function PhoneListCtrl($scope){
$scope.phones=[
{"name":"Nexus S","snippet":"Fast just got faster with Nexus S.","age":0}, {"name":"Motorola XOOM™ with Wi-Fi","snippet":"The Next, Next Generation tablet.","age":1},
{"name":"MOTOROLA XOOM™","snippet":"The Next, Next Generation tablet.","age":2}
];
$scope.orderProp='age';
}
参数后面增加了一个参数：“age”
紧接着在controller中增加了一个：$scope.orderProp='age';
意思是根据age参数进行排序
