I am getting "There are multiple versions of "kotlin-test" used in nodejs build: 1.3.72, 1.4.20-M2. Only latest version will be used." despite there's nowhere "1.3.72" in my sources. Any idea why?

Is

contract

in this function correct?

Hi all. I have a strange one here and just hoping someone can point me in some direction. I am trying to publish a Kotlin multi-platform project to a Nexus server. I have the releases repository deployment policy set to "Disable redeploy". For some reason, when using the maven-publish in Gradle, it appears to be doing an update somewhere causing this error: "Received status code 400 from server: Repository does not allow updating assets: maven-releases". I can change the deployment policy to allow "Allow redeploy", which fixes the issue, but that isn't the desired behavior. Any ideas?

Is there any idiomatic way to replace strings which can contains parameters? For instance my string is :

ANIMAL:TYPE:{variable1};NAME:{variable2};AGE:{variable3};FAMILY:{variable4};

Note, perhaps

variable4

is null/empty and I have anything there, I mean I should be able to replace with "" if it's not present

Hello folks. I'd like to know if there's a way of passing a Named parameter as an argument. For exemple: fun abc(namedArgument: String, value: Int) { abcd(namedArgument = value) } Thanks in advance 👍

This message was deleted.

Is it possible for a 3rd party library to disable logging in my main program?

If I want to create a duplicate of an existing (nested) dataclass, but with one single val changeb, I had an idea that Kotlin provides syntax to express this concisely but now I cant for the life of me find a reference to to

it there an idiomatic way to copy a structure, but changing a single field

If I need to pass the current JVM class to a static method but I don't really have a class, is this the only way to do it? See image.

How would I go about running a simple kotlin script? I want to try out a library and I don't feel like creating a separate project for it, I've found that you could just add

@file:DependsOn("...")

annotation on it and it should work, I'm getting an error that "DependsOn" doesn't exist

stupid question here. I want to ditch the spread operator, but can't find a idomatic solution:

arrayOf(
            Libraries.APPCOMPAT,
            *Libraries.KotlinExt.getAll(),
            Libraries.TIMBER
    ).forEach { // do sth. }

getAll()

returns an array but could als be another type of collection, I'm flexible here. What would be an idomatic solution?

hello all; I’ve posted this question in #scripting but I could not get any answers… Does anyone know how to answer ? Thanks in advance ! https://kotlinlang.slack.com/archives/C0BT46EL8/p1603997436049300

⁉️Call for feedback Hey everyone! Who of you folks visit/use Kotlin language specification? Please DM me or leave a comment under this message, I have some questions for you 🙄

TIL that this is totally valid kotlin syntax:

class A class B class C

(i learned that by a copy paste mistake)

Is there an official jetbrains library to get an AST out of a Kotlin file?

Is it true that i should be able to invite others into this server? if yes, how'd i do that? kinda lost in slack's UI, tbh ^^'

can i ask questions related to android here?

Is there a way to prevent upcasting generic types of functions when calling them with different argument types? Say I write the following function as a test util:

/**
 * Asserts that two objects of type [T] are equal.
 */
infix fun <T> T.shouldBe(that: T) {
    Assertions.assertEquals(that, this)
}

So that I can easily write

data.property shouldBe value

, this works great. But when I supply two values of different types

"string" shouldBe 5

, the compiler doesn't complain. It infers the generic type to be

Any

. While valid behaviour, it's not what I want to happen. Is there a way I can tell Kotlin to not upcast the generic type if the argument type is not assignable to the receiver type?

Hi! Spring has a WebClient interface, written in Java That interface has the following method:

contentType(MediaType contentType)

In my Kotlin code I call that method, passing a null Intellij IDEA Ultimate 2020.2 highlights it in red, saying: Null cannot be a value of a non-null type MediaType But there are no special annotations on the interface method Why does this happen, and how do I handle it? (I actually pass a nullable value, and the DefaultWebClient implementation calls a method annotated with @Nullable, so it can work with nulls)

Hello, I have a list with a few thousand entries in it. I need to add an element to the start of the list ... whats the best way to do this? Currently I'm doing this:

val list = listOf(2,3,4)
val el = 1
val next = listOf(el) + list

Thoughts?

is there a special reason why kotlin has the elvis operator for null values but nothing similar for booleans? A lot of times I'm doing sth. like

val foo = doSomething(); 
if (!foo) return;

and

val foo = doSomething() ?? return

would be nice.

Just amazed by all the extension functions, no need to

sequence.flatMap { list.asSequence }

sequence.flatMap { list }

is enough

Hi all! https://stackoverflow.com/questions/4617935/is-there-a-way-to-include-commas-in-csv-columns-without-breaking-the-formatting Who knows a beautiful solution in Kotlin?

Why I can't use

JvmName

for the extension method of

UInt

. It works for

Int

.

Any official doc or release note regarding JetBrains Compose?

Hi, I need some help to understand what's going on with a lambda call to an interface. I have the following interface in Java:

public interface ThreadExecutor {
    void execute(Runnable runnable);
}

Which I can call from Kotlin this way:

threadExecutor.execute { //code }

But, If I convert the interface to Kotlin, then I get an error in those calls, saying that they expect a Runnable but the return is Unit.

interface ThreadExecutor {
    fun execute(runnable: Runnable)
}

And I have to explicitly create the Runnable object.

threadExecutor.execute(Runnable { /* Code */ })

Would be great to understand why it happens, but also any idea on how to better solve it without having to create the Runnable in every call?

Why doesn’t this work?

import Scratch_12.MyUITableViewCell.Companion.register

class UITableView

class MyUITableViewCell {
    companion object {
        fun UITableView.register() {}
    }
}

val tableView = UITableView()
with(tableView) {
    MyUITableViewCell.register()
}

The IDE adds the import but the call to

register

is still red and it says it cannot find it and suggests to import it, which does nothing as it’s already imported (example class names are relevant to the use case).

Is there a class which more directly represents "block until a condition is met" behavior? Or is the idea to just use

CountdownLatch

with a value of 1?

Does anyone know the motivation behind

FloatIterator

?, we already have

Iterator<Float>

https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/-float-iterator/