Generate directed pairs for christmas gifts

gifts.js

const PEOPLE = [
  { name: 'John Doe', email: 'johndoe@gmail.com' },
  { name: 'Lea' },
  { name: 'Bob' },
];

/**
 * Return a new list shuffled.
 *
 * @param originalList {Array<Object>}
 * @return {*}
 */
function shuffleList(originalList) {
  const newList = [...originalList];
  for (let i = newList.length - 1; i > 0; i--) {
    const rand = Math.floor(Math.random() * (i + 1));
    [newList[i], newList[rand]] = [newList[rand], newList[i]];
  }
  return newList;
}

/**
 * Return pairs.
 *
 * @param list {Array<Object>}
 */
function createDirectedPairs(list) {
  return list.map((p, i, arr) => [p, arr[i + 1] || arr[0]]);
}

/**
 * console.log Pairs
 *
 * @param pairs {Array<Object>}
 */
function logPairs(pairs) {
  pairs
    .map(([src, dest]) => `${src.name} offre à ${dest.name}`)
    .forEach(str => console.log(str));
}

function main() {
  const shuffled = shuffleList(PEOPLE);
  const pairs = createDirectedPairs(shuffled);

  logPairs(pairs);
}


main();