打字稿从对象中选择ID

Question

我是Typescript的新手.我想从observable中选择id

这是我的观察

let myObj = [{
  "id": 1,
  "text": "Mary"
}, {
  "id": 2,
  "text": "Nancy"
}, {
  "id": 3,
  "text": "Paul"
}, {
  "id": 4,
  "text": "Cheryl"
}, {
  "id": 5,
  "text": "Frances"
}]

预期结果 :

let selectedIds = [1,2,3,4,5];

我可以在不创建数组并在for循环中推送id的情况下执行此操作.

Answer 1

用于Array#map将一个数组映射到另一个数组:

const myObj = [{"id":1,"text":"Mary"},{"id":2,"text":"Nancy"},{"id":3,"text":"Paul"},{"id":4,"text":"Cheryl"},{"id":5,"text":"Frances"}];

const selectedIds = myObj.map(({ id }) => id);

console.log(selectedIds);