@thomasnield Unfortunately there's no way for consumer of an Iterator to convey though its interface that it's not going to be iterated anymore.

Any library devs that can help me on this?

This is ugly:

val thisIsAByte: Byte = getValueFromMagic()
when (thisIsAByte) {
    0x00.toByte() -> LOCKED
    0x01.toByte() -> UNLOCKED
    0x02.toByte() -> UNLOCKED_AND_AUTO_RELOCK_DISABLED
    else -> throw IllegalStateException("Unexpected value for lockState: $it")
}

Hope we will soon be able to get rid of the

toByte()

calls

Does anyone have any information about how the kotlin jvm source maps work?

that is kinda weird, dunno why invoking

println

would need to care about coercing

Int?

to

Int

but it's necessary, otherwise

Result

doesn't know which value it contains!

Does anyone know if there is a way to verify code snippets in Kotlin docs? For example if I document a function and include an example of how to use it, to verify that it works as intended? Similar to rust or python? Example for python: https://docs.python.org/2/library/doctest.html

Hello everyone! New to this slack, so please let me know if I am posting in the wrong channel. I am in the middle of creating a kotlin library that has wrapped some of its functionality in coroutines. My understanding is that coroutines are not accessible when calling from Java. Has anyone come up with a good way to provide similar functionality to Java projects? I would prefer to stay away from RxJava - was hoping there was a smart way to use kotlin to do this.

is there a way to create a single element

Iterable

without creating an array or list?

hm, weird, it's working for me, it resolves the extension method when I do:

val str = "Foo"
        val str2 = "foo"
        str.equals(str2, ignoreCase = true)

How come so many files in the stdlib are classes rather than kotlin files?

Do you prefer a lambda initializer ( { SomeClass() } ) or reflection with classes ( SomeClass::class.java )? I like lambdas much more, but which is more performant?

Is it better to use

variable?.let{...}

or

if (variable != null) {...}

?

Would it help if

append

was inline? Or am I misunderstanding the issue?

I believe the idea is to use the GUI framework of the Kotlin platform: JVM → Spring/JavaFX, Native → iOS/Android/Windows/macOS

Is there any kotlin wrapper around the browser API to build extensions?

ok cool, i refactored the extra classes in KeyGrantController to separate .kt files, but KeyGrantController.kt icon didn’t change and I restarted IJ

Aloha, friends. I'm somewhat new to Kotlin and absolutely loving it. I've been working in Java, Go, and the various Cs for years. I get so much more done. But, I have a question, and I'm not hoping for a sales pitch, but an honest evaluation. I working with some others on an open source, non-profit project. It's an api and a set of consumer apps centered around open science and environmental conservation. It looks like we'll have some funding for a core team, but I wanted to make the entry easy for the open source community to get involved. I'd really love to use Kotlin, as we could share a lot of the core logic between Android, Native, Server, and Devops. But, I'm not sure if there are enough Kotliners out there to have an impact on an open source project. My other alternative is to cobble together PHP, Ruby, Cordova, etc, which I really don't want to do. Does anyone else have experience with this kind of decision? Is it too hard to find kotliners for open source projects? I know its a pretty low learning curve, but it still exists. Is the brevity and code reuse worth the trade-off of a limited talent pool? Really appreciate any feedback.

so, I had some kind of event handler in java which worked, but now since I converted to kotlin it doesn't anymore. I am checking if (java) event Class isInstance with the method I have, and it returns true, but then if I try to method.invoke(method), it throwns an exception about "object is not an instance of declaring class". what can I do ?

But I guess the compiler is putting in the expression string as a parameter, so I'm wondering if there is another way to get an expression at runtime

Hi everybody, I'm brazilian and I'm new in here, my english is not too good, but I hope to learn and make some friends on the way.

I wouldn't advise field hiding

is there a better way to do this?

url = uri(System.getenv("JRS_S3_URI") ?: uri(""))

Hi. Is there clean way in Kotlin to get list of properties of given Instance. Each individual and known property would be like ::property but I want to get list of all - without diving into actual java low-level reflection BS

sorry, but I think I'm mixing things up, what do I need for kotlin eap

maven { url "<https://dl.bintray.com/kotlin/kotlin-dev>" }
maven { url "<https://dl.bintray.com/kotlin/kotlin-eap>" }

The first one? The second one? I cant test, because I have already everything cached and I'd need to delete (and download again) gb of stuff (.gradle) just to try

not sure why Deque gets no love in the jdk stdlib, but that'd sure look nicer with

arrayDequeOf(this)

are you like writing a Kotlin fundamentals blog post or something similar?

oh, maybe it’s because the share arrow kinda resembles a reply arrow 🤔

📣 pretty please, use threads :thread-please: instead of quoting messages