arrays.js

'use strict';

const sample = (array) => {
  const index = Math.floor(Math.random() * array.length);
  return array[index];
};

const shuffle = (array) => {
  for (let i = array.length - 1; i > 0; i--) {
    const j = Math.floor(Math.random() * (i + 1));
    [array[i], array[j]] = [array[j], array[i]];
  }
  return array;
};

module.exports = { sample, shuffle };