I want to run kotlin script from a maven build. Does anybody know which args to pass to kotlin-maven-plugin? I tried

mvn kotlin:script -DscriptFile=MyScript.kts

without success

Hello, I have a problem with logging in to https://discuss.kotlinlang.org. It gives me error "Sorry, there was an error authorizing your account. Perhaps you did not approve authorization?" Tried in several browsers, and with cookie clearing. Who can help with this?

[Job Opportunity] Hi All, Ps. My Not sure if correct place to post, but am looking for a Australian / Brisbane based dev to help finish an app for one of our startups. Please PM me if interested. Many thanks 🙂

is any1 having this problem in builds with kotlin latest v:

e: [kapt] An exception occurred: java.lang.NoClassDefFoundError: org/jetbrains/kotlin/serialization/jvm/JvmProtoBufUtil
	at me.eugeniomarletti.kotlin.metadata.KotlinClassMetadata$data$2.invoke(KotlinMetadata.kt:51)
	at me.eugeniomarletti.kotlin.metadata.KotlinClassMetadata$data$2.invoke(KotlinMetadata.kt:50)
	at kotlin.SynchronizedLazyImpl.getValue(Lazy.kt:131)
	at me.eugeniomarletti.kotlin.metadata.KotlinClassMetadata.getData(KotlinMetadata.kt)
	at android.arch.persistence.room.ext.KotlinMetadataProcessor$DefaultImpls.getParameterNames(KotlinMetadataProcessor.kt:33)
	at android.arch.persistence.room.processor.PojoProcessor.getParameterNames(PojoProcessor.kt:74)
	at android.arch.persistence.room.processor.PojoProcessor.getParamNames(PojoProcessor.kt:246)
	at android.arch.persistence.room.processor.PojoProcessor.chooseConstructor(PojoProcessor.kt:264)
	at android.arch.persistence.room.processor.PojoProcessor.doProcess(PojoProcessor.kt:208)
	at android.arch.persistence.room.processor.PojoProcessor.access$doProcess(PojoProcessor.kt:74)
	at android.arch.persistence.room.processor.PojoProcessor$process$1.invoke(PojoProcessor.kt:105)
	at android.arch.persistence.room.processor.PojoProcessor$process$1.invoke(PojoProcessor.kt:74)
	at android.arch.persistence.room.processor.cache.Cache$Bucket.get(Cache.kt:46)
	at android.arch.persistence.room.processor.PojoProcessor.process(PojoProcessor.kt:102)
	at android.arch.persistence.room.processor.EntityProcessor.doProcess(EntityProcessor.kt:68)
	at android.arch.persistence.room.processor.EntityProcessor.access$doProcess(EntityProcessor.kt:50)
	at android.arch.persistence.room.processor.EntityProcessor$process$1.invoke(EntityProcessor.kt:57)
	at android.arch.persistence.room.processor.EntityProcessor$process$1.invoke(EntityProcessor.kt:50)
	at android.arch.persistence.room.processor.cache.Cache$Bucket.get(Cache.kt:46)
	at android.arch.persistence.room.processor.EntityProcessor.process(EntityProcessor.kt:56)
	at android.arch.persistence.room.processor.DatabaseProcessor.processEntities(DatabaseProcessor.kt:248)
	at android.arch.persistence.room.processor.DatabaseProcessor.doProcess(DatabaseProcessor.kt:63)
	at android.arch.persistence.room.processor.DatabaseProcessor.process(DatabaseProcessor.kt:53)
	at android.arch.persistence.room.RoomProcessor$DatabaseProcessingStep.process(RoomProcessor.kt:57)
	at com.google.auto.common.BasicAnnotationProcessor.process(BasicAnnotationProcessor.java:318)

is there a way to create a

Delegates.observable

of a read-only property? e.g.

data class Foo(bar:Boolean, car:Boolean)
val foo by Delegates.observable(Foo(false,false)){...}
foo.bar = true

I'm trying use Koltin Poet to generate data classes for JPA. I'm stuck at trying to create a

val owners: MutableSet<MyObject> = mutableSetOf()

because

MutableSet::class

is

class kotlin.collections.Set

and not

class kotlin.collections.MutableSet

. Any idea why that is the case (or even better what I can do to fix this)?

@Ruckus as for original vector example, I wonder why do you have

var

everywhere, if you always create a copy? If you had

val

properties, you could make

ident

and

zero

just properties and never create these classes again and again

Hi All, I am looking for a Dev to add some extra features to an existing Kotlin (Android) app. Work can be remote, but attending occasional meetings in Brisbane (Australia) would ideal. Please PM me if interested. Posted in #hiring

Logging in to https://discuss.kotlinlang.org still does not work. Does anyone know the administrator contact? I'm not sure this problem affects all users, and may be they are not aware of it.

This is the kotlinglang workspace. Is there a similar Slack workspace more focused on Android? For those not programming in kotlin yet for example.

I tried to check in https://kotlinlang.org/docs/reference/coding-conventions.html, but this case is not mentioned.

I would like to get a behavior like if it was legal to write

fun foo(p:String?):Bar? { .. }
fun foo(p:String):Bar { .. }

Is there an annotation or something to achieve this ?

I have an

ArrayList<Int>

, is there any stlib to get rid of duplicated elements?

Well to garantee non null return if the parameter is not null.

Hi guys, do you have any open sources that is needing contributors? if so, inbox me.

It seems that, if an API isn't annotated `@Nullable`/`@NotNull`, Kotlin assumes that it's

@NotNull

. Is this really the default? Is there a compiler option to fix this?

Correct, but it doesn't mean that Kotlin concider this type as non nullable, it allows you to decide

I got a question about

@Deprecated

and

ReplaceWith()

, while replacing normal functions works fine, replacing infix function will be like this

@Deprecated(..., replaceWith = ReplaceWith("bar(x)"))
infix fun Foo.foo(x: Int) = ...
infix fun Foo.bar(x: Int) = ...

foo foo 10
// After replacement becomes
foo.bar(10)

is there anyway for the IDE do the replacement such that it becomes

foo bar 10

?

Hello Kotlin experts, I am trying to obtain the result from a

flatMap -> comparator

. please see the gist at https://gist.github.com/visakha/8ac7f823e02192beb23a3f869fc4a196

I think

List.asSequence()

might be what you’re looking for - I think using a sequence should only evaluate lazily

of course, you could just do this with a regular ol’ for loop if parsing is that expensive

i just need the latest for each key

well, that one is solved. for whatever reason the request var needed a

toString

even though it was a string.

ok, I'll just use moshi then, thanks

Anybody knows how to write a

@Deprecated(..., ReplaceWith("OtherClass(arg1, arg2"))

which takes the type parameter of the deprecated class into account? Currently it adds it oddly to the replace with transformation, it results in

OtherClass<T>

even though I have not specified

<T>

in the

ReplaceWith

Hello guys! Is there a way to get a companion objects parent class from within a companion declaration?

just want to print, but with a warning next to it to not use print

By doing that you're making those people loose time tracking why there is no output. Just add stylecheck/linting and prevent them from compiling/building code with print/println in it. This is what we have set up in our project, checkstyle detects and complains about print/println and IntelliJ highlights them also.

Why it does not allow to assign descendant class ?

interface TopicDelegate<T: ProfileItem> {
    val title: Int
}

class DistrictDelegate(val api: INetworkApi): TopicDelegate<District> {
    override val title: Int = R.string.choose_districts
}

abstract class TopicFragment<T: ProfileItem> : BaseFragment() {
    private var modeDelegate: TopicDelegate<T> = DistrictDelegate(mNetworkApi) //does not work
    //Type mismatch. Required: TopicDelegate<T> Found: DistrictDelegate
}