let arr1 = ['a','b','c','d'];
let arr2 = [1,4];//通過這個數(shù)組過濾掉arr1中索引為1跟4的選項
能用filter實現(xiàn)么
4
0
0
arr1 = arr1.filter((e,i) => arr2.indexOf(i)===-1)
下標(biāo)從0開始
