Question

我有一个Json动态数据对象。

[{"stock1":"aaaa","stock2":"bbbb"},{"stock1":"aaaa","stock2":"bbbb"},{"stock1":"aaaa","stock2":"bbbb"}]

我必须提供一些数据。

"identifier" : "userid"

然后，我尝试制作这样的代码。

Data.push({"identifier" : "userid"});

，结果是

[{"stock1":"aaaa","stock2":"bbbb"},{"stock1":"aaaa","stock2":"bbbb"},{"stock1":"aaaa","stock2":"bbbb"},{"identifier" : "userid"}]

但我的目标是

[{"stock1":"aaaa","stock2":"bbbb","identifier" : "userid"},{"stock1":"aaaa","stock2":"bbbb","identifier" : "userid"},{"stock1":"aaaa","stock2":"bbbb","identifier" : "userid"}]

如何将一些数据放入现有json数据中的特殊索引？

Answer 1

要更新/添加现有数组对象，您可以创建一个简单的 forEach 循环。

Stack snippet

var array = [{"stock1":"aaaa","stock2":"bbbb"},{"stock1":"aaaa","stock2":"bbbb"},{"stock1":"aaaa","stock2":"bbbb"}]

array.forEach(function(item) {
  item["identifier"] = "userid";
})

console.log(array)

Answer 2

使用export default combineReducers({ contactsList: dataReducer });函数为每个元素添加新的键值对

＆＃13;

reduce

＆＃13;

Answer 3

我认为map（）将完美地为此：

＆＃13;

var arr = [{"stock1":"aaaa","stock2":"bbbb"},{"stock1":"aaaa","stock2":"bbbb"},{"stock1":"aaaa","stock2":"bbbb"}]

var result = arr.reduce((r,s) => {
  r.push(Object.assign({}, s, {"identifier" : "userid"}));
  return r;
} , []);
console.log(result);

＆＃13;

Answer 4

你需要推送数组元素而不是数组本身：所以你需要循环这个JSONArray，然后为每个元素推送新变量，如：

    for(int x-0; x<Data.length; x++){
       Data[x].push({"identifier" : "userid"})
    }

Answer 5

试试这个。使用{"Protein":[ ... ],"Hec":[ ... ], "Lec":[ ... ], "F":[ ... ]}迭代现有数组数据，并使用Object.keys将新数据分配到每个级别：

Object.assign

以下是一些解释var Data = [{"stock1":"aaaa","stock2":"bbbb"},{"stock1":"aaaa","stock2":"bbbb"},{"stock1":"aaaa","stock2":"bbbb"}]; Data = Object.keys(Data).map(function (i) { return Object.assign({}, Data[i], {identifier: 1}); }); console.log(Data);用法的文档： https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign

在JSON中添加数组数据的新元素

5 个答案: