我试图给这个循环。

  VAR arrObj = {    ID：7，    activityName：钻孔，    parentActivityId：1，    项目：[]};功能populateObj（arrObj）{   对于（VAR I = 0; I＆LT; $ scope.data.length;我++）{        如果（$ scope.data [I] .ID == arrObj.parentActivityId）{            $ scope.data.push（arrObj）;        }    }};populateObj（arrObj）; 

这将推动仅对parent.I通过识别THR parentActivityId.Any的帮助将是非常美联社preciated以确定孩子以及在for循环，并推动特定数组对象。

通过递归的建议，的 Array.prototype.reduce（） ：

\r\r

\r\r\r

I'm having a JSON array with properties as id and parentActivityId.

$scope.data = [
    {
        id: 1,
        activityName: "Drilling",
        parentActivityId: 0,
        items: [
            {
                id: 2,
                activityName: "Blasting",
                parentActivityId: 1,
                items: [
                    {
                        id: 3,
                        activityName: "Ann",
                        parentActivityId: 2,
                        items: [],

                    },
                    {
                        id: 4,
                        activityName: "Ann",
                        parentActivityId: 2,
                        items: [],

                    }
                ]
            },
            {
                id: 5,
                activityName: "Transport",
                parentActivityId: 1,
                items: [
                    {
                        id: 6,
                        activityName: "Daniel",
                        parentActivityId: 5,
                        items: [],
                    }
                ]
            }
        ]
    }
];

I would like to push a new item based on the parentActiityId.The new item will be having a new id. Example:If my object is like this:

{
    id: 7,
    activityName: "Drilling",
    parentActivityId: 1,
    items: []
}

then my object will look like this..

 $scope.data = [
        {
            id: 1,
            activityName: "Drilling",
            parentActivityId: 0,
            items: [
                {
                    id: 2,
                    activityName: "Blasting",
                    parentActivityId: 1,
                    items: [
                        {
                            id: 3,
                            activityName: "Ann",
                            parentActivityId: 2,
                            items: [],

                        },
                        {
                            id: 4,
                            activityName: "Ann",
                            parentActivityId: 2,
                            items: [],

                        },
                    {
                         id: 7,
                         activityName: "Drilling",
                         parentActivityId: 2,
                         items: [],
                     }
                    ]
                },
                {
                    id: 5,
                    activityName: "Transport",
                    parentActivityId: 1,
                    items: [
                        {
                            id: 6,
                            activityName: "Daniel",
                            parentActivityId: 5,
                            items: [],
                        }
                    ]
                }
            ]
        }
    ];

I tried by giving this for loop..

var arrObj = {
    id: 7,
    activityName: "Drilling",
    parentActivityId: 1,
    items: []
};

function populateObj(arrObj) {
   for (var i = 0; i < $scope.data.length; i++) {
        if ($scope.data[i].id == arrObj.parentActivityId) {
            $scope.data.push(arrObj);
        }
    }
};

populateObj(arrObj);

which will push only to the parent.I want to identify the child as well in the for loop and the push to the specific array object by identifying thr parentActivityId.Any help will be really appreciated.

With a recursive proposal and Array.prototype.reduce():

var data=[{id:1,activityName:"Drilling",parentActivityId:0,items:[{id:2,activityName:"Blasting",parentActivityId:1,items:[{id:3,activityName:"Ann",parentActivityId:2,items:[]},{id:4,activityName:"Ann",parentActivityId:2,items:[]}]},{id:5,activityName:"Transport",parentActivityId:1,items:[{id:6,activityName:"Daniel",parentActivityId:5,items:[]}]}]}],
    child = { id: 7, activityName: "Drilling", parentActivityId: 1, items: [] };

function getParent(r, a) {
    return a.id === child.parentActivityId ? a : a.items.reduce(getParent, r);
}

var node = data.reduce(getParent, {});
'items' in node && node.items.push(child);

document.write('<pre>' + JSON.stringify(data, 0, 4) + '</pre>');