打字稿从对象中选择编号 [英] Typescript Select Ids from object

问题描述

我是Typescript的新手.我想从可观察的位置中选择ID

I am new to Typescript. I want to select ids from observable

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];

是否可以在不创建数组并将ID推入for循环的情况下执行此操作?

Can I do this without creating an array and pushing the ids in a for loop.

推荐答案

使用Array#map将一个数组映射到另一个数组:

Use Array#map to map one array to another:

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);

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