so, if I have a Java class with three constructors that I’m extending, is there a way to call a different

super

constructor based on the parameters supplied?

can somebody explain why

Iterable<T>.all(...)

returns

true

if the collection is empty?

What is the best way to interop with MacOS / Cocoa from Kotlin Native? I only found https://github.com/udalov/kni which seems to be discontinued. Thanks in advance for some hints.

*. become (.+?)\\. and *. become \1

@groostav Take a look at https://github.com/VerbalExpressions/KotlinVerbalExpressions, seems pretty nice for readability.

Is there a way to shorter this

listOf(1) + listOf(2,3,4,5)

. Something like this

1 :: listOf(2,3,4,5)

.

Check if

t

is

Iterable

inside your

concat

, and skip the

listOf(t)

is true

Hi all May be I'm not perfectly google it But why when do I create Gradle with Koltin project, automatically generated java packages in main and test modules?

On the browser it’s there but not on mobile

Hey guys, is there a way to tell the compiler to not accept generic types as reified type argument?

inline fun <reified Value : Any> test1(): Value = TODO()
inline fun <reified Value : Any> test2(): List<Value> = TODO()

val test: List<Int> = test1()

In the example using

test1()

(accidentally instead of

test2()

) should raise an error because I cannot get the generic type of the

List

anyway.

bar(::foo)

is an unresolved reference however, receievr type mismatch

And you can't see it when zoomed to fill the form

The warning is :

Kotlin: Unchecked cast: Array<out Validator> to Array<Validator>

@jw this is java way and it works

return list.stream().allMatch(new HashSet<>()::add);

@elizarov Yeah i guess. My reason for wanting this is actually for the android data binding where i need to call notifyPropertyChanged in order to update the view. I guess it is technically not a data class then but it is more or less just holding on to data.

And another question - but I guess you more in coroutines than collections -> One "pain" I see in Kotlin is that if it uses vals on collections, it still is the same underlying java collection under the hood, and no possibility to use structural sharing when doing operations on collections - what Clojure does... so definitely there is performance loss whenever doing operations on immutable collections

Roman, and do I understand correctly that when writing my suspend function which actually establishes remote connection (Socket?) and does some query, I need to finally wrap it into suspendCoroutine(continuation ->) or suspendCancellableCoroutine - where exactly I doo the work, and then call the continuation result when I am done?

Is there a good way to get the version of kotlin programmatically from within java/kotlin/groovy code??

I considered something along the lines of

inline fun <reified T, R> Class<T>.reifyIn(f: () -> R): R = f()

but it didn't appear to help

@lynas https://kotlinlang.org/docs/reference/compiler-plugins.html#no-arg-compiler-plugin might be a better solution to your problem

I would like to delegate properties to other properties instead of providing getter and setter, is that possible? Perhaps using

val x by y.z

syntax? A concrete example is the following

interface A {
    val a: String
}

class AImpl : A {
    override val a = "hello"
}

interface B {
    var b: Int
}

class BImpl : B {
    override var b = 42
}

class C : A, B {
    private val _a = AImpl()
    private val _b = BImpl()

    // override val a by _a.a
    override val a
        get() = _a.a

    // override val b by _b.b
    override var b
        get() = _b.b
        set(v) { _b.b = v }
}

fun main(args: Array<String>) {
    val c = C()
    c.b = 11
    println("a=${c.a} b=${c.b}")
}

Will there be KotlinConf live streaming?

guys does any1 here uses evernote job manager? need an advice

Kotlin enums definitely extend

java.lang.Enum

, can you post your code and error message?

Publisch you project as a maven artifact and have you users include the dependencies like that, or build a fat jar.

guys does any1 know if there is a way to insert some rows in Room Db without triggering the Flowable observable?

I have created a Kotlin enum and need to pass it's Java Class equivalent to `org.neo4j.ogm.typeconversion.EnumStringConverter`'s (Java library) constructor. This constructor takes a

Class<? extends Enum>

, which I cannot figure out how to get from my Kotlin enum. I've tried

MyEnum

,

MyEnum.javaClass

and

MyEnum::class

all with/without companion object on MyEnum, all with different compile errors. How do I get MyEnum's

java.lang.Class<? extends java.lang.Enum>

?

Has anyone ran into issues with

@property

when writing KDoc? Using the Kotlin plugin for Android Studio it appears to break the generation of documentation for the tooltip window. Essentially everything after

@property

does not display. Sorry if this has already been discussed, I looked through the channel but didn’t see it popup

I'm totally new to Kotlin - I just installed IDEA and created a new Kotlin JS project. Unfortunately, I can't build due to this bug: https://youtrack.jetbrains.com/issue/KT-20650#tab=History How do I use the beta plugin that this is fixed in?

i need to convert that into the value

cos( .75 + pi)
== 0.9976...