map

Common
JVM
JS
Native
1.0
inline fun < T , R > Array < out T > . map (
transform : ( T ) -> R
) : List < R >

(source)
inline fun < R > ByteArray . map ( transform : ( Byte ) -> R ) : List < R >
(source)
inline fun < R > ShortArray . map (
transform : ( Short ) -> R
) : List < R >

(source)
inline fun < R > IntArray . map ( transform : ( Int ) -> R ) : List < R >
(source)
inline fun < R > LongArray . map ( transform : ( Long ) -> R ) : List < R >
(source)
inline fun < R > FloatArray . map (
transform : ( Float ) -> R
) : List < R >

(source)
inline fun < R > DoubleArray . map (
transform : ( Double ) -> R
) : List < R >

(source)
inline fun < R > BooleanArray . map (
transform : ( Boolean ) -> R
) : List < R >

(source)
inline fun < R > CharArray . map ( transform : ( Char ) -> R ) : List < R >
(source)
@ExperimentalUnsignedTypes inline fun < R > UIntArray . map (
transform : ( UInt ) -> R
) : List < R >

(source)
@ExperimentalUnsignedTypes inline fun < R > ULongArray . map (
transform : ( ULong ) -> R
) : List < R >

(source)
@ExperimentalUnsignedTypes inline fun < R > UByteArray . map (
transform : ( UByte ) -> R
) : List < R >

(source)
@ExperimentalUnsignedTypes inline fun < R > UShortArray . map (
transform : ( UShort ) -> R
) : List < R >

(source)

Returns a list containing the results of applying the given transform function to each element in the original array.

import kotlin.test.*

fun main(args: Array<String>) {
//sampleStart
val numbers = listOf(1, 2, 3)
println(numbers.map { it * it }) // [1, 4, 9]
//sampleEnd
}
Common
JVM
JS
Native
1.0
inline fun < T , R > Iterable < T > . map (
transform : ( T ) -> R
) : List < R >

(source)

Returns a list containing the results of applying the given transform function to each element in the original collection.

import kotlin.test.*

fun main(args: Array<String>) {
//sampleStart
val numbers = listOf(1, 2, 3)
println(numbers.map { it * it }) // [1, 4, 9]
//sampleEnd
}
Common
JVM
JS
Native
1.0
inline fun < K , V , R > Map < out K , V > . map (
transform : ( Entry < K , V > ) -> R
) : List < R >

(source)

Returns a list containing the results of applying the given transform function to each entry in the original map.

import kotlin.test.*
import java.util.*

fun main(args: Array<String>) {
//sampleStart
val peopleToAge = mapOf("Alice" to 20, "Bob" to 21)
println(peopleToAge.map { (name, age) -> "$name is $age years old" }) // [Alice is 20 years old, Bob is 21 years old]
println(peopleToAge.map { it.value }) // [20, 21]
//sampleEnd
}