Beginner - Lost Without a Map.js

/*
Description:
Given an array of integers, return a new array with each value doubled.

For example:

[1, 2, 3] --> [2, 4, 6]

For the beginner, try to use the map method - it comes in very handy quite a lot so is a good one to know.
*/

function maps(x){
  return x.map(n => n * 2);
}