Is it known, that trykotlin does not show anything in the 'Genrated classfiles' tab? Works fine for 'generated JavaScript code'

@semoro nope, I only tried to write one, then deleted that line...

@orangy pro tip: don’t use gradle...

1.1 allows

_

for unused parameters of lambda expressions (and it seems also for unused values in a destructive assignments). Why does that not also work for unused parameters of methods? e.g.

fun main(_: Array<String>) {

@nkiesel this is really only useful for

main

, since parameter names should match parent's when overriding so that named arguments work properly. idea even has a warning for that

Was anybody successful running spek + mokito2 + spring?

@nkiesel you shouldn't get any unused parameter warnings on either

main

or implemented interface methods, even if you don't rename them to

_

Hey guys. do you have any issues with intellij refusing to realise that it has configured projects for Kotlin? Mine simply refuses to close the "Kotlin not configured" "yellow bar" at the top of the editor even though I've run through the hoops and it says it has added Kotlin to the projects.

is nested destructuring on the roadmap?

Hi guys. Is there an easy way to exclude a property from being used in generated toString() in data class (without implementing my own toString())?

Whom from JetBrains may I ask about the DSL marker design?

@mg6maciej Here's what I did, in Kotlin 1.1:

fun <T> List<T>.batched(batchSize: Int): List<List<T>> {
    check(batchSize > 0) { "Invalid value for parameter 'batchSize': $batchSize (should be greater than 0)" }
    val batchAmount = (size + batchSize - 1) / batchSize
    val result = List<MutableList<T>>(batchAmount) { ArrayList(batchSize) }
    var index = 0
    forEach { result[index++ / batchSize].add(it) }
    return result
}

You seem to care about optimization, so note than when called on a

LinkedList

, your implementation does a O(N)

get

call on line 13

@svenjacobs looks like https://youtrack.jetbrains.com/issue/KT-16184

is this intentional?

is it intended behavior that

fun ParseNode.accept(visitor: Visitor){
    when(this){
        is NodeTypeA -> this.internalAccept(visitor::visitEnter, visitor::visitLeave)
    }
}

private fun <T> T.internalAccept(enter: (T) -> Unit, leave: (T) -> Unit): Unit = TODO()

will not compile without the

this.

infront of

internalAccept

? It seems like theres a corner case I'm hitting between smart casting and type inference that isnt covered here.

@smcvb We've hit this too. It sounds like https://youtrack.jetbrains.com/issue/KT-15778

kotlin 1.1 gradle incremental compilation is broken for me, it recompiles every time. What can I do to create a useful bug report if I can't share the project (closed source)? Maybe some compiler switch to produce additional logs?

hey! after plugin upgrade to 1.1 version can't make a project in IDEA with the following error: Error:Kotlin: [Internal Error] org.jetbrains.kotlin.codegen.CompilationException: Back-end (JVM) Internal error: wrong code generated org.jetbrains.kotlin.codegen.CompilationException Back-end (JVM) Internal error: Couldn't transform method node: next ()Lkotlin/Pair;: has anyone seen it? any workaround? maybe there is a way to downgrade the plugin in IDEA?

How do I create a map with case-insensitive string keys? Currently do so

mapOf(…).toSortedMap(CASE_INSENSITIVE_ORDER)

Is there any way to construct an instance that will equal any other object? This comes close:

val any = object {
    override fun equals(other: Any?) = true
}

but only works when doing

any == "Test"

, not the other way around:

"Test" == any

. Is there any way to make the latter work?

Does it make sense that calling the following extension function on a null

String?

would print

int?

inline val <reified T : Any?> T.TAG get() = ((this as? Any)?.javaClass?.simpleName ?: "${T::class.java.simpleName ?: "null"}?").replace("CompanionObject", "")

does

toMutableList

on a mutable list copy that list? Otherwise, how do you copy a list? I could use the

ArrayList

constructor but if there is a kotlin way of copying a list I'd rather do that.

@groostav It seems an odd thing to do to me, but here’s a way:

fun <T> split(values: List<T>, vararg lengths: Int): Sequence<List<T>> {
    val lengthsSeq = lengths.iterator()
    val valuesSeq = values.iterator()
    return generateSequence { if (lengthsSeq.hasNext()) List<T>(lengthsSeq.next()) { valuesSeq.next() } else null }
}

val result = split(listOf("one", "two", "three", "four", "five", "six", "seven", "eight"), 3, 2, 3).associateBy { it.first() }

assertEquals(result, mapOf(
        "one" to listOf("one", "two", "three"),  //row length == 3
        "four" to listOf("four", "five"),        //len == 2
        "six" to listOf("six", "seven", "eight") //len == 3
))

With type aliases in place you cannot go to declaration (

cmd+B

,

cmd+click

) or see args of constructor (

cmd+P

inside brackets; tooltip is micro and empty), e.g.

public typealias ArrayList<E> = java.util.ArrayList<E>

gradle will automatically bump up the stdlib to 1.1 if necessary to keep things consistent

Hello, I was gonna ask a question about delegation here but since it became too long i moved it to StackOverflow instead. If I may be so bold I will still link it there tho 😈 http://stackoverflow.com/questions/42669433/kotlin-how-are-a-delegates-get-and-setvalue-methods-accessed

Is this still the nicest (or only) syntax for multiple annotations on a field?

@field:[Inject Named("ActiveBudgetId")] internal lateinit var activeBudgetId: String

Not quite as nice as the Java equivalent

@Inject @Named("ActiveBudgetId") String activeBudgetId;

Hello, please advise where to start (what web framework) if I want to use asynchronous web server with asynchronous postgres driver (found port from scala). Coming from Scala, new in Kotlin, now in process of selecting the platform. Thanks in advance!

How do I overpower a Java

div

method??? http://stackoverflow.com/q/42666760/3144601