September 2017 Update

Task/Sorting-algorithms-Counting-sort/Kotlin/sorting-algorithms-counting-sort.kotlin

@@ -0,0 +1,22 @@
+// version 1.1.0
+
+fun countingSort(array: IntArray) {
+    if (array.isEmpty()) return
+    val min = array.min()!!
+    val max = array.max()!!
+    val count = IntArray(max - min + 1)  // all elements zero by default
+    for (number in array) count[number - min]++
+    var z = 0
+    for (i in min..max)
+        while (count[i - min] > 0) {
+            array[z++] = i
+            count[i - min]--
+        }
+}
+
+fun main(args: Array<String>) {
+    val array = intArrayOf(4, 65, 2, -31, 0, 99, 2, 83, 782, 1)
+    println("Original : ${array.asList()}")
+    countingSort(array)
+    println("Sorted   : ${array.asList()}")
+}