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QuickSort.kt
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QuickSort.kt
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// See https://reflectoring.io/quick-sort-in-kotlin/
fun quickSort(arr: IntArray, low: Int, high: Int) {
if (low < high) {
val pivotIndex = partition(arr, low, high)
quickSort(arr, low, pivotIndex - 1)
quickSort(arr, pivotIndex + 1, high)
}
}
fun partition(arr: IntArray, low: Int, high: Int): Int {
val pivot = arr[high]
var i = low - 1
for (j in low until high) {
if (arr[j] <= pivot) {
i++
swap(arr, i, j)
}
}
swap(arr, i + 1, high)
return i + 1
}
fun swap(arr: IntArray, i: Int, j: Int) {
val temp = arr[i]
arr[i] = arr[j]
arr[j] = temp
}
fun main() {
val array = intArrayOf(64, 34, 25, 12, 22, 11, 90)
println("Original Array: ${array.joinToString(", ")}")
quickSort(array, 0, array.size - 1)
println("Sorted Array: ${array.joinToString(", ")}")
}