js数组排序处理
问题：
给定两个数组arr和items，其中arr包含可排序对象，items包含具有id和num属性的对象。根据items中num的值，按竖向顺序从arr中获取所需的数据，按id的顺序。
期望格式：
let result= [
[{price: 5, useruid: 0, item_name: '测试3'},{price: 39, useruid: 0, item_name: '测试2'},]
[{price: 20, useruid: 0, item_name: '测试2'},{price: 43, useruid: 0, item_name: '测试1'},{price: 66, useruid: 0, item_name: '测试2'},]
[{price: 23, useruid: 0, item_name: '测试1'},{price: 55, useruid: 0, item_name: '测试3'},{price: 72, useruid: 0, item_name: '测试3'},{price: 82, useruid: 0, item_name: '测试3'},{price: 97, useruid: 0, item_name: '测试3'},]
]解决方案：
const result: (typeof arr)[0][][] = new Array(items.length)
.fill(0)
.map(() =youjiankuohaophpcn [])
for (let flag = true, index = 0; flag; ) {
flag = false
items.forEach((v, i) =youjiankuohaophpcn {
const a = result[i]
if (a.length zuojiankuohaophpcn v.num) {
a.push(arr[index++])
flag = true
}
})
}
console.log(result) 
