<!DOCTYPE html>
<html>

   <head>
       <meta charset="UTF-8">
       <title>实现数组随机排序</title>
     //需要导入angular.js库文件
       <script type="text/javascript" src="../angular-1.5.5/angular-1.5.5/angular.js"></script>
       <script type="text/javascript">
           var app = angular.module("myApp", []);
           var arr1 = [1, 2, 3, 7, 4, 9, 5, 6];
           app.service("sortService", function() {
               this.arr = [1, 2, 3, 7, 4, 9, 5, 6];
               this.t;
               this.mySort = function() {
                   //alert("haha");
                   for(var i = 0; i < this.arr.length; i++) {
                       var rand = parseInt(Math.random() * this.arr.length);
                       this.t = this.arr[rand];
                       this.arr[rand] = this.arr[i];
                       this.arr[i] = this.t;
                   }
               }
           })
           app.controller("myCtrl", function($scope, sortService) {
               $scope.arr = arr1;
               $scope.newArr = sortService.arr;
               $scope.mySort2 = sortService.mySort;

               /*$scope.mySort2 = function(){
                   sortService.mySort();
               }*/
           })
       </script>
   </head>

   <body ng-app="myApp" ng-controller="myCtrl">
       {{newArr}}<br><button ng-click="mySort2()">点击随机排序</button> <br>{{arr}}
       
   </body>

</html>

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