Javascript：如何在某些索引位置获取数组的值

Question

I have an array of values

arr = ["a","b","c","d"]

and I have another array of indexes

indexes = [0,2]

What is the best way to get the values of the array at these indexes ?

If I apply the method to the values above

it should return

["a","c"]

Answer 1

Use Array.map :

 arr = ["a","b","c","d"] indexes = [0,2] const res = indexes.map(e => arr[e]) console.log(res)