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37
Sorts/QuickSort.js
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37
Sorts/QuickSort.js
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/*
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* Quick sort is a comparison sorting algorithm that uses a divide and conquer strategy.
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* For more information see here: https://en.wikipedia.org/wiki/Quicksort
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*/
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function quickSort (items) {
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var length = items.length
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if (length <= 1) {
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return items
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}
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var PIVOT = items[0]
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var GREATER = []
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var LESSER = []
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for (var i = 1; i < length; i++) {
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if (items[i] > PIVOT) {
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GREATER.push(items[i])
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} else {
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LESSER.push(items[i])
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}
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}
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var sorted = quickSort(LESSER)
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sorted.push(PIVOT)
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sorted = sorted.concat(quickSort(GREATER))
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return sorted
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}
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// Implementation of quick sort
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var ar = [0, 5, 3, 2, 2]
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// Array before Sort
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console.log(ar)
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ar = quickSort(ar)
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// Array after sort
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console.log(ar)
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