export const shuffle = <T>(arr: readonly T[]): T[] => {
  const a = [...arr];
  for (let i = a.length - 1; i > 0; i--) {
    const j = Math.floor(Math.random() * (i + 1));
    [a[i], a[j]] = [a[j], a[i]];
  }
  return a;
};

// Usage
shuffle([1, 2, 3, 4, 5]);
// e.g., [3, 1, 5, 2, 4]