sortedArray

Returns an array with all elements of this array sorted according to their natural sort order.

fun <T : Comparable<T>> Array<T>.sortedArray(): Array<T>(source)

val unsorted = arrayOf(3, 1, 4, 1, 5)
val sorted = unsorted.sortedArray()
println(sorted.contentToString())  // prints [1, 1, 3, 4, 5]

Source