A Free Online Certificate Course On How To Program Using Kotlin, JDK & Android Studio. Recognized And Prize-Winning Courses Provided Online And For Free - Since 2007. There are two things to notice when using when as an expression in Kotlin. First, the value that is returned to the caller is the value of the matching case block or, in other words, the last defined value in the block. The second thing to notice is that we need to guarantee that the caller gets a value.
Kotlin When Multiple Values? 15 Most Correct Answers
4 Answers Sorted by: 123 You're missing the other is: fun applyTemplateViewStyles (view: View) { when (view) { is EditText, is TextView -> { println ("view is either EditText or TextView") } else -> { println ("view is something else") } } } Share Follow edited Jun 2, 2017 at 21:13 answered May 20, 2017 at 13:58 Daniel Storm 18.6k 9 84 152 1. Overview In this tutorial, we're going to learn how to return multiple values from a Kotlin function. In the first two sections, we'll briefly talk about tuples and destructuring declarations in Kotlin. Then we'll use these declarations to return multiple values from a function. 2. No Tuples in Kotlin Kotlin Basics 1. Overview As we've known, we can declare and assign multiple variables in one single line in Java. In this tutorial, we'll explore how to do the same in Kotlin. 2. Introduction to the Problem Like Java, we can declare and assign multiple variables in one line. In this tutorial, we'll addresses approaches to do that: Multiple values can be represented in Kotlin using collections. For example, we can have a simple function that returns a List of three numbers and then print them all using forEach: xxxxxxxxxx fun simple(): List
= listOf(1, 2, 3) fun main() { simple().forEach { value -> println(value) } } Open in Playground → Target: JVM Running on v. 1.9.21
Classes and Objects in Kotlin IoTSewa
Multiple variable let in Kotlin Ask Question Asked 7 years, 10 months ago Modified 3 months ago Viewed 83k times 199 Is there any way to chain multiple lets for multiple nullable variables in kotlin? fun example (first: String?, second: String?) { first?.let { second?.let { // Do something just if both are != null } } } when defines a conditional expression with multiple branches. It is similar to the switch statement in C-like languages. Its simple form looks like this. when (x) { 1 -> print("x == 1") 2 -> print("x == 2") else -> { print("x is neither 1 nor 2") } } The Kotlin standard library provides extension functions for grouping collection elements. The basic function groupBy () takes a lambda function and returns a Map. In this map, each key is the lambda result and the corresponding value is the List of elements on which this result is returned. This article covers different ways to return multiple values from a function in Kotlin. 1. Using Data class The idiomatic way of returning multiple values from a function is to define your data class and return its instance from the function. Then you can unpack values using destructuring declaration inside the caller function. 1 2 3 4 5 6 7 8 9 10 
Kotlin Variables and Values Kotlin Android 03 YouTube
1. Overview In Kotlin, let () is a pretty convenient scope function. It allows us to transform the given variable to a value in another type. In this tutorial, we'll explore how to apply let -like operations on multiple variables. 2. Introduction to the Problem First of all, let's look at a simple let example: How to assign same value to multiple variables in Kotlin. 1. How to create variables in a for-loop with Kotlin. 0. dynamically create kotlin variable. 1. how to set multiple kotlin variables in one line. 1. How to multiply variables in a string literal in Kotlin? 2. kotlin and declaring variables correctly. 0.
Kotlin has many different utilities and helper functions for sorting collections. These utilities are also equipped for dealing with multiple fields at once. Significantly, they come into play when we can't add the interface to the target class or we want a variety of sorting options. 3.1. Use sortedWith and compareBy How to return multiple values from a function in Kotlin like we do in Swift? 3. Kotlin Generics and nullable Class type. 0. How to convert nullable MutableMap to not nullable in Kotlin? 337. Kotlin: how to pass a function as parameter to another? 3. Kotlin nullable generic. Hot Network Questions 
How to return multiple values in Kotlin, with 0 allocation
Mar 7. When dealing with multiple values in Kotlin, there are several options available. In this post will look at List, Sequence, and Flow. In order to have a better understanding of these 3 options and how they differ we will define a hypothetical problem and try to refine our solution until we reach the desired outcome. We could approach this problem by writing two different functions: Kotlin fun positiveRoot (k: Int): Double { require (k >= 0) return Math.sqrt (k.toDouble ()) } fun negativeRoot (k: Int): Double { require (k >= 0) return -Math.sqrt (k.toDouble ()) } Another approach might be to return an array so we only have to invoke one function: Kotlin
