Is there anyway I could get:

CompletableFuture<List<Person>>

from

List<CompletableFuture<Person>>

I can't wrap my head around it 😕

you will need a while loop if a continue is not sufficient 😛

Also,

api.getArtists()

is a suspending function itself so I haven't quite figured out how to overcome that yet since

buildIterator

is not a suspending context

I'm making a Kotlin cheatsheet for https://devhints.io and I'd appreciate any feedback you have. It doesn't have everything yet and I'm aware of that, but if you feel like something glaring is missing leave a comment on the PR. Thanks! 🙂 https://github.com/rstacruz/cheatsheets/pull/724

Hi i'm an android developer used to write my codes with Java i wanna learn Kotlin but im confused which resources are good to start anyone can help me?

Hi guys, I am trying to build dsl for tests that are currently written in Java and just rewrite them. When doing so I tried to run one test but it doesn't @Autowire some stuff in one of the java classes that I use. Other than adding kotlin to the dependencies of the project should I add something else or is it fixed in other way? 🙂 Sorry if it is not the right place to ask.

Is there a way to construct a sealed class with referenced children? Something like

sealed class Seal {
    class InnerClass: Seal()
    ReferencedClass::class
}

hi folks, Kotlin having any memory profiler like visualvm ? preferrably opensource

Hi folks, I could really use some help. I’m trying to take a template Kotlin / Spring Boot application and get it running with some real data. In order to do so, I need some way to wire in a path to a directory. I don’t care if it is a command line argument or a property read by Spring, but I can’t find a way to get either to work properly. 😕 right now, I’m trying the prop method, so I have

@Configuration @ConfigurationProperties class AppProps { @NotNull lateinit var sourceRoot: String}

and later on, inside a component class:

@Component class Platform(..., appProps: AppProps) { init { val sourceRoot = appProps.sourceRoot } }

but when I try to print that val, it is empty.

How can I convert a list with 4 elements:

mutableListOf(a, b, c, d)

to a map when

{a=b, c=d}

?

I dont think so

.chunked(2)

works too.

are companies really jumping into koitlin for development without going into mobile things?

Hi, I got this piece of code:

val nested = listOf(listOf(12), listOf(12))
    val (one, two) = nested
    println("$one, $two")

That throws IOFB exception, I do not understand why

What is the difference between

isEmpty()

and

none()

?

Anyone want to put in your recommendation as per this stackoverflow? https://stackoverflow.com/questions/51718229/kotlin-val-mutablelist-vs-var-immutablelist-when-to-use-which

Hi, after trying for several hours, I could really use some help.

sealed class MyTypes

class A : MyTypes()
class B : MyTypes()

class Wrapper<out T : MyTypes>(val wrapped: T)

val wrappedValue: Wrapper<MyTypes> = Wrapper(A())

val nothing = when (wrappedValue.wrapped) {
    is A -> doSomethingWithA(wrappedValue as Wrapper<A>)
    is B -> doSomethingWithB(wrappedValue as Wrapper<B>)
}

fun doSomethingWithA(a: Wrapper<A>) = Unit
fun doSomethingWithB(b: Wrapper<B>) = Unit

Is there any way I can get rid of the unchecked cast within the

when

?

by jetbrains? 😉

Does KDoc have any syntax support for providing URL links?

are collections completely immutable by default if you use val?

Is there something like "explicit interface implementation" ( like in C# , see https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/interfaces/explicit-interface-implementation ) ?

MutableMap.toMap() return mutableMap if size >1. How I should get immutable map from mutable map?

I have this simple class composition:

data class Account(a: Int, b: Int)

data class Person(name:String, account:Account)

is there a way to expose account's properties on person? anything better than:

val a get() = account.a

?

is it possible to have a generic operator overload?

Is Kotlin's singleton thread-safe?

Has anyone seen something like

val foo = bar ?: null.also { /* do something only when null */ }

If I don't have the fundamental or knowledge about Java. Can I start to learn Kotlin directly?

simple "Hello world" program give me Error :

This message was deleted.

yup, immutable data classes are sweet, especially with kotlin's named arguments but they become pain in the a** when using from java where you cant easily use

copy()

😞