Javascript: How to get values of an array at certain index positions

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"]

user_14251221 · Answer

Use Array.map:

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

indexes = [0,2]

const res = indexes.map(e => arr[e])

console.log(res)