kotlin-stdlib/kotlin.comparisons/naturalOrder

naturalOrder

fun <T : Comparable<T>> naturalOrder(): Comparator<T>(source)

Returns a comparator that compares Comparable objects in natural order.

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

Since Kotlin

1.0

Samples

import kotlin.test.*

fun main() { 
   //sampleStart 
   val list = listOf("aa", "b", "bb", "a")

val lengthThenNatural = compareBy<String> { it.length }
    .then(naturalOrder())

val sorted = list.sortedWith(lengthThenNatural)

println(sorted) // [a, b, aa, bb] 
   //sampleEnd
}
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val list = listOf("aa", "b", "bb", "a")
val lengthThenNatural = compareBy<String> { it.length }
    .then(naturalOrder())
val sorted = list.sortedWith(lengthThenNatural)
println(sorted) // [a, b, aa, bb] 
Open in Playground →
Target: JVMRunning on v.2.1.20

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