~~~
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.js"></script>
</head>
<body>
<script>
function Ajax(collback){
$.ajax({
type:"get",
url:"./abc.json",
dataType:"json",
success:function(res){
collback(res)
}
})
}
Ajax(res => {
let arr = res;
// arr为要处理的数组 a为数组中code的长度 (code的长度必须有规律)
function aa(arr, a) {
let arrlist = []
if (a > 9) {
return arrlist
} else {
arr.forEach(ele => {
if (ele.code.length == a ) {
let item = {}
item.name = ele.name;
item.code = ele.code;
let readylist=aa(arr,a+3);
item.children=changechild(item.code,readylist)
arrlist.push(item)
}
});
return arrlist
}
}
//过滤子数组 e为上一级的code arr为要过滤的数组
function changechild(e,arr){
let news=[]
for (let i = 0; i < arr.length; i++)
if(arr[i].code.startsWith(e)){
news.push(arr[i])
}
return news
}
let a = aa(arr, 3)
console.log(a)
})
//递归：首先递归一定会有迭代条件，当不满足情况直接return。满足条件然后进行数据处理（在数据处理的时候调用自身），把最总的结果return出去
</script>
</body>
</html>
~~~
