AngularJS使用orderBy报错

1、错误描述

2、错误原因

<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<script src="http://apps.bdimg.com/libs/angular.js/1.4.6/angular.min.js"></script>
		<script>
			var app = angular.module("myApp",[]);
			app.controller("ctrl",function($scope,$location){
				$scope.firstname = "张";
				$scope.lastname = "三丰";
				$scope.upper = "Hello，World!";
				$scope.fullName = function(){
					return $scope.firstname + $scope.lastname;
				}
				$scope.names = [
					{name:"zhangsan",age:12,sex:"男"},
					{name:"lsi",age:27,sex:"女"},
					{name:"wangwu",age:22,sex:"男"}
				];
				$scope.myUrl = $location.absUrl();
			});
		</script>
	</head>
	<body>
		<div ng-app="myApp" ng-controller="ctrl">
			姓：<input type="text" ng-model="lastname" /><br>
			名：<input type="text" ng-model="firstname" /><br>
			姓名：{{firstname+lastname}}<br>
			全名：{{fullName()}}<br>
			大写：{{upper | uppercase}}<br>
			小写：{{upper | lowercase}}<br>
			<ul>
				<li ng-repeat="x in names | orderBy：'age'">
					{{x.name+","+x.age+","+x.sex}}
				</li>
			</ul><br>
			{{myUrl}}
		</div>
	</body>
</html>

在实现对无序列表按照“age”字段排序，出现错误；由于“orderBy：”后面用了中文字符导致出错

3、解决办法

<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<script src="http://apps.bdimg.com/libs/angular.js/1.4.6/angular.min.js"></script>
		<script>
			var app = angular.module("myApp",[]);
			app.controller("ctrl",function($scope,$location){
				$scope.firstname = "张";
				$scope.lastname = "三丰";
				$scope.upper = "Hello，World!";
				$scope.fullName = function(){
					return $scope.firstname + $scope.lastname;
				}
				$scope.names = [
					{name:"zhangsan",age:12,sex:"男"},
					{name:"lsi",age:27,sex:"女"},
					{name:"wangwu",age:22,sex:"男"}
				];
				$scope.myUrl = $location.absUrl();
			});
		</script>
	</head>
	<body>
		<div ng-app="myApp" ng-controller="ctrl">
			姓：<input type="text" ng-model="lastname" /><br>
			名：<input type="text" ng-model="firstname" /><br>
			姓名：{{firstname+lastname}}<br>
			全名：{{fullName()}}<br>
			大写：{{upper | uppercase}}<br>
			小写：{{upper | lowercase}}<br>
			<ul>
				<li ng-repeat="x in names | orderBy:'age'">
					{{x.name+","+x.age+","+x.sex}}
				</li>
			</ul><br>
			{{myUrl}}
		</div>
	</body>
</html>