$scope.data = [
    {
    "name": "Jim","id" : 25
    },{
    "name": "Jerry","id": 27
    },{
    "name": "Rithika","id": 20
    }
    ];

    <div ng-repeat="person in data | filter: {id:20}">
        {{parent_index}}
    </div>

parent_index – 实际数组中过滤的元素的索引。

在这个例子中，parent_index应该返回2.怎么找到呢？