题目：
source = [{
id: 1,
pid: 0,
name: 'body'
}, {
id: 2,
pid: 1,
name: 'title'
}, {
id: 3,
pid: 2,
name: 'div'
}]
转换为: [{
id: 1,
pid: 0,
name: 'body',
children: [{
id: 2,
pid: 1,
name: 'title',
children: [{
id: 3,
pid: 1,
name: 'div'
}]
}
}]
代码实现：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=`, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>toTree</title>
</head>
<body>
<script>
var source = [{
id: 1,
pid: 0,
name: 'body'
}, {
id: 2,
pid: 1,
name: 'title'
}, {
id: 3,
pid: 1,
name: 'div'
}, {
id: 4,
pid: 3,
name: 'span'
}, {
id: 5,
pid: 3,
name: 'icon'
}, {
id: 6,
pid: 4,
name: 'subspan'
}]
function toTree(data) {
let result = []
if(!Array.isArray(data)) {
return result
}
data.forEach(item => {
delete item.children;
});
let map = {};
data.forEach(item => {
map[item.id] = item;
});
data.forEach(item => {
let parent = map[item.pid];
if(parent) {
(parent.children || (parent.children = [])).push(item);
} else {
result.push(item);
}
});
return result;
}
console.log(toTree(source))
</script>
</body>
</html>