JavaScript/Sorts/QuickSort.js at feature/robust-iseven · sibalonecoding-code/JavaScript · GitHub

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/**

* @function QuickSort

* @description Quick sort is a comparison sorting algorithm that uses a divide and conquer strategy.

* @param {Integer[]} items - Array of integers

* @return {Integer[]} - Sorted array.

* @see [QuickSort](https://en.wikipedia.org/wiki/Quicksort)

function quickSort(items) {

const length = items.length

if (length <= 1) {

return items

}

const PIVOT = items[0]

const GREATER = []

const LESSER = []

for (let i = 1; i < length; i++) {

if (items[i] > PIVOT) {

GREATER.push(items[i])

} else {

LESSER.push(items[i])

}

const sorted = [...quickSort(LESSER), PIVOT, ...quickSort(GREATER)]

return sorted

}

export { quickSort }

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