Kotlin 1.4 Features Codersee Kotlin, Ktor, Spring
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Kotlin When Multiple Values? 15 Most Correct Answers
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.
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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
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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
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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
Kotlin When Multiple Values? 15 Most Correct Answers
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.
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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.
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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") } }
Kotlin program to check if an array contains any one of multiple values CodeVsColor
Allow assigning the same value to multiple targets at once. Language Design. oakkitten September 23, 2020, 1:43am 1. It would be nice to have this syntax: a = b = 1. which would be equivalent to. 1.let { a = it b = it } This doesn't require turning assignment into an expression, but could be a special case of several = in a row.
How to return multiple values in Kotlin, with 0 allocation
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 } } }
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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
Android Kotlin when with multiple values not working when value is an android view YouTube
When we want to return multiple things, we put it into a container: a class. However, that approach has 2 caveats: Requires extra allocation. Requires naming the class. If the code is not called at high frequency (many times per second), and not in UI, the first caveat should not be a concern. However, the second caveat means that in addition.
Kotlin Variables and Values Kotlin Android 03 YouTube
You can multiply as many numbers in a single expression as you would like by chaining the Multiplication operator. Examples Multiplication of 4 and 6 In the following program, we take two variables: n1, and n2 with the values 4 and 6 respectively; and find their product. Kotlin Program
[Solved] How to sort based multiple values in 9to5Answer
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 when multiple values
Enum classes in Kotlin have synthetic properties and methods for listing the defined enum constants and getting an enum constant by its name. The signatures of these methods are as follows (assuming the name of the enum class is EnumClass ):
What is Kotlin and How Does Kotlin Work? Programming Cube
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:
