问题描述
let x = [
{id: 1,name: 'A',age: 34.. lots of other properties},{id: 2,name: 'B',age: 17.. },{id: 3,name: 'C',age: 54.. }
]
我怎样才能从中得到这个输出:
let output = [
{id: 1,name: 'A'},name: 'B'},name: 'C'}
]
我的意思是,我可以遍历它,并将新对象推送到新数组中。但我在想是否有更好的方法来做到这一点..
解决方法
更一般地说,对于任何属性集,这个想法在 lodash 和下划线中被称为“pick”和“pluck”...
let x = [
{id: 1,name: 'A',age: 34 },{id: 2,name: 'B',age: 17 },{id: 3,name: 'C',age: 54 }
]
function pick(object,...attributes) {
const filtered = Object.entries(object).filter(([k,v]) => attributes.includes(k))
return Object.fromEntries(filtered);
}
function pluck(array,...attributes) {
return array.map(el => pick(el,...attributes))
}
console.log(pluck(x,'id','name'))
您可以使用.map
let x = [
{id: 1,age: 34.,},age: 17.,age: 54.,}
];
console.log(x.map(({id,name}) => ({id,name})));