class.name

?

Sometimes the java converter is driving me mad

Is there a way to define a generic function only for T which defines …`T.minus(T) -> T`?

Did someone ever experienced a situation where an

object

at runtime has multiple instances?

@hagabaka I’m talking about objects defined with the keyword

object

you sure can, but it must be declared at the top

Hi Everyone. I’m new to the Kotlin community and just finished my first little pet project to get acquainted with the stack. Would love to get some feedback on it from you Kotlin pros! https://github.com/snasirca/kdiff

Hey! New to Kotlin and this group and struggling to get an answer for how to use callback in the form of optional property. For example:

var onDownloadCompleted: ((data: ByteArray) -> Unit)? = null

Coming from Swift, I tried calling it using ? mark but it yields compiler error “(Error:(108, 26) Unexpected tokens (use ‘;’ to separate expressions on the same line)“:

onDownloadCompleted?(bytes)

So currently I’m using longer form which works:

if (onDownloadCompleted != null) {
    onDownloadCompleted!!(bytes)
}

But it feels so un-DRY for such a simple task, is there a simpler way? Or am I thinking in wrong direction and should use different callback approach?

Good Morning people... Sorry by my very very bad English .. I'm Brazilian and new with kotlin... but go try ... I see many examples in the web and all of them uses 'VAL' for create properties ... Then I think: When update an registry ... how to make? If 'Val' is equivalent to 'Final' of the Java ...

Ok..but why always uses VAL in examples?

why do I get here https://github.com/kotlin-graphics/assimp/blob/master/src/main/kotlin/assimp/format/collada/ColladaParser.kt#L554 the following error at `continue`:

'break' or 'continue' jumps across a function or a class boundary

? Shouldn't be working because

let

is inlined?

This message was deleted.

Any way to make IDEA collapse copyright headers in Kotlin files?

How could I get an expression to fire multiple branches of a

when

if the lhs matches

This message was deleted.

Have any of you used AOP with kotlin? For instance AspectJ?

just found out about

@DslMarker

. world turned upside down, not sure what to think. will sleep on it.

Hi guys! Do you guys know any good online courses to learn Kotlin? Planning to make an Android app with it

@Czar You might want to take a look at https://github.com/MicroUtils/kotlin-logging

@louiscad it’s already there

::class.java

is a compile time constant

and you can only

Foo.javaClass

if it has a companion object

Noticed that SDK Man fails to install Kotlin 1.1.60 with the following error message:

End-of-central-directory signature not found.  Either this file is not
  a zipfile, or it constitutes one disk of a multi-part archive.  In the
  latter case the central directory and zipfile comment will be found on
  the last disk(s) of this archive.
unzip:  cannot find zipfile directory in one of /home/napperley/.sdkman/archives/kotlin-1.1.60.zip or
        /home/napperley/.sdkman/archives/kotlin-1.1.60.zip.zip, and cannot find /home/napperley/.sdkman/archives/kotlin-1.1.60.zip.ZIP, period.

Will u [jb] add smth like #define from c++ - it whould be very useful feature (sometime typealias is just not enough)

Auto answering myself for being dumb, if you set androidExtensions.experimental = true doesnt enable kotlinx.android.parcel, but if you do androidExtensions { experimental = true } it does

I am passing a reference to a primitive

val i = 0

as

::i

(type

KMutableProperty0<Int>

) and everything worked fine so far. Is it possible to pass the reference of the i-th element of a primitive array?

okay, I overlooked something important, I'm using coroutines in the method. So

synchronized

worked as it should. But can I use it in

async(UI) { }

or make sure this block isn't executed in parallel

Is there any microservice framework, other than Spring? And for reactive programming?

@elect

val b
    get() = array[5]
    set(value) { array[5] = value }

and then use

::b

as mentioned i was trying to build a instance local property with a once evaluated and then cached value