kotlin-stdlib/kotlin.collections/findLast

findLast

inline fun <T> Array<out T>.findLast(predicate: (T) -> Boolean): T?

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

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

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

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

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

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

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

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

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

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

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

Samples

import samples.*
import kotlin.test.*
fun main() { 
   //sampleStart 
   val numbers = listOf(1, 2, 3, 4, 5, 6, 7)
val firstOdd = numbers.find { it % 2 != 0 }
val lastEven = numbers.findLast { it % 2 == 0 }

assertPrints(firstOdd, "1")
assertPrints(lastEven, "6") 
   //sampleEnd
}

@ExperimentalUnsignedTypes

inline fun UIntArray.findLast(predicate: (UInt) -> Boolean): UInt?

@ExperimentalUnsignedTypes

inline fun ULongArray.findLast(predicate: (ULong) -> Boolean): ULong?

@ExperimentalUnsignedTypes

inline fun UByteArray.findLast(predicate: (UByte) -> Boolean): UByte?

@ExperimentalUnsignedTypes

inline fun UShortArray.findLast(predicate: (UShort) -> Boolean): UShort?

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

Since Kotlin

1.3

Samples

import samples.*
import kotlin.test.*
fun main() { 
   //sampleStart 
   val numbers = listOf(1, 2, 3, 4, 5, 6, 7)
val firstOdd = numbers.find { it % 2 != 0 }
val lastEven = numbers.findLast { it % 2 == 0 }

assertPrints(firstOdd, "1")
assertPrints(lastEven, "6") 
   //sampleEnd
}