kotlin-stdlib / kotlin.collections / sortWith

sortWith

Common
JS
Native
1.0
fun <T> Array<out T>.sortWith(comparator: Comparator<in T>)

Sorts the array in-place according to the order specified by the given comparator.

The sort is stable. It means that equal elements preserve their order relative to each other after sorting.

Common
JS
Native
1.0
fun <T> MutableList<T>.sortWith(comparator: Comparator<in T>)

Sorts elements in the list in-place according to the order specified with comparator.

The sort is stable. It means that equal elements preserve their order relative to each other after sorting.

JVM
1.0
fun <T> Array<out T>.sortWith(comparator: Comparator<in T>)

Sorts the array in-place according to the order specified by the given comparator.

The sort is stable. It means that equal elements preserve their order relative to each other after sorting.

JVM
1.0
fun <T> Array<out T>.sortWith(
    comparator: Comparator<in T>,
    fromIndex: Int = 0,
    toIndex: Int = size)
Native
1.3
fun <T> Array<out T>.sortWith(
    comparator: Comparator<in T>,
    fromIndex: Int = 0,
    toIndex: Int = size)

Sorts a range in the array in-place with the given comparator.

The sort is stable. It means that equal elements preserve their order relative to each other after sorting.

JVM
1.0
fun <T> MutableList<T>.sortWith(comparator: Comparator<in T>)

Sorts elements in the list in-place according to the order specified with comparator.

The sort is stable. It means that equal elements preserve their order relative to each other after sorting.

import kotlin.test.*

fun main(args: Array<String>) {
//sampleStart
// non-comparable class
class Person(val firstName: String, val lastName: String) {
    override fun toString(): String = "$firstName $lastName"
}

val people = mutableListOf(
    Person("Ragnar", "Lodbrok"),
    Person("Bjorn", "Ironside"),
    Person("Sweyn", "Forkbeard")
)

people.sortWith(compareByDescending { it.firstName })

// after sorting
println(people.joinToString()) // Sweyn Forkbeard, Ragnar Lodbrok, Bjorn Ironside
//sampleEnd
}