// Updated for libill // https://www.sololearn.com/Discuss/1492631 // kotlin: How to compare Comparable ? // https://code.sololearn.com/cNk7ItRZQCBC/?ref=app /** * if a bigger the b */ fun more(a: Char, b: Char): Boolean { if (a.compareTo(b) > 0) { return true } return false } fun main(args: Array) { println("Hello, World!") var arrayList = arrayListOf('F', 'C', 'D', 'A') //var arrayList = arrayListOf>() BubbleSort().bubbleSort(arrayList, {a:Char, b:Char->more(a,b)}) } class BubbleSort { fun bubbleSort(array: ArrayList, more: (T, T) -> Boolean): ArrayList { if (array?.size <= 1) { return array } for (i in array.size - 1 downTo 1) { for (j in 0 until i) { if (more(array[j], array[j + 1])) { exchange(array, j, j + 1) } } printArray(array.size - i, array) } return array } /** * change */ fun exchange(array: ArrayList, i: Int, j: Int) { var temp = array[i] array[i] = array[j] array[j] = temp } /** * print */ fun printArray(k: Int, array: ArrayList) { print("The "+ k +" result is ：") for (a in array) { print(" " + a) } println() } }

libill bubble fx