Hello! I cant good speck and write English but I need Your help. Exist methods for DoubleClick?

what...

object A : Table(name = "a_table") { var b = date("b_column") }

Not helping me 😕

I ran into a situation where I am importing a top-property with a * import, and a type with the same name explicitly. I wanted to invoke a static method from the type, which resolved to a call on the property that I imported. At first I thought this is definitely a bug, but I realized that it is probably a subjective matter. There are two rules at play: * In Kotlin, properties and local variables take precedence over types/companion objects when resolving a function-with-receiver call. * Also, explicit imports take precedence over symbols imported with a

*

import. The reality is that the first rule seems to take priority over the second. I think it should be the other way around. What do you think?

any idea why I am getting this?

override fun <SubsystemStateCondition>getConditionValue(): SubsystemStateCondition {
        return state
    }

interface Condition {
    fun <T> getConditionValue(): T
}

Given a sealed class Foo and an instance of

val someClass: KClass<out Foo>

is it possible for

someClass.objectInstance

to be null? I think the answer is yes but I am struggling to come up with a way to make a test for such a thing. The documentation for objectInstance says, ” …if this class is not an object declaration” so my question really boils down to: how do I define a class that is not an object declaration? And the corollary, can I define a member of a sealed class that is not an object declaration. If you’re inclined to reply, please do so in a thread. Thanks. fwiw, my brain hurts just trying to grok this.

what class are `object`s ?

I'm losing connection to the DB using Jetbrains Exposed... And it's not trying to reconnect by himself. Anyone can help me ?

Is there any way to marshal Kotlin list of pairs as json object with each pair being key, value ?

well, that happens only if the companion got the

private

modifier, ok with nothing(

public

),

internal

or even

protected

Hi all, I've been getting an interesting error when my app runs for an extended period of time:

17:10:33.977 [main] ERROR bees.stream.MessageStream - [MessageStream.kt:42] || - Message deserialization failed.
kotlin.reflect.full.IllegalCallableAccessException: java.lang.IllegalAccessException: class kotlin.reflect.jvm.internal.calls.CallerImpl$Constructor cannot access a member of class bees.stream.MessageStream$SystemMessage with modifiers "public"
        at kotlin.reflect.jvm.internal.KCallableImpl.call(KCallableImpl.kt:224)
        at kotlin.reflect.jvm.internal.KCallableImpl.callDefaultMethod$kotlin_reflect_api(KCallableImpl.kt:152)
        at kotlin.reflect.jvm.internal.KCallableImpl.callBy(KCallableImpl.kt:110)
        at com.squareup.moshi.kotlin.reflect.KotlinJsonAdapter.fromJson(KotlinJsonAdapter.kt:104)
        at com.squareup.moshi.JsonAdapter$2.fromJson(JsonAdapter.java:137)
        at com.squareup.moshi.JsonAdapter.fromJson(JsonAdapter.java:41)
        at bees.stream.MessageStream.onMessages(MessageStream.kt:39)
        at bees.stream.kafka.KafkaConsumerProducerStream.start(KafkaProducerConsumerStream.kt:64)
        at bees.BeesKt.main(bees.kt:65)
Caused by: java.lang.IllegalAccessException: class kotlin.reflect.jvm.internal.calls.CallerImpl$Constructor cannot access a member of class bees.stream.MessageStream$SystemMessage with modifiers "public"
        at java.base/jdk.internal.reflect.Reflection.newIllegalAccessException(Reflection.java:361)
        at java.base/java.lang.reflect.AccessibleObject.checkAccess(AccessibleObject.java:591)
        at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481)
        at kotlin.reflect.jvm.internal.calls.CallerImpl$Constructor.call(CallerImpl.kt:41)
        at kotlin.reflect.jvm.internal.KCallableImpl.call(KCallableImpl.kt:106)
        ... 8 common frames omitted
17:10:33.989 [main] DEBUG bees.stream.MessageStream - [MessageStream.kt:83] || - Completed message processing. Returning 0 responses.

I have a Moshi instance whose job it is to do this deserialization. The class it wants to create is:

private data class SystemMessage(val command: String, val sessionId: UUID, val commandId: UUID, val data: Any)

. This is private to the class within the module. This only happens when the app is running for longer periods, if I restart and try again it works fine. When I search "java cannot access a member of a class with modifiers public", I get results which indicate that the class cannot be instantiated since it's private to its enclosing class. However, this doesn't explain why it works for some time if I restart the app. I've tried with JVM 8 and JVM 11, same error on both. This was built with Kotlin 1.3.10, but I'm going to try 1.3.20 now. Any help would be greatly appreciated 🙂

is there a workaround for https://youtrack.jetbrains.com/issue/KT-28418?

java.lang.IncompatibleClassChangeError: com.github.fluidsonic.fluid.json.ListJSONDecoderCodec and com.github.fluidsonic.fluid.json.ListJSONDecoderCodec$$special$$inlined$create$1 disagree on InnerClasses attribute

is it bad practice to start interfaces with

I

?

did:

org.jetbrains.kotlinx:kotlinx-html-jvm:0.6.10

get removed from the kotlinx repo ?

I;m working through the ray tracer challenge book, which is a test based tutorial on how to code a ray tracer. At the start of the book they define a class known as a Tuple, which models a position or a vector. A simplified version is this class Tuple(val x: Double, val y: Double, val z: Double, val w: Double) There's a lot of overloaded constructors and operator overloads but the basic structure is pretty simple, 4 doubles, x,y,z, and w. In the second chapter they introduce the concept of a Color, which is in essence also a Tuple, with red,green and blue instead of x,y and z. Is there any way I can somehow base Color on Tuple, with RGB mapping to xyz ?I guess I could delegate to a Tuple rather than somehow extend it, but that that sounds a bit clunky.

Have a general question about kotlin plugin for intellij. Does exist some IDE action for navigation to kotlin extension function (or just function)? Currently I use [option+command+O] for navigation to symbol, but search result polluted with java method names (especially for such common names as fold, reduce etc)

Hi All, I want to create extension function (like

run

https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/run.html) which returns nothing (

Unit

) (see code block).

towards

function purpose: run

block()

in scope of

T

. And if

block()

returns some result - it must be ignored. Kotlin-Dev Team, could you please recommend better name? And do you have plans to add same extension to language? Thank you in advance.

Hello, could someone tell me what is the difference between these two ways of synchronization and why would I use one over the other? I noticed it's impossible to call suspending functions inside a synchronized block but it's fine with the other way, why is that?

where can I find information/listing on options like jvm-default?

I have a fairly large multi-project (~ 70 projects) Kotlin and Gradle Kotlin DSL based project. I just updated to Kotlin

1.3.20

and now I'm getting

java.lang.OutOfMemoryError: Metaspace

exceptions from the Koltin compiler. I'm also using the

kotlin.parallel.tasks.in.project=true

flag. Is this a known issue & is there a workaround?

What is the correct way to compare Byte to Int?

if (myByte.compareTo(myInt) == 0)

?

if (myByte.toInt() == myInt)

?

if (myByte == myInt.toByte())

? Something else? Or can I force implicit conversion somehow, as I have a lot of these comparisons?

Anyone out there do code gen? I want to generate kotlin (multiplatform) code from an xml schema and need guidance on project structure.

Does anyone know why updating from kotlin 1.2 to 1.3 would result in springboottests throwing these errors? And how to fix it.

Caused by: java.lang.IllegalStateException: Resource not found in classpath: kotlin/coroutines/coroutines.kotlin_builtins

I believe it may have something to do with the fact that we have a gradle build with a maven parent pom using gradle’s

implementation(platform())

ability.

is there a standard of when to use higher order functions vs interfaces with one method?

I previously had this,

fun Suite.mapsTo(expected: String) {
        val testObject by memoized<Any>()
        it("test value") {
            pp(testObject)
            outContent shouldRenderLike expected
        }
    }

    fun testObject(obj: Any?) {
        val testObject by memoized { obj }
    }
    
    describe("tiny object should") {
        context("render a single field") {
            testObject(TinyObject(1))
            mapsTo(
                """
                TinyObject(
                  int = 1
                )
                """
            )
        }
    }

but I find it very messy, and I can't use an infix....

Is somethink like type safe heterogenous containers even possible with kotlin? http://www.informit.com/articles/article.aspx?p=2861454&seqNum=8

Is there still no Gradle plugin to generate Kotlin code based on (any platform) Kotlin code (similar to java annotation processors), or any kind of plans/KEEP for metaprogramming in Kotlin ? Something like official compiler API to manipulate (or even read only) the AST would be really nice.

how does kotlin generate hashcodes for data classes?