jack.js

const playlist = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

let N = process.argv[2] || 10;

function shuffle(a) {
  const newA = a.slice(); // Copy array
  for (let i = newA.length; i; i--) {
    let j = Math.floor(Math.random() * i);
    [newA[i - 1], newA[j]] = [newA[j], newA[i - 1]];
  }
  return newA;
}

function playSound(sound) {
  console.log(`Playing ${sound}`)
}

console.log(`Going to play ${N} times`)

let last;
for (let i = 0; i < N; i++) {
  let shuffled = shuffle(playlist);
  while (shuffled[0] == last) {
    console.log(`DETECTED DUPLICATE, RESHUFFLNG ${shuffled}`);
    shuffled = shuffle(playlist);
  }
  console.log(`SHUFFLED: ${shuffled}`)
  for (let sound of shuffled) {
    playSound(sound)
    last = sound;
  }
}