ok I answered myself: "Extension functions/properties are compiled to static JVM methods. Generally they are located in another class in some other package than the class they're extending, so it's not possible to call protected methods of that class due to VM accessibility rules."

Are Kotlin 1.3.20 and Kotlin DSL 1.1.1 (or the embedded compiler) incompatible?

> Configure project :buildSrc
WARNING: Unsupported Kotlin plugin version.
The `embedded-kotlin` and `kotlin-dsl` plugins rely on features of Kotlin `1.3.11` that might work differently than in the requested version `1.3.20`.

> Task :fluid-json-basic:compileKotlin
Compilation with Kotlin compile daemon was not successful
java.lang.Exception: Parameter specified as non-null is null: method org.jetbrains.kotlin.incremental.CacheVersionsKt.customCacheVersionManager, parameter fileName
        at org.jetbrains.kotlin.daemon.common.CompileService$CallResult$Error.get(CompileService.kt:60)
        at org.jetbrains.kotlin.daemon.common.CompileService$CallResult$Error.get(CompileService.kt:59)
        at org.jetbrains.kotlin.compilerRunner.GradleKotlinCompilerWork.compileWithDaemon(GradleKotlinCompilerWork.kt:192)
        at org.jetbrains.kotlin.compilerRunner.GradleKotlinCompilerWork.compileWithDaemonOrFallbackImpl(GradleKotlinCompilerWork.kt:132)
(…)
Could not connect to kotlin daemon. Using fallback strategy.

warning: the '-d' option with a directory destination is ignored because '-Xbuild-file' is specified

BUILD SUCCESSFUL in 1m 24s

nevermind, was just me being stupid ¯\_(ツ)_/¯

https://twitter.com/kotlin/status/1160917597254246403 Check out our highlights video from previous years of @kotlinconf, and please welcome our new line-up of speakers for 2019! #kotlinconf https://t.co/DYs1O1s9bX https://t.co/xdu59QXvBt Twitter

can someone please tell me why all of a sudden I'm getting these kind of compile time exceptions on code that was ok on IDE?

Type inference failed. Expected type mismatch: inferred type is Observable<Optional<out String>!>! but Observable<Optional<String>> was expected

Hello, how i can manually create src dirs for kotlin gradle project in intellij idea 2019.2? With 2019.1 we can easily do it with settings, but with 2019.2 i cannot find this option

neo4j for pure kotlin is available?

Does anyone from the JB team have some cycles to follow up on this KEEP proposal? https://github.com/Kotlin/KEEP/issues/184

Security Vulnerability Advisory fixed in Gradle 5.6 Public Advisory: https://github.com/gradle/gradle/security/advisories/GHSA-4cwg-f7qc-6r95 Public Discussion: https://github.com/gradle/gradle/issues/10278 Posted in #gradle

Is there any way to get IntelliJ to wrap long kdoc comments? I saw this [bug report](https://youtrack.jetbrains.com/issue/KT-19963) but other than that i haven't seen much... How do you guys do that?

resources is the root of the classpath

Yep. Alternatively, you can go read hundreds of stack overflow posts that assume circumstances not in play and therefore don't work and write a string permutation app that can find one that does work and never be able to replicate it again, which is what I have done at various times. 🙂

In java it works fine - in goland it works fine

But for kotlin its much slower

I updated and restarted but still a visible lag

how do i convert between

Long

and

BooleanArray

so that I can easily read/write each bit as a

Boolean

?

Is there any way to view the generated byte code on play.kotlinlang.org?

Is there a construct for

add this to list if not null

?

Perhaps

list + listOfNotNull(nullable)

, but it's kinda weird

if (nullable != null) list + nullable else list

Not as short, but very readable

If it happens more I would extract extension function with good naming

If I change the interface to a function instead of a property, everything works fine, but then the API is not great for Kotlin usage

@Throws(Exception::class)
   fun getFeatureNames: ArrayList<String>()

Looks like

v1.3.50

is coming out

Hello, Does someone have pointers on how the runnable snippets from the Kotlin Playground work? Like on medium.com I'm trying to add support for it on dev.to

Ok, I have found my answer https://github.com/JetBrains/kotlin-playground thank you for the rubber duck debugging!

Another big one getting close https://github.com/Kotlin/kotlinx.coroutines/pull/1462 (PR of coroutines 1.3.0)

Now we're really close 😁

getting anxious 😅