javascript - 向 JSON 对象添加方括号

Question

我从我的服务器获取此 JSON。但要使用此 JSON，我需要向 MH 对象添加方括号。我怎样才能做到这一点。我尝试了 .map 但我没有让它为我工作。有没有更好的解决办法。或者在那里使用 .map 。如果是的话，你能告诉我如何做到这一点的提示吗？或者有更好的解决方案吗？

{
    "PAD": [
        {
            "PADPS286": "Dampf",
            "PADPS124": "Hans",
            "PADPS60": "2018-05-01",
            "PADPS143": "1",
            "MH": {
                "MHVSS1": [
                    {}
                ],
                "MHDIRW214": 2017,
                "MHDIRW215": 2018,
                "birthdate": "2018-05-01",
                "MHDIRW129 ": "0"
            }
        },
        {
            "PADPS286": "Snow",
            "PADPS124": "Jon",
            "PADPS60": "2077-05-01",
            "PADPS143": "",
            "MH": {
                "MHVSS1": [
                    {}
                ],
                "MHDIRW214": 4,
                "MHDIRW215": 4,
                "birthdate": "2077-05-01",
                "MHDIRW129 ": "0"
            }
        }
    ]
}

我需要这个带有方括号的 JSON 围绕 MH 对象

{
    "PAD": [
        {
            "PADPS286": "Dampf",
            "PADPS124": "Hans",
            "PADPS60": "2018-05-01",
            "PADPS143": "1",
            "MH": [{
                "MHVSS1": [
                    {}
                ],
                "MHDIRW214": 2017,
                "MHDIRW215": 2018,
                "birthdate": "2018-05-01",
                "MHDIRW129 ": "0"
            }]
        },
        {
            "PADPS286": "Snow",
            "PADPS124": "Jon",
            "PADPS60": "2077-05-01",
            "PADPS143": "",
            "MH": [{
                "MHVSS1": [
                    {}
                ],
                "MHDIRW214": 4,
                "MHDIRW215": 4,
                "birthdate": "2077-05-01",
                "MHDIRW129 ": "0"
            }
        ]}
    ]
}

Answer 1

这并不是真正的“添加方括号”，而是将“MH”对象包装在数组中。

无论如何，这里有一个 .map 语句可以为您完成此操作(不会改变原始数据，因此出现 Object.assign 恶作剧):

data.PAD = data.PAD.map((padObj) => Object.assign({}, padObj, {MH: [padObj.MH]}));

基本上，对于 PAD 数组中的每个条目，我们都会合并其中的三个对象:

• 一个新的空对象{}
• 原始 padObj 条目
• 一个小对象，仅将原始 padObj 中的 MH 元素封装在数组中。

输出符合预期:

{
  "PAD": [
    {
      "PADPS286": "Dampf",
      "PADPS124": "Hans",
      "PADPS60": "2018-05-01",
      "PADPS143": "1",
      "MH": [
        {
          "MHVSS1": [{}],
          "MHDIRW214": 2017,
          "MHDIRW215": 2018,
          "birthdate": "2018-05-01",
          "MHDIRW129 ": "0"
        }
      ]
    },
    {
      "PADPS286": "Snow",
      "PADPS124": "Jon",
      "PADPS60": "2077-05-01",
      "PADPS143": "",
      "MH": [
        {
          "MHVSS1": [{}],
          "MHDIRW214": 4,
          "MHDIRW215": 4,
          "birthdate": "2077-05-01",
          "MHDIRW129 ": "0"
        }
      ]
    }
  ]
}