树结构递归生成嵌套json

var getJsonTree = function(data, parentId) {

    var itemArr = [];

    for (var i = 0; i < data.length; i++) {

        var node = data[i];

        if (node.parentId == parentId) {

            var newNode = {};

            newNode.id = node.id;

            newNode.name = node.name;

            newNode.url = node.url;

            newNode.icon = node.icon;

            newNode.nodes = getJsonTree(data, node.id);

            itemArr.push(newNode);

        }

    }

    return itemArr;

};

$scope.data = getJsonTree($scope.menus, "");