Arrow Function || JS Hackerrank Solution

Objective

In this challenge, we practice using arrow functions. Check the attached tutorial for more details.

Task

Complete the function in the editor. It has one parameter: an array, . It must iterate through the array performing one of the following actions on each element:

• If the element is even, multiply the element by .
• If the element is odd, multiply the element by .

The function must then return the modified array.

Input Format

The first line contains an integer, , denoting the size of .
The second line contains  space-separated integers describing the respective elements of .

Constraints

• , where  is the  element of .

Output Format

Return the modified array where every even element is doubled and every odd element is tripled.

Sample Input 0

5
1 2 3 4 5

Sample Output 0

3 4 9 8 15

Explanation 0

Given , we modify each element so that all even elements are multiplied by  and all odd elements are multipled by . In other words, . We then return the modified array as our answer.

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++];

}

function modifyArray(nums) {

    

    for(var i=0;i<nums.length;i++){

        if(nums[i]%2==0){

            nums[i]=nums[i]*2;

        }else{

            nums[i]=nums[i]*3;

        }

    }

    return nums;

    

}