【前端之日常工作】数组过滤：交集，差集

根据id数组获取对应的另一数组的数据

let list =[{id：1，name:'天'},{id：2，name:'气'},{id：3，name:'真'},{id：4，name:'好'}]
/*举例一*/
let ids1 = [1, 2]
let check1 = list .filter(item => ids1.some(ele => ele === item.id)); //取两数组的交集

/*举例二*/
let ids2 = [{id：1，name:'天'},{id：2，name:'气'}]
let check2 = list .filter(item => ids2.some(ele => ele.id === item.id)); //取两数组的交集
//或者
let check3 = list.filter(item => ids2.indexOf(item.name) > -1)

/*举例三*/
// 求两数组的差集
let check4 = list.filter(item => !ids2.some(ele => ele.id === item.id))