quick sort

quickSort.js

function quickSort(array) {
  if (array.length <= 1) return array
  const pivot = array[Math.floor(array.length / 2)]
  return [
    ...quickSort(array.filter(e => e < pivot)),
    ...array.filter(e => e === pivot),
    ...quickSort(array.filter(e => e > pivot))
  ]
}