function traverse(obj) {
if (obj instanceof Array) {
for (var i=0; i
/*
//这是我要的结果
var arr = [
{"parent":null, "name":"user1"},
{"parent":"user1","expanded": true, items:[
{"name": "user2","parent": "user1"},
{"name": "user3","parent": "user1"},
]},
{"parent":"user2","expanded": true, items:[
{"name": "user4","expanded": true, "parent": "user2",items:[
{"name": "user5","parent": "user4"}
]},
]}
];
*/
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