First-class function factory.js

// DESCRIPTION:
// Write a function, factory, that takes a number as its parameter and returns another function.

// The returned function should take an array of numbers as its parameter, and return an array of those numbers multiplied by the number that was passed into the first function.

// In the example below, 5 is the number passed into the first function. So it returns a function that takes an array and multiplies all elements in it by five.

// Translations and comments (and upvotes) welcome!

// Example
// var fives = factory(5);       // returns a function - fives
// var myArray = [1, 2, 3];
// fives(myArray);               //returns [5, 10, 15];

function factory(x){
    return function mul(myArray){
      let y= []
      for (let index= 0; index< myArray.length; index++){
        y.push(myArray[index] * x)
      }
      return y
    }
    
}