orderBy 是一个排序用的过滤器标签。它可以像 sort 函数那样支持一个排序函数，也可以简单地指定一个属性名进行操作：
<div ng-controller="TestCtrl">{{ data | orderBy: 'age' }} <br />{{ data | orderBy: '-age' }} <br />{{ data | orderBy: '-age' | limitTo: 2 }} <br />{{ data | orderBy: ['-age', 'name'] }} <br /></div><script type="text/javascript">var TestCtrl = function($scope){$scope.data = [{name: 'B', age: 4}, {name: 'A', age: 1}, {name: 'D', age: 3}, {name: 'C', age: 3}, ];}angular.bootstrap(document.documentElement);</script>