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(() => [])

for (let flag = true, index = 0; flag; ) {
    flag = false
    items.forEach((v, i) => {
        const a = result[i]
        if (a.length < v.num) {
            a.push(arr[index++])
            flag = true
        }
    })
}

console.log(result)