将一个对象附加到另一个

Question

我有两个JSON对象，我想将newData附加到existingData。

existingData = {"School Name" : "Albert"}
newData = {"Teacher Name" : "Ms. Mithcell"}

这是我想要的输出：

existingData = {"School Name" : "Albert" , "Teacher Name" : "Ms. Mithcell"};

我该怎么做？

Answer 1

JavaScript具有Object.assign功能。

请参见https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign

existingData = {"School Name" : "Albert"}
newData = {"Teacher Name" : "Ms. Mithcell"}

Object.assign(existingData, newData) 

console.log(existingData); // {School Name: "Albert", Teacher Name: "Ms. Mithcell"}

Object.assign（originalObject，newObject）将返回合并了newObject的originalObject。

Answer 2

对于JavaScript其object而不是像dictionary：P这样的python，只需使用Spread语法即可完成工作。

existingData = {"School Name" : "Albert"}
newData = {"Teacher Name" : "Ms. Mithcell"}
result = {...existingData, ...newData};
console.log(result);

Answer 3

您可以通过这种方式来采用更传统的方法：

existingData = {"School Name" : "Albert"};
newData = {"Teacher Name" : "Ms. Mithcell"};

var new_keys = Object.keys(newData);

for (var i = 0; i < new_keys.length; i++){
  existingData[new_keys] = newData[new_keys[i]];
}

console.log(existingData);