A new version 203-1.4.31-release-IJ7148.5 of the Kotlin plugin is available.

Couldn't find any release notes on Kotlin 1.4.31 (searched on Google and checked here), am I missing somehing?

Has someone ever faced this?

Would someone be able to explain this code line by line (for the first two lines, the findAll line and the return lines) for me?

private const val WORD_PATTERN = """[A-Za-z][A-Za-z']*"""
private val WORD_REGEX = Regex(WORD_PATTERN)

fun top3(s: String): List<String> {
    val words = WORD_REGEX.findAll(s).map{ it.groupValues[0].toLowerCase() }
    val occurrences = mutableMapOf<String, Int>()
    for (word in words) {
        occurrences[word] = (occurrences[word] ?: 0) + 1
    }
    return occurrences.toList()
        .sortedByDescending{ it.second }
        .map{ it.first }
        .take(3)
}

Because of this: https://jfrog.com/blog/into-the-sunset-bintray-jcenter-gocenter-and-chartcenter/ any ideas, when kotlinx-collections-immutable-jvm and otheres are available on mavenCentral?

Is there a neat trick to have both reified and inferred type parameters on the same function? It seems the moment I have to provide one I have to provide all, which is making me sad.

Hi! Is anyone else also experiencing problems in the IntelliJ with sealed classes and the

when() { is .. }`

I have a when and i am covering all sub-classes of a sealed class, still the IDE shows me an error. The compiler is fine with the code? I have the newest plugin 1.4.31 and the kotlin version of the project is 1.4.31 as well. Gradle 6.8.1 ... any thoughts?

If I understand correctly: • Kotlin/JVM is best for “I want to be as fast as possible (at the cost of RAM and startup time)” • Kotlin+GraalVM is best for “I don't want to wait for the VM to start (at the cost of throughput)” • Kotlin/Native is best for “I want to use as little RAM as possible (at the cost of speed)” Is that correct?

Apparently I'm a Kotlin nab. How do I get something like this working? I'm looking for a way to combine two interfaces that are from external libs.

How to tell kotlinx-benchmark to run only single benchark, not everything?

https://twitter.com/kotlin/status/1365713318132989954 💡Have you ever used Kotlin in a coding interview? In this presentation, ICPC Gold Medalist Mikhail Dvorkin demonstrates how to solve a sample coding interview problem in Kotlin. Watch the video and share your job interview experience in the comments! ⬇️ https://t.co/6JFcO3XrWy Twitter

help please. I can't use android studio canary 8 arctic fox in macbook big sur

General question, when will android studio, java will be optimized for apple silicon? Currently it is usable but not compared to native applications like xcode

I have this weird fear of failing.

I like how Kotlin removes the need for semicolons. There is absolutely little-to-no point in having semicolons in coding languages these days. When I used to code in C# (and later in Java) I never understood the point of having to press the semicolon with my pinkie finger after each statement. Who else agrees with this?

Hey folk's, I'm new to Kotlin. Previous I have developed Apps using Java. Not its time to start Kotlin. Any suggestions

Hi! there is a definite need for my startup to do Mobile based app What criteria should i consider apart from performance,build fast and nice gui to choose one language over other like kotlin over traditional platform (android/ios)

Hi guys, I am looking for an elegant way of accomplishing the following: I have a sorted list of objects ranging from 0 to 43000 (number of items in list) I would like to get a list of lists where each list contains 5% of the list. [[top 5% of items], [next 5% of items]…] We should have 20 smaller lists now, I wanted to just have empty lists at the end if we run out of items. So far I have tried the chunked function

val myList = (1..100).toList().chunked(5) -> gives me the right answer

val result = (1..45).toList().chunked(5)) -> gives me only 9 chunks

Is it possible to add empty lists for the remaining 11 chunks?

Hey, I was messing around with covariance and contravariance and did not expect this to work. It looks like I created a function which is bivariant. How is that possible as the following code compiles and runs.

class Container<in T>(private val t: T) 

open class Noun
open class City: Noun()
class Capital: City()

fun goCity(container: Container<City>) {
    println(container)
}

fun main() {
    goCity(Container(Noun())) // pass in a super type of City, this is what I would expect as it is defined contravariance
    goCity(Container(Capital())) // pass in a sub type of City, would not have expected this as it is defined contravariance
}

hello, I'm fairly new to Kotlin and I'm working on a Kotlin project that uses Gradle. When running a simple Kotlin Unit test, Intellij Idea runs the gradle

test

task rather then executing the test directly (like in a Java project). Is there a way to run the test directly in Intellij?

Following up on a previous question (https://kotlinlang.slack.com/archives/C0922A726/p1614689220294100) , every time I execute a Kotlin test in Intellij Idea, with or without code modifications, the IDE seems to rebuild the project the test lives in. The rebuild process takes over 30 seconds, even if the project is quite small (2.6GHZ MacBook pro, 32Gb ram). Any idea how to speed up the process?

Hello! I am fairly new to kotlin. Does anyone know how should I write the query when the response is the List in this case? i would appreciate if someone can help with that!

What is a lambda expression? I am confused what this is:

I'm not understanding inline classes... What do they do? I only have a small amount of knowledge of the JVM and stack/heap stuff. etc. I am trying to improve my knowledge in that sector of things.

We could just use a data class with one property

Hi People, I am struggling with a client who wants only people with Kotlin/JVM experience cause that is what they use (it makes sense for the ask) but my struggle is that Kotlin people are hard to find and I’ve stated that getting other language developers and skilling up is viable. I believe the skilling up from other languages like C# or JS to Kotlin is not difficult and there is overlap of skills (especially for C#). Would love to know if you agree or disagree with me and what your experience coming from other languages to Kotlin?

is it possible to create a sub enum class from an enum class?

since StringBuilder is an

expect class

, how would one go about adding functionality to it? say I was a kotlin dev and wanted to add a new function, where would the actual implementation be? or if i wanted to modify the signature of an existing function by adding a new argument with a default value

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Kotlin Multiplatform Mobile question... I have the following:

inline fun <reified T : Any> jsonToConfig(stringJson: String): T? =
    Json.decodeFromString<T?>(stringJson)

Using Kotlinx Serialization decoding from the string works fine in Kotlin. But in Swift: let projectConfig: ProjectConfig? = config.jsonToConfig<ProjectConfig>(stringJson: jsonString) I get the following error: "Cannot explicitly specialize a generic function". Any ideas how I could go about getting this to work?