三层取值的问题
const address = [
{
id: 1,
name: '北京市',
children: [
{
id: 11,
name: '海淀区',
children: [
{
id: 111,
name: '中关村',
}
]
},
{
id: 12,
name: '朝阳区',
},
],
},
{
id: 2,
name: '河北省'
}
]
function getCidList(val, id) {
let cid_list = []
val.forEach((item, index) => {
if (item.id == id) {
cid_list = [item.name]
return false
} else {
if (item.children) {
let newCid_list = [item.id]
let list = nodefun(item.children, id, newCid_list)
if (list) {
cid_list = list
}
}
}
})
// 递归函数
function nodefun(newVal, newId, newCid_list) {
let flag = false
newVal.forEach(j => {
if (j.id == newId) {
newCid_list.push(j.name)
flag = true
} else {
if (j.children) {
let cid_list = JSON.parse(JSON.stringify(newCid_list))
cid_list.push(j.name)
let list = nodefun(j.children, newId, cid_list)
if (list) {
newCid_list = list
flag = true
}
}
}
})
if (flag) {
return newCid_list
}
}
return cid_list
}
function getNameById(address,num){
var a = getCidList(address,num)
return a[a.length-1];
}
getNameById(address,num);
