如何将一个数组复制到另一个数组，其中一个属性是 object

Question

我有一个像这样的数组：

"data": [
    {
      "_id": {
        "uuid": "1",
        "date": "2022-01-25",
        "channel": "Teste1",
        "campaign": "teste1",
      },
      "received": 41683,
      "enqueued": 0,
    },
    {
       "_id": {
        "uuid": "1",
        "date": "2022-01-26",
        "channel": "Teste2",
        "campaign": "teste2",
      },
      "received": 314670,
      "enqueued": 0,
    },
]

我想创建或破坏这个数组并创建这样的东西：

"data": [
    {
      "_id": {
         "uuid": "1",
        "date": "2022-01-25",
        "channel": "Teste1",
        "campaign": "teste1",
      },
    },
    {
       "_id": {
        "uuid": "2",
        "date": "2022-01-26",
        "channel": "Teste2",
        "campaign": "teste2",
      },
    },
]

我怎样才能复制它？ 我如何在这个数组上使用解构？

Answer 1

Array.map通过数组，只返回每个object的_id节点

 const data = [ { "_id": { "uuid": "1", "date": "2022-01-25", "channel": "Teste", "campaign": "teste" }, "received": 41683, "enqueued": 0, }, { "_id": { "uuid": "1", "date": "2022-01-25", "channel": "Teste", "campaign": "teste"}, "received": 314670, "enqueued": 0, }, ]; const output = data.map((item) => { const { _id } = item; return { _id } }); console.log(output);

或只需 select _id节点并将其返回如下。

 const data = [ { "_id": { "uuid": "1", "date": "2022-01-25", "channel": "Teste", "campaign": "teste" }, "received": 41683, "enqueued": 0, }, { "_id": { "uuid": "1", "date": "2022-01-25", "channel": "Teste", "campaign": "teste"}, "received": 314670, "enqueued": 0, }, ]; const output = data.map(({ _id }) => ({ _id })); console.log(output);

Answer 2

使用map()你可以

 const data = [ { "_id": { "uuid": "1", "date": "2022-01-25", "channel": "Teste", "campaign": "teste" }, "received": 41683, "enqueued": 0, }, { "_id": { "uuid": "1", "date": "2022-01-25", "channel": "Teste", "campaign": "teste"}, "received": 314670, "enqueued": 0, }, ]; let result = data.map(e =>{ return { _id: e._id } }) console.log(result);