假设我有一个对象:
elmo = {
color: 'red',
annoying: true,
height: 'unknown',
meta: { one: '1', two: '2'}
};
我想创建一个具有其属性子集的新对象。
// pseudo code
subset = elmo.slice('color', 'height')
//=> { color: 'red', height: 'unknown' }
我怎样才能实现这个目标?
最佳答案
使用对象解构和属性速记
const object = { a: 5, b: 6, c: 7 };
const picked = (({ a, c }) => ({ a, c }))(object);
console.log(picked); // { a: 5, c: 7 }
来自菲利普·科威施:
This is really just an anonymous function being called instantly. All of this can be found on the Destructuring Assignment page on MDN. Here is an expanded form
let unwrap = ({a, c}) => ({a, c});
let unwrap2 = function({a, c}) { return { a, c }; };
let picked = unwrap({ a: 5, b: 6, c: 7 });
let picked2 = unwrap2({a: 5, b: 6, c: 7})
console.log(picked)
console.log(picked2)
关于javascript - 如何获取 javascript 对象属性的子集,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/60088615/