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test.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<script>
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'
}
]
// 请实现该函数
// 输入：getNameById(address, 2)，输出："河北省"
// 输入：getNameById(address, 111)，输出："中关村"
// 输入：getNameById(address, 32)，输出："" （未查找到，输出空字符串）
function getNameById(address, id) {
// 在这里实现你的代码
let res = ''
for (let i = 0; i < address.length; i++) {
const item = address[i];
if (item.id == id) {
res = item.name
}
if (item.children && item.children.length > 0) {
res = getNameById(item.children, id)
}
}
return res;
}
console.log(getNameById(address, 2));
console.log(getNameById(address, 111));
console.log(getNameById(address, 32));
var a1 = [{
name: 'buyi',
age: 18
}]
var a2 = [{
name: 'buyi2',
age: 182
}, {
name: '333',
age: 333
}]
let mergeTwoarr = (a1, a2) => {
a2.map(item => {
a1.push(item)
})
console.log('结果是', a1)
return a1
}
mergeTwoarr(a1, a2)
</script>
</body>
</html>