怎么用filter实现这种过滤

Question

let arr1 = ['a','b','c','d'];let arr2 = [1,4];//通过这个数组过滤掉arr1中索引为1跟4的选项能用filter实现么

Answer 1

let arr1 = ['a','b','c','d'];

let arr2 = [1,4];

arr1.filter((value,index)=>{

    return arr2.indexOf(index) === -1;

});