lastOrNull

Common
JVM
JS
Native
1.0
fun <T> Array<out T>.lastOrNull(): T?
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fun ByteArray.lastOrNull(): Byte?
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fun ShortArray.lastOrNull(): Short?
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fun IntArray.lastOrNull(): Int?
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fun LongArray.lastOrNull(): Long?
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fun FloatArray.lastOrNull(): Float?
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fun DoubleArray.lastOrNull(): Double?
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fun BooleanArray.lastOrNull(): Boolean?
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fun CharArray.lastOrNull(): Char?
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@ExperimentalUnsignedTypes fun UIntArray.lastOrNull(): UInt?
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@ExperimentalUnsignedTypes fun ULongArray.lastOrNull(): ULong?
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@ExperimentalUnsignedTypes fun UByteArray.lastOrNull(): UByte?
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@ExperimentalUnsignedTypes fun UShortArray.lastOrNull(): UShort?
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Returns the last element, or null if the array is empty.

import kotlin.test.*

fun main(args: Array<String>) {
//sampleStart
val list = listOf(1, 2, 3, 4)
println(list.last()) // 4
println(list.last { it % 2 == 1 }) // 3
println(list.lastOrNull { it < 0 }) // null
// list.last { it < 0 } //  will fail

val emptyList = emptyList<Int>()
println(emptyList.lastOrNull()) // null
// emptyList.last() //  will fail
//sampleEnd
}
Common
JVM
JS
Native
1.0
inline fun <T> Array<out T>.lastOrNull(
    predicate: (T) -> Boolean
): T?

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inline fun ByteArray.lastOrNull(
    predicate: (Byte) -> Boolean
): Byte?

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inline fun ShortArray.lastOrNull(
    predicate: (Short) -> Boolean
): Short?

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inline fun IntArray.lastOrNull(
    predicate: (Int) -> Boolean
): Int?

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inline fun LongArray.lastOrNull(
    predicate: (Long) -> Boolean
): Long?

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inline fun FloatArray.lastOrNull(
    predicate: (Float) -> Boolean
): Float?

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inline fun DoubleArray.lastOrNull(
    predicate: (Double) -> Boolean
): Double?

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inline fun BooleanArray.lastOrNull(
    predicate: (Boolean) -> Boolean
): Boolean?

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inline fun CharArray.lastOrNull(
    predicate: (Char) -> Boolean
): Char?

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inline fun <T> Iterable<T>.lastOrNull(
    predicate: (T) -> Boolean
): T?

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inline fun <T> List<T>.lastOrNull(
    predicate: (T) -> Boolean
): T?

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@ExperimentalUnsignedTypes inline fun UIntArray.lastOrNull(
    predicate: (UInt) -> Boolean
): UInt?

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@ExperimentalUnsignedTypes inline fun ULongArray.lastOrNull(
    predicate: (ULong) -> Boolean
): ULong?

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@ExperimentalUnsignedTypes inline fun UByteArray.lastOrNull(
    predicate: (UByte) -> Boolean
): UByte?

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@ExperimentalUnsignedTypes inline fun UShortArray.lastOrNull(
    predicate: (UShort) -> Boolean
): UShort?

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Returns the last element matching the given predicate, or null if no such element was found.

import kotlin.test.*

fun main(args: Array<String>) {
//sampleStart
val list = listOf(1, 2, 3, 4)
println(list.last()) // 4
println(list.last { it % 2 == 1 }) // 3
println(list.lastOrNull { it < 0 }) // null
// list.last { it < 0 } //  will fail

val emptyList = emptyList<Int>()
println(emptyList.lastOrNull()) // null
// emptyList.last() //  will fail
//sampleEnd
}
Common
JVM
JS
Native
1.0
fun <T> Iterable<T>.lastOrNull(): T?
(source)

Returns the last element, or null if the collection is empty.

import kotlin.test.*

fun main(args: Array<String>) {
//sampleStart
val list = listOf(1, 2, 3, 4)
println(list.last()) // 4
println(list.last { it % 2 == 1 }) // 3
println(list.lastOrNull { it < 0 }) // null
// list.last { it < 0 } //  will fail

val emptyList = emptyList<Int>()
println(emptyList.lastOrNull()) // null
// emptyList.last() //  will fail
//sampleEnd
}
Common
JVM
JS
Native
1.0
fun <T> List<T>.lastOrNull(): T?
(source)

Returns the last element, or null if the list is empty.

import kotlin.test.*

fun main(args: Array<String>) {
//sampleStart
val list = listOf(1, 2, 3, 4)
println(list.last()) // 4
println(list.last { it % 2 == 1 }) // 3
println(list.lastOrNull { it < 0 }) // null
// list.last { it < 0 } //  will fail

val emptyList = emptyList<Int>()
println(emptyList.lastOrNull()) // null
// emptyList.last() //  will fail
//sampleEnd
}