Shuffle an array

Sourced from here:

const shuffle = array => {
  var currentIndex = array.length, temporaryValue, randomIndex

  // While there remain elements to shuffle...
  while (0 !== currentIndex) {
    // Pick a remaining element...
    randomIndex = Math.floor(Math.random() * currentIndex)
    currentIndex -= 1

    // And swap it with the current element
    temporaryValue = array[currentIndex]
    array[currentIndex] = array[randomIndex]
    array[randomIndex] = temporaryValue
  }
  return array
}

// Used like so
let arr = [2, 11, 37, 42]
arr = shuffle(arr)
console.log(arr)