add selection sort on kotlin

02_selection_sort/kotlin/SeletionSortk.kt

@@ -0,0 +1,26 @@
+
+fun ArrayList<Int>.selectionSort(): ArrayList<Int> {
+    val sortedArray = arrayListOf<Int>()
+    for (i in 0 until size) {
+        val smallest = getSmallest()
+        sortedArray += this[smallest]
+        removeAt(smallest)
+    }
+    return sortedArray
+}
+
+fun ArrayList<Int>.getSmallest(): Int {
+    var smallest = this[0]
+    var index = 0
+    for (i in 1 until size) if (this[i] < smallest) {
+        smallest = this[i]
+        index = i
+    }
+    return index
+}
+
+
+fun main(args: Array<String>) {
+    val array = arrayListOf(0, 2, 5, 1, 8, 23, 31, 21, 93, 213, 31, 11, 1512, 231, 341, 516, 132, 322, 421, 643)
+    print("sort: ${array.selectionSort()}")
+}