AngularJs ng-repeat限制循环次数

重复数组：
<ul ng-init='name=[1,2,3,3]'>
    <li ng-repeat="name in name track by $index">
    {{name}}
    </li>
</ul>
对象：
<ul ng-init='obj={ a:"aaa", b:"bbb", c:"ccc" }'>
    <li ng-repeat='(key, value) in obj'>{{key}},{{value}}</li>
</ul>
限制次数  | limitTo：num   
<ul ng-init='obj2=[{ a:"1aaa", b:"bbb"},{a:"2eee",b:"fff"},{a:"3i", b:"jjj"}]'>
    <li ng-repeat='obj2 in obj2 | limitTo:2'>{{obj2.a}}+{{obj2.b}}</li>
</ul>

 限制次数 | limitTo：num