is there an UI project which supports hot reload (similar to react native or flutter)?

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Hi! I have a project with multiplatform gradle module and jvm application module. Now I want to create one more which would be used in the both ones. I am also making this new module multiplafrom and impotr it in the both gradle modules. In compilation time everything is fine but in runtime jvm module errors with java.lang.NoClassDefFoundError https://github.com/BulatMukhutdinov/Challenger Does anyone faced this issue?

Just a plug from a random dev - tried the NativeScript Kotlin support last night - within 30 min, with an Mac and iPhone, I was seeing my Kotlin app on a iPhone - pretty sweet.

Hi everyone! I am trying to open a Maven Kotlin project on Eclipse, which contains .kt and .kts files. I have no problem with .kt files but when I tried to load a .kts file into the editor, Eclipse isn't able to open it. If you notice on the screenshot, there are 2 tabs: one for a .kt file and the other tab only has the close icon on the tab (this is the .kts file I'm trying to load on Eclipse). I tried different versions of Eclipse but still no luck. Does anybody have the same issue? Any help is appreciated! I get that IntelliJ has awesome support for Kotlin. But this is for a project I'm working on at my company. Some people are just afraid for changes :) Thanks! Ardian

Hi all. For you Sqlite experts out there, is there an obvious, more concise representation of this:

(SELECT count(*) FROM songs WHERE songs.albumId == albums.id AND songs.blacklisted == 0) as songCount

What I’ve got is fine. I’m just wondering if I could be taking advantage of the

count(distinct songs.id)

(or whatever) syntax

Hey there. I'm trying to use a method with the following signature

inline fun <T> withLoggingContext(map: Map<String, String>, body: () -> T): T {

invoking it like this

withLoggingContext(browserInfo.toMap()) {
                logger.warn { "Payment context provides no customer ip address" }
            }

leads to following compilation error

Error:(28, 13) Kotlin: None of the following functions can be called with the arguments supplied: 
public inline fun <T> withLoggingContext(vararg pair: Pair<String, String>, body: () -> ???): ??? defined in mu
public inline fun <T> withLoggingContext(pair: Pair<String, String>, body: () -> ???): ??? defined in mu
public inline fun <T> withLoggingContext(map: Map<String, String>, body: () -> ???): ??? defined in mu

Help is appreciated

is there a better way to do early exit from a function that this?

val foo: Foo = optionalFoo ?: run {
    log.e("Not set, can't continue!")
    return
}

Hello everyone. I'm using DateTime - joda, and the postgresql database. When I send a date, it always records with one less day. Does anyone know why?

anyone taking this contest 😛 https://codeforces.com/blog/entry/75327

I’m unable to retrieve a value from a

MutableHashMap

, using the keys retrieved from the map itself. Does anyone know how that could be possible? Attached is a screenshot of the seemingly contradictory debugger outputs. I should note, this isn’t just an issue with the debugger. In practice I’m inserting a key into a map, then almost immediately retrieving (further up the same call stack) using the exact same key and getting back

null

for the value corresponding to that key. There’s no multi-threaded access to this map etc.

hashCode

and

equals

are stable for said key. This is using Jetbrain’s runtime.

Hey everyone 👋 I am trying to write a "circular" iterator that works like so:

val it = (1..3).circularIterator()
it.next() // 1
it.next() // 2
it.next() // 3
it.next() // 1
// and so on...

Any ideas how I can accomplish this? Is there already something similar in the stdlib?

can i somehow override setters of `var`s in a data class so i can sanity-check the data coming in ?

I don't know why I thought this was possible:

data class Something(val somethingElse: SomethingElse, val andAnotherOne: AndAnotherOne)

val something = Something(SomethingElse(), somethingElse.anotherOne)

is there any reason why not (I mean being able to access the first val when initializing the second)? Why shouldn't this be like a regular `val`s inside the class?

Hello. I’m porting RxPm library to Multiplatform based on Reaktive. Now I made Android part and trying to implement iOS, but I got strange behaviour: if I’m not using class or interface from rpm module in app-common such classes doesn’t includes to iOS framework. Maybe someone has such problem and can help me. Latest code available here https://github.com/vchernyshov/reaktive-pm/tree/reaktive-pm-mpp

Is there a Kotlin library to access and interact with Unix terminals?

Hello, I was wandering how to make Kotlin Enum class serializable the good Way. I see some people using kotlinx.serializable with annotation @Serializable, somme others could use implementation avec the enum class like

enum class Content(val value: String) : Serializable {

In java, Enum is serializable by design but not in Kotlin. How would you do it ?

I just received a reminder email that there is 48hours left to submit a talk for KotlinConf. Should we still draft a submission or will there be a separate call for submissions later in the future?

Hey guys, just a general question.... Am I allowed to store a chat between user A and B for administrators so that they can review everything? Do you see any problems with this?

Hey guys, I found this: https://github.com/Kotlin/kotlinx.collections.immutable. Does a PersistentList have the same performance as a MutableList? For example, I'm now using a MutableList for accumulating all the chat messages in a conversation inside a flow, thinking about going a more immutable way but scared of the performance hit since chat message lists can get big. Will a PersistentList have the same performance as a MutableList in these cases?

Hey folks! The Kotlin User Group #berlin goes virtual - join our experiment with having a virtual meetup: https://www.meetup.com/kotlin-berlin/events/269715296/

How could I refactor this code so squaring stops once the first square greater than 10 is found?

println((1..100000).map { it * it }.filter { it > 10 }.first())

(My real code doesn’t involve numbers or squaring, just a calculation that I want to stop computing when I get an acceptable result from

map

.)

Instead of KAPT and Compiler Plugins. Are there any way to write a codegen easily?

We have tons of enums which encode a mapping from a numeric value (stored in a DB) to a name. I read about "enum with value" and I have some nice compact code like

enum class Type(val value: Int) {
    INVALID(-1), SIMPLE(1), COMPLEX(2);
    companion object {
        private val map = values().associateBy(Type::value)
        fun fromInt(value: Int) = map.getOrDefault(value, INVALID)
        fun fromString(value: String) = try { valueOf(value) } catch (e: IllegalArgumentException) { INVALID }
    }
}

Is there a way to avoid repeating the "companion" part in every enum? Ideally, I would want

enum class Type(code: Int) : Magic(code) { INVALID(-1), SIMPLE(1), COMPLEX(2); }

with also some way to identify the INVALID obejct (or just assume it is always the value associated to

-1

)

Does anybody's gradle glitches like this?

Kotlin's

val

means

immutable

or `readonly`？🤔

The value will be evaluation at runtime, but it's immutable.

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