Question

是否有一种快速稳定的方法来从json Doc数组中删除所有键值对。在我的情况下，我从数据库返回的数据包含更多字段，然后我想向用户显示，因此我想查询我的数据库，并在将json返回给客户端之前查看他应该获得什么密钥。在此示例中，数据具有3个键，FirstName，LastName和dob我将如何删除json中的所有dob键和值，如果我必须删除多个键值对，那么当您这样做时会有所不同吗？

{
"result":[
   {
       "FirstName": "Test1",
       "LastName":  "User",
       "dob":  "01/01/2011"
   },
   {
       "FirstName": "user",
       "LastName":  "user",
       "dob":  "01/01/2017"
   },
   {
       "FirstName": "Ropbert",
       "LastName":  "Jones",
       "dob":  "01/01/2001"
   },
   {
       "FirstName": "hitesh",
       "LastName":  "prajapti",
       "dob":  "01/01/2010"
   }

] }

Answer 1

在遍历数据时，可以在obj上使用delete运算符。

let data = {
  "result": [{
      "FirstName": "Test1",
      "LastName": "User",
      "dob": "01/01/2011"
    },
    {
      "FirstName": "user",
      "LastName": "user",
      "dob": "01/01/2017"
    },
    {
      "FirstName": "Ropbert",
      "LastName": "Jones",
      "dob": "01/01/2001"
    },
    {
      "FirstName": "hitesh",
      "LastName": "prajapti",
      "dob": "01/01/2010"
    }
  ]
}

// @param keys: an array of keys to remove
function removeKeyValue(obj, keys) {
  obj.forEach(currObj => {
    keys.forEach(key => {
      delete currObj[key];
    });
  });
}

removeKeyValue(data.result, ["dob", "LastName"]);
console.log(data.result);

如何从NodeJS中的JSON文档数组中删除密钥

1 个答案: