sayoko06的博客

直接上代码，用到了filter和some let 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...