js List<Map> 将偏平化的数组转为树状结构并排序

数据格式：

[
{
"id":"d3e8a9d6-e4c6-4dd8-a94f-07733d3c1b59",
"parentId":"6d460008-38f7-479d-b6d1-058ebc17dae3",
"myorder":1,
"name":"任务一"
},
{
"id":"6d460008-38f7-479d-b6d1-058ebc17dae3",
"parentId":"33978737-c722-4339-88a1-a9829dd4bca2",
"myorder":1,
"name":"项目一"
},
{
"id":"33978737-c722-4339-88a1-a9829dd4bca2",
"parentId":"5461ed61-543c-4ea1-9cb5-17b008e093a0",
"myorder":1,
"name":"课题一"
},
{
"id":"5461ed61-543c-4ea1-9cb5-17b008e093a0",
"parentId":"57e06272-eab4-4920-ae6a-25e055374851",
"myorder":1,
"name":"电子教案"
},
{
"id":"8d0723db-9087-4c83-8d0e-ab7f24ddf066",
"parentId":"6d460008-38f7-479d-b6d1-058ebc17dae3",
"name":"任务二",
"myorder":2
}
]

 var _data = ${videoList}
     // 将偏平化的数组转为树状结构 -- id为根节点
     function filterArray(data, id) {
         var fa = function(parentid) {
             var _array = [];
             for (var i = 0; i < data.length; i++) {
                 var n = data[i];
                 if (n.parentId === parentid) {
                     n.children = fa(n.id);
                     _array.push(n);
                 }
             }
             return _array;
         }
         return fa(id);
     }
 　　//根据myorder排序
     function _sort(data){
         for(var i =0; i<data.length; i++){
             _sort(data[i].children)
         }
         data.sort(function(a,b){
             return a.myorder>b.myorder
         })
     }

var data = filterArray(_data, id)
            _sort(data)