getOrElse. Returns the encapsulated value if this instance represents success or the result of onFailure function for the encapsulated Throwable exception if it is failure. Note, that this function rethrows any Throwable exception thrown by onFailure function.

getOrElse( index: Int, defaultValue: (Int) -> T ): T. inline fun ByteArray.getOrElse( index: Int, defaultValue: (Int) -> Byte ): Byte. inline fun ShortArray.getOrElse(

fun main () { //sampleStart val list = listOf (0, 10, 20) println (list.getOrElse (1) { 42 }) // 1 println (list.getOrElse (10) { 42 }) // 2 //sampleEnd } xxxxxxxxxx. We want to return a certain view depending // on the result authenticate(username, password).map { views.html.index(it) }.getOrElse { views.html.login("Invalid username or password") } This is a somewhat contrived example from the Play! 2 scala framework (written as a kotlin statement) 2021-02-08 · Kotlin also allows the use of bracket notation as a shorthand for the get method: val map = mapOf("Vanilla" to 24) assertEquals(24, map.get("Vanilla")) assertEquals(24, map["Vanilla"]) There are some getter methods that define a default action in case a key doesn’t exist in the map. 2021-02-09 · Fortunately, Kotlin has a handy, exception-safe method: fun parseInput(s : String) : Option = Option.fromNullable(s.toIntOrNull()) We wrap the parse result into an Option.

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Prints 42 because the index 10 is out of bounds. getOrElse can also be applied to Map to get the value for the given key. This function is a shorthand for getOrElse { throw it } (see getOrElse). Contributing to Kotlin Releases Press Kit Security Blog Issue Tracker Kotlin™ is protected under the Kotlin Foundation and licensed under the Apache 2 license. I don't undertand how to specify the default value for `ByteArray.getOrElse() function. I tried: myInt = dat.getOrElse(0, 0).toInt() but compiler complains with the following error: The integer getOrElse 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.

The Kotlin Programming Language. Contribute to JetBrains/kotlin development by creating an account on GitHub.

IntelliJ IDEA List is an ordered collection and can contain duplicate elements. You can access any element from its index. The List is more like an array with dynamic length, List is one of the most used Collection type.

kotlin-stdlib/kotlin.collections/getOrElse Platform and version requirements:JVM (1.0), JS (1.0), Native (1.0) Returns an element at the givenindexor the result of

Code. Let’s imagine Map holding some preferences.

The Kotlin Programming Language. Contribute to JetBrains/kotlin development by creating an account on GitHub.
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133 Reference 63 Tutorials 751 kotlin 31 kotlin.annotation 5 kotlin.browser 656 kotlin.collections 17 kotlin.comparisons 15 kotlin.concurrent 20 kotlin.contracts 45 kotlin.coroutines 4 kotlin.coroutines.cancellation 6 kotlin.coroutines.intrinsics 10 kotlin.dom 7 kotlin.experimental 97 kotlin.io 144 kotlin.js 47 kotlin.jvm 43 kotlin.math 120 kotlin.native 114 kotlin.native.concurrent 6 kotlin Kotlin tutorials. The https://play.kotlinlang.org website includes rich tutorials called Kotlin Koans, a web-based interpreter, and a complete set of reference documentation with examples.

If you’re familiar with Kotlin’s approach to null-safety, feel free to skip this section with no regrets.
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getDirectory() · getFile() · getFormatData() · getMetadata() · getOrElse() · getParent() syncWithList() · toCamelCase() · toHexString() · toKotlinObj() · toPlainObj().

The https://play.kotlinlang.org website includes rich tutorials called Kotlin Koans, a web-based interpreter, and a complete set of reference documentation with examples. Udacity course. To view the Udacity course on this topic, see Kotlin Bootcamp for Programmers. IntelliJ IDEA List is an ordered collection and can contain duplicate elements. You can access any element from its index. The List is more like an array with dynamic length, List is one of the most used Collection type. [kotlin] val nextPage = 1 + pageIndexes.getOrElse(dataSource) { 0 } [/kotlin] Thanks to this, we save the condition that checks it.

@Override public int hashCode () {return 1;}; konverteras på Kotlin stackoverflow.com/a/61795721/6352712 getOrElse(i) { 0 }) if (compare != 0) return compare

getOrNull() returns null as the default value. fun main() { //sampleStart val numbers = listOf(1, 2, 3, 4) println(numbers.get(0)) println(numbers[0]) //numbers.get(5) // exception! kotlin-stdlib/kotlin.collections/getOrElse Platform and version requirements:JVM (1.0), JS (1.0), Native (1.0) Returns an element at the givenindexor the result of getOrElse provides safe access to elements of a collection.

Maps in Kotlin have implemented + operator, so we can add a new item just doing map = map + Pair, which is the same as map += Pair. Kotlin vs Scala. GitHub Gist: instantly share code, notes, and snippets. A recent question on Kotlin’s Reddit came to my attention lately: 'Why is it bad to write extension functions for classes that you own?' One of the answer was that it was the opposite: it’s a good practice, and for several reasons. Among them were two very important ones that improve the design of one’s code: Able to call the function on a nullable.