关于数据转换处理的问题

Question

如果数据有问题可以在评论区提出来

```javascript

data:[

{
        "userId":"123456",
        "names": [
          {
            "nums": [
              "1",
              "2",
              "3"
            ],
            "id": "111",
            "name": "aa"
          },
          {
            "nums": [
              "4"
            ],
            "id": "222",
            "name": "bb",
           
          },
          {
            "nums": [
              "2"
            ],
            "id": "333",
            "name": "cc"
          }
        ],
        "date": "2023-02-13 17:51:12"
      },
{
        "userId":"1234567",
        "names": [
          {
            "nums": [
              "1",
              "2",
              "3"
            ],
            "id": "111",
            "name": "aa"
          },
          {
            "nums": [
              "4"
            ],
            "id": "222",
            "name": "bb",
           
          },
          {
            "nums": [
              "2"
            ],
            "id": "333",
            "name": "cc"
          }
        ],
        "date": "2023-02-13 17:51:12"
      },

]

上面的数据把arr这个数组的每一项与id和name重新组成一个对象,

data:[

{
        "userId":"123456",
        "names": [
          {
            "num": "1",
            "id": "111",
            "name": "aa"
          },
          {
            "num": "2",
            "id": "111",
            "name": "aa"
          },
          {
            "num": "3",
            "id": "111",
            "name": "aa"
          },
          
          {
            "num": "4",
            "id": "222",
            "name": "bb",
           
          },
          {
            "num": "2",
            "id": "333",
            "name": "cc"
          }
        ],
        "date": "2023-02-13 17:22:15"
      },
]

```

Answer 1

基于Monster 组和GPT的调写：

• 把data数组中的每个对象的names字段中的nums数组展开，每个nums数组中的元素分别与其对应的id和name组成一个新的对象。以下是一个用JavaScript实现这个功能的简单方法：
  ​用JavaScript实现这个功能的简单方法：

const data=[
{
        "userId":"123456",
        "names": [
          {
            "nums": [
              "1",
              "2",
              "3"
            ],
            "id": "111",
            "name": "aa"
          },
          {
            "nums": [
              "4"
            ],
            "id": "222",
            "name": "bb",
          },
          {
            "nums": [
              "2"
            ],
            "id": "333",
            "name": "cc"
          }
        ],
        "date": "2023-02-13 17:51:12"
      },
{
        "userId":"1234567",
        "names": [
          {
            "nums": [
              "1",
              "2",
              "3"
            ],
            "id": "111",
            "name": "aa"
          },
          {
            "nums": [
              "4"
            ],
            "id": "222",
            "name": "bb",
          },
          {
            "nums": [
              "2"
            ],
            "id": "333",
            "name": "cc"
          }
        ],
        "date": "2023-02-13 17:51:12"
      },
]

const transformedData = data.map(item => {
  const { userId, date, names } = item;
  const newNames = names.flatMap(({ id, name, nums }) => 
    nums.map(num => ({ num, id, name }))
  );
  return { userId, date, names: newNames };
});

console.log(transformedData);