如何从数组对象中提取键值

Question

我有这样的数组对象：

var arr = [{id: 1, url: 'something'},{id: 2, url: 'something2'}];

我想要这样的输出：

[{id:1}, {id:2}]

提前致谢

Answer 1

只需使用Array#map

const arr = [{id: 1, url: 'something'},{id: 2, url: 'something2'}];
const mapped = arr.map(({id}) => ({ id }));

console.log(mapped);

以简单的形式

const arr = [{id: 1, url: 'something'},{id: 2, url: 'something2'}];
const mapped = arr.map(item => { return { id: item.id };});

console.log(mapped);