HackerRank Day 5: Arrow Functions 10 days of javascript solution

In this HackerRank Day 5: Arrow Functions 10 Days of the javascript problem we need to Complete the function in the editor. It has one parameter: an array, nums. It must iterate through the array performing one of the following actions on each element: 

1. If the element is even, multiply the element by 2.
2. If the element is odd, multiply the element by 3.

HackerRank Day 5: Arrow Functions 10 Days of javascript problem solution.

'use strict';

process.stdin.resume();
process.stdin.setEncoding('utf-8');

let inputString = '';
let currentLine = 0;

process.stdin.on('data', inputStdin => {
    inputString += inputStdin;
});

process.stdin.on('end', _ => {
    inputString = inputString.trim().split('\n').map(string => {
        return string.trim();
    });
    
    main();    
});

function readLine() {
    return inputString[currentLine++];
}

/*
 * Modify and return the array so that all even elements are doubled and all odd elements are tripled.
 * 
 * Parameter(s):
 * nums: An array of numbers.
 */
function modifyArray(nums) {
    var something = function(n){
        if(n%2==0)
            return n*2;
        else
            return n*3;
    }
    var newArray = nums.map(something);
    return newArray;
    
}


function main() {
    const n = +(readLine());
    const a = readLine().split(' ').map(Number);
    
    console.log(modifyArray(a).toString().split(',').join(' '));
}