kotlin-stdlib / kotlin.comparisons / reverseOrder

reverseOrder

Common
JVM
JS
Native
1.0
fun <T : Comparable<T>> reverseOrder(): Comparator<T>
(source)

Returns a comparator that compares Comparable objects in reversed natural order.

The natural order of a Comparable type here means the order established by its compareTo function.

import kotlin.test.*

fun main(args: Array<String>) {
//sampleStart
val list = listOf(4, null, 1, -2, 3)

val nullsFirstList = list.sortedWith(nullsFirst(reverseOrder()))
println(nullsFirstList) // [null, 4, 3, 1, -2]

val nullsLastList = list.sortedWith(nullsLast(reverseOrder()))
println(nullsLastList) // [4, 3, 1, -2, null]
//sampleEnd
}