Shuffle the elements of an array

example.js

const shuffle = require('./shuffle')

const example = [1, 2, 3]

const shuffled = shuffle(example)

/*
  shuffled can be any of these:
  - [1, 2, 3]
  - [1, 3, 2]
  - [2, 1, 3]
  - [2, 3, 1]
  - [3, 1, 2]
  - [3, 2, 1]
*/

shuffle.js

function shuffle(array) {
  const copy = [...array]

  return copy.sort(() => Math.random() - 0.5)
}

module.exports = shuffle