kotlin-stdlib/kotlin.collections/getOrElse

getOrElse

inline fun <T> Array<out T>.getOrElse(index: Int, defaultValue: (Int) -> T): T
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inline fun ByteArray.getOrElse(index: Int, defaultValue: (Int) -> Byte): Byte
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inline fun ShortArray.getOrElse(index: Int, defaultValue: (Int) -> Short): Short
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inline fun IntArray.getOrElse(index: Int, defaultValue: (Int) -> Int): Int
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inline fun LongArray.getOrElse(index: Int, defaultValue: (Int) -> Long): Long
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inline fun FloatArray.getOrElse(index: Int, defaultValue: (Int) -> Float): Float
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inline fun DoubleArray.getOrElse(index: Int, defaultValue: (Int) -> Double): Double
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inline fun BooleanArray.getOrElse(index: Int, defaultValue: (Int) -> Boolean): Boolean
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inline fun CharArray.getOrElse(index: Int, defaultValue: (Int) -> Char): Char
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Returns an element at the given index or the result of calling the defaultValue function if the index is out of bounds of this array.


inline fun <T> List<T>.getOrElse(index: Int, defaultValue: (Int) -> T): T
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Returns an element at the given index or the result of calling the defaultValue function if the index is out of bounds of this list.


@ExperimentalUnsignedTypes
inline fun UIntArray.getOrElse(index: Int, defaultValue: (Int) -> UInt): UInt
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@ExperimentalUnsignedTypes
inline fun ULongArray.getOrElse(index: Int, defaultValue: (Int) -> ULong): ULong
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@ExperimentalUnsignedTypes
inline fun UByteArray.getOrElse(index: Int, defaultValue: (Int) -> UByte): UByte
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@ExperimentalUnsignedTypes
inline fun UShortArray.getOrElse(index: Int, defaultValue: (Int) -> UShort): UShort
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Returns an element at the given index or the result of calling the defaultValue function if the index is out of bounds of this array.

Since Kotlin

1.3

inline fun <K, V> Map<K, V>.getOrElse(key: K, defaultValue: () -> V): V
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Returns the value for the given key, or the result of the defaultValue function if there was no entry for the given key.

Samples

import samples.*
import kotlin.test.*
import java.util.*
fun main() { 
   //sampleStart 
   val map = mutableMapOf<String, Int?>()
assertPrints(map.getOrElse("x") { 1 }, "1")

map["x"] = 3
assertPrints(map.getOrElse("x") { 1 }, "3")

map["x"] = null
assertPrints(map.getOrElse("x") { 1 }, "1") 
   //sampleEnd
}