特定 json 的打字稿接口

Question

I wonder, how to create ts interface for this kind of JSON:

  "Cities": {

        "NY": ["New York", [8000, 134]],

        "LA": ["Los Angeles", [4000, 97]],

    }

I dont knot how to create this nested arrays and unique label.

Answer 1

You can declare the elements an array will contains:

interface IData {
  [key: string]: [
    string,
    [number, number]
  ];
}

[number, number] indicates the array contains exactly 2 elements of type number . The notation differs from number[] which indicates an array of number .