hey kotliners quick question, kotlin enum and jpa @Enumerated annotation I can't seem to find any information on this. In normal Java I use it to specify storing the string value and not ordinal value, but hibernate seems to not like it with kotlin enum

Been trying to get Spek to work but end up with the mysterious/unhelpful Test framework quit unexpectedly message ✨ when running a test via the Spek plugin in IntelliJ.

I'm getting an NPE when trying to access my lazy val .. can't debug it either.. the breakpoint doesn't fire, so that seems to explain why the val is not being assigned the lazy result... so my question is, is accessing a lazy val of a subclass called from a constructor of a parent class not supported? ( in my case it is not a direct parent calling the code that ultimately triggers the acccess in the subclass containing the lazy defined property, more like the ultimate parent the one that extends

Object

it is a java class, its subclasses are all Kotlin)

@Danilo Herrera 1) Why did you use MutableCollection? Do you really need mutability? 2) As user of your function I would prefer receiving LotteryResult(...) from pickLottery function, not String. 3) I will add configurable seed for random for future testing 4) Are extension functions really needed? I would prefer e. g. private fun takeRandom(set, count): LotteryState -> LotteryState(setWithoutPicked, pickedNumbers) 5) mayble your functions should be inside class Lottery and only pickLottery should be public?

Now I would suggest closing LotteryPicker class, There is no need to create specific subclasses.

Suppose I have something like:

class Client(host: String = "localhost", port: Int = 50551, enableTls: Boolean = false)

. Now I would like to call the

constructor

with a different

port

, like:

val client = HelloWorldClient(443)

. Is there anything like a "wildcard" or something I can use that fills up the missing parameter? Something like

val client = HelloWorldClient(_, 443)

...

Hi, going through hard part of making kotlin acceptable for our processes. Have to fill a long excel sheet 🙄 with different questions. Is there any resource anybody can point me to which is useful in that context. Like prospects and risks for the language etc. I have this for now: https://docs.google.com/presentation/d/1zYWyDedyf0YhnLFF3TVpUqU3C8PKTuvR5P06L99MRn8/edit?usp=sharing https://plus.google.com/+JakeWharton/posts/WSCoqkJ5MBj Anything more similar to above?

Hi guys, given that I needed to declare a fun before referencing it I wondered is the Kotlin grammar LL(k) conformant? Perhaps even LL(1)? in terms of syntax analysis, and is there a grammar reference in some notation available seeing that their isn't a KLS 🙂 ?

is it possible to make when on enum properties?

Anyone know under what maven dependency I can find JUnitPlatform.class - ? Listed under how to use spec with maven, but I can't find it on central... 🤔

This message was deleted.

https://github.com/AnkitDroidGit/Dagger2Retrofit2RxKotlinRxAndroidApplication kotlin project with dagger2

if (value in listOf(A, B)) { ... }

and just import

A

and

B

directly

wasn’t there a way to use enums like ints or something? What was that called?

@redrield Based on the code that you show, I think this statement is not true: "And I need the continue statements". You can use `let`:

taskCache[s]?.let { cachedValue ->
    ...
}

message has been deleted

Idea refactorings should change string references too.

I have the following code:

data class SquadEntry(
        val name: String,
        var leader: OptionalPresence<UUID> = OptionalPresence.empty(),
        var color: OptionalPresence<String> = OptionalPresence.empty(),
        var tag: OptionalPresence<String> = OptionalPresence.empty(),
        var members: OptionalPresence<Set<UUID>>
)

Every time I want to write to a field e.g. leader I have to do leader = OptionalPresence(value). Is there a way to use something like delegate properties to simplify this process?

why are you not using nullable types?

I am doing a proof of concept of that shows off kotlins features and abilities. What are some areas should I focus on that might get my employer to buy in using Kotlin?

I am really not convinced by the NPE problems argument. 1. I have rarely if ever had a Java program blow up due to NPE. 2. Kotlin's protection from NPE ends whenever you use platform types. Those are not solved satisfactorily IMO.

var res = someJavaFuncThatActuallyReturnsNull()
// res is now SomeJavaType!
// at this point I can start passing 'res' around and later access anything on it and get an NPE, Kotlin didnt help at all

What might be good channel to get feedback on a own project which belongs in the android world, but is not written with the sdk (its for CI with android)? Took Kotlin for a spin to jenkins and now we are represented there as the first(?) or at least currently only plugin written in Kotlin there.

I'm getting an

IncompatibleClassChangeError

on JDK 9 that I'm not expecting. https://travis-ci.org/junit-team/junit5/jobs/270169944#L1267-L1268 I'm not sure why but I seem to be getting it from this test. Any thoughts on why this might occur on JDK 9 but not JDK 8? https://github.com/junit-team/junit5/pull/1001/files#diff-140541d5d08c428c13588c5f777f9218R49

"poohbar [20:24] I am really not convinced by the NPE problems argument." - nor am I, this to me seems very overblown, yes in C null pointers are an issue for example but rarely in Java have they arose as something significant in nearly fifteen years working with Java

yeah, I've considered how hard it'd be to contribute a compiler flag or something that would make platform types act as nullable. We're using Kotlin in a many-year-old Java codebase at my work, and everyone agrees that platform types are the single most painful part of using Kotlin

reported https://youtrack.jetbrains.com/issue/KT-20003

Our team had a big discussion around this whether need to use some third party library to do this? I know this is not Kotlin best practices, but I am curiosity to know reason behind

I’m using on production both php and kotlin, and I feel ok 😄

Has anyone seen this weirdness before? (Javadoc generation for JDK 9)

:junit-jupiter-api:javadocPicked up _JAVA_OPTIONS: -Xmx500m
javadoc: error - An exception occurred while building a component: TagInfo
	(com.sun.tools.javac.code.ClassFinder$BadClassFile: bad class file: /home/travis/build/junit-team/junit5/junit-jupiter-api/build/classes/kotlin/main/org/junit/jupiter/api/AssertionsKt$sam$Supplier$i$44378ebd.class
  undeclared type variable: T
  Please remove or make sure it appears in the correct subdirectory of the classpath.)
Please file a bug against the javadoc tool via the Java bug reporting page
(<http://bugreport.java.com>) after checking the Bug Database (<http://bugs.java.com>)
for duplicates. Include error messages and the following diagnostic in your report. Thank you.
com.sun.tools.javac.code.ClassFinder$BadClassFile: bad class file: /home/travis/build/junit-team/junit5/junit-jupiter-api/build/classes/kotlin/main/org/junit/jupiter/api/AssertionsKt$sam$Supplier$i$44378ebd.class
  undeclared type variable: T
  Please remove or make sure it appears in the correct subdirectory of the classpath.
	at jdk.compiler/com.sun.tools.javac.jvm.ClassReader.badClassFile(ClassReader.java:278)
	at jdk.compiler/com.sun.tools.javac.jvm.ClassReader.findTypeVar(ClassReader.java:963)
	at jdk.compiler/com.sun.tools.javac.jvm.ClassReader.sigToType(ClassReader.java:670)
	at jdk.compiler/com.sun.tools.javac.jvm.ClassReader.sigToType(ClassReader.java:732)
	at jdk.compiler/com.sun.tools.javac.jvm.ClassReader.sigToType(ClassReader.java:656)
	at jdk.compiler/com.sun.tools.javac.jvm.ClassReader.readType(ClassReader.java:499)
	at jdk.compiler/com.sun.tools.javac.jvm.ClassReader$11.read(ClassReader.java:1193)
	at jdk.compiler/com.sun.tools.javac.jvm.ClassReader.readAttrs(ClassReader.java:1537)
	at jdk.compiler/com.sun.tools.javac.jvm.ClassReader.readMemberAttrs(ClassReader.java:1527)
	at jdk.compiler/com.sun.tools.javac.jvm.ClassReader.readMethod(ClassReader.java:2391)
	at jdk.compiler/com.sun.tools.javac.jvm.ClassReader.readClass(ClassReader.java:2641)
	at jdk.compiler/com.sun.tools.javac.jvm.ClassReader.readClassBuffer(ClassReader.java:2706)
	at jdk.compiler/com.sun.tools.javac.jvm.ClassReader.readClassFile(ClassReader.java:2719)
	at jdk.compiler/com.sun.tools.javac.code.ClassFinder.fillIn(ClassFinder.java:348)
	at jdk.compiler/com.sun.tools.javac.code.ClassFinder.complete(ClassFinder.java:285)
	at jdk.compiler/com.sun.tools.javac.code.Symbol.complete(Symbol.java:633)
	at jdk.compiler/com.sun.tools.javac.code.Symbol$ClassSymbol.complete(Symbol.java:1314)
	at jdk.compiler/com.sun.tools.javac.code.Symbol$ClassSymbol.flags(Symbol.java:1248)

https://travis-ci.org/junit-team/junit5/jobs/270479723#L1179