Having difficulties using stdin with Node.js

JavaScript
1

Hey everyone, I’m trying to solve one of the data structure problems on HackerRank. In this problem we’re basically given an array of numbers and asked to rotate the array a given number of rotations to the left.

I’ve produced a solution that works in Repl.it.

function leftRotation (arr, rotations) {
  let splicedValue;
  for (let i = 0; i < rotations; i+=1) {
splicedValue = arr.splice(0, 1).join("");
arr.push(parseInt(splicedValue))
  }
  return arr
}

leftRotation([5, 1, 2, 3, 4], 3)

Unfortunately, I can’t pass the user tests on HackerRank because I’m not sure how I should convert my solution to using stdout, and especially stdin (to receive the varying inputs I need to pass the various user tests on HackerRank). Do you have any ideas on what argument I should be passing to my function when I call it?

I’ve already tried stdin, inputStdin, inputString, etc, and I just can’t figure out what else I could try. I really appreciate any help you may be able to offer.

function leftRotation(arr, rotations) {
    let splicedValue;
    for (let i = 0; i < rotations; i += 1) {
        splicedValue = arr.splice(0, 1).join("");
        arr.push(parseInt(splicedValue))
    }
    process.stdout.write(`${arr}`)
}

leftRotation(arr, rotations) //  <-- I need help here.