javascript如何动态地将子字典附加到父字典

Question

我有一个像这样的 Javascript 对象:

const childDict = {
  address: {
    zip: "GGHG654",
    city: "Morocco",
    number: 40
  }
}

我想在循环中动态地将其添加到另一个父字典中，如下所示:

let parentDict = {}

for(let i = 0 ; i < 3; i++){
  parentDict["place" + i] = childDict
}

所以最后我得到了这样的一个字典:

{
  place0: {
    address: {
      zip: "GGHG654",
      city: "Morocco",
      number: 40
    }
  },
  place1: {
    address: {
      zip: "GGHG654",
      city: "Morocco",
      number: 40
    }
  }
}

然而，for 循环给了我一个编译错误:

Element implicitly has an 'any' type because expression of type 'string' can't be used to index type '{}'.
  No index signature with a parameter of type 'string' was found on type '{}'.

Answer 1

您只需向父字典添加适当的接口(interface)，因为 typescript 会根据初始值自动分配类型，该初始值没有任何键

interface IParentDict {
    [key: string]: any; // possibly change any to the typeof child dict
}
const parentDict: IParentDict = {};