递归

[xiaoweitongxue]

let arr = [
{ id: 1, name: '部门1', pid: 0 },
{ id: 2, name: '部门2', pid: 1 },
{ id: 3, name: '部门3', pid: 1 },
{ id: 4, name: '部门4', pid: 3 },
{ id: 5, name: '部门5', pid: 4 },
{ id: 6, name: '部门6', pid: 0 },
]
//用了个递归，菜鸟瑟瑟发抖
list2tree=(arr,id)=>{
let res = []
for(let i =0;i<arr.length;i++){
if(arr[i].pid==id){
res.push(arr[i])
arr[i].children=list2tree(arr,arr[i].id)
arr.splice(i,1)
--i
}
}
return res
}