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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Build tree array from flat array in javascript</title>
</head>
<body>
<script>
//http://stackoverflow.com/questions/18017869/build-tree-array-from-flat-array-in-javascript
var nodes = [
// {
// "id": "12",
// "parentId": "0",
// "text": "Man",
// "level": "1",
// "children": null
// },
// {
// "id": "6",
// "parentId": "12",
// "text": "Boy",
// "level": "2",
// "children": null
// },
// {
// "id": "7",
// "parentId": "12",
// "text": "Other",
// "level": "2",
// "children": null
// },
// {
// "id": "9",
// "parentId": "0",
// "text": "Woman",
// "level": "1",
// "children": null
// },
// {
// "id": "11",
// "parentId": "9",
// "text": "Girl",
// "level": "2",
// "children": null
// }
{
"remark": null,
"createBy": 0,
"createUser": "admin",
"updateBy": null,
"updateUser": null,
"createDate": 1473233240000,
"updateDate": null,
"deleteDate": null,
"isDeleted": null,
"version": 0,
"id": 4,
"no": "JNAJ",
"name": "济南安监部门",
"organizationAbb": "济南安监",
"netregionId": 7,
"sortId": 0,
"parentId": 4,
"isDirectlySupervise": false,
"isGeneralSupervise": true,
"isIndustrySupervise": false,
"respPerson": 61,
"respPhone": "18273367906",
"respName": null
},
{
"remark": null,
"createBy": 0,
"createUser": "admin",
"updateBy": null,
"updateUser": null,
"createDate": 1473233240000,
"updateDate": null,
"deleteDate": null,
"isDeleted": null,
"version": 0,
"id": 6,
"no": "JNAJSJGBM",
"name": "济南市直属监管部门",
"organizationAbb": "济南直属",
"netregionId": 7,
"sortId": 0,
"parentId": 4,
"isDirectlySupervise": true,
"isGeneralSupervise": false,
"isIndustrySupervise": false,
"respPerson": 64,
"respPhone": "18966662020",
"respName": null
},
{
"remark": null,
"createBy": 0,
"createUser": "admin",
"updateBy": null,
"updateUser": null,
"createDate": 1473233240000,
"updateDate": null,
"deleteDate": null,
"isDeleted": null,
"version": 0,
"id": 7,
"no": "JNAJHJGBM",
"name": "济南市综合监管部门",
"organizationAbb": "济南综合",
"netregionId": 7,
"sortId": 0,
"parentId": 4,
"isDirectlySupervise": false,
"isGeneralSupervise": true,
"isIndustrySupervise": false,
"respPerson": 67,
"respPhone": "13266666666",
"respName": null
},
{
"remark": null,
"createBy": 0,
"createUser": "admin",
"updateBy": null,
"updateUser": null,
"createDate": 1473233240000,
"updateDate": null,
"deleteDate": null,
"isDeleted": null,
"version": 0,
"id": 9,
"no": "JNAJYJGBM",
"name": "济南市行业监管部门",
"organizationAbb": "济南行业",
"netregionId": 7,
"sortId": 0,
"parentId": 4,
"isDirectlySupervise": false,
"isGeneralSupervise": false,
"isIndustrySupervise": true,
"respPerson": 68,
"respPhone": "13288888888",
"respName": null
}
];
//当根节点 ID 不为 0 则根据ID排序后取最小ID 为根节点
nodes.sort(function(first, second){
if (first.id > second.id) {
return 1;
}
if (first.id < second.id) {
return -1;
}
// a 必须等于 b
return 0;
});
// console.log(nodes);
var map = {}, node, roots = [];
if(nodes[0].id!==0){
roots = nodes[0];
}
for (var i = 0; i < nodes.length; i += 1) {
node = nodes[i];
node.children = [];
map[node.id] = i; // use map to look-up the parents
if (node.parentId !== 0) {
node.parentId!==node.id ? nodes[map[node.parentId]].children.push(node) : null;
} else {
roots.push(node);
}
}
console.log(nodes);
console.log(roots); // <-- there's your tree
</script>
</body>
</html>