sayoko06的博客

直接上代码，用到了filter和somelet arrA = [{id:1,age:21},{id:2,age:22},{id:3,age:23},{id:4,age:24}]let arrB = [{id:1,age:21},{id:2,age:22}]let arrC = arrA.filter(a=>!arrB.some(b=>b.id==a.id))conso...

1、将一个普通数组映射为对象数组将[1,2,3] 映射为 [{id: 1}, {id: 2}, {id: 3}]var arr=[1,2,3];arr=arr.map(item=> { // item是数组中的每一个值 return {id:item}})console.log(arr); //[{id: 1}, {id: 2}, {id: 3}]3.将一个对象数组映...