basically same discussion as the list literals

kotlin probably has a extension function for Optional to unpack it into a Nullable

Hey all, I’m presenting a talk on Kotlin for my team, and would like to order some gear/swag to promote Kotlin! Can anyone point me in the right direction? Looking for things like pins, stickers, etc. that were handed at at KotlinConf. Thanks, and apologies if this is the wrong channel!

It's platform dependent

I am getting this error since I updated everything to align to version 1.2.70, this was working before, what happened?

is there any micro improvement to use explicit types in relation to compilation time? In Swift you can get faster compilation time if you set explicit types, I am not sure how Kotlin deals with it.

Hello guys... any resource you have about testing if in app purchases in android work fine?

yo guys. i read somewhere about kotlin value classes, but cant find where

tl;dr thicc generated code

Facing a weird case here, I have the following function:

fun <T> test(param: T) {
    val clazz = param::class
}

And the compiler complains (rightly so) that param has a nullable type 'T'. It even suggests using

!!

to make it non-nullable, but if I do that, the compiler still complains with the exact same message. Here are a few more variations I've tried, each one with the same error message:

val clazz = param!!::class
val clazz = param?.let { it::class }
val clazz = if (param != null) param::class else null

So, how am I supposed to get to the class of

param

here? Is this a bug with type inference or am I missing something? Making

T

reified or constrain it to

Any

is not an option.

Is there any way to use private functions on inlined functions? I know it does not make sense for the compiler, could be implemented any special visibility modifier for inline functions?

Does

Array

and

{Int,Float,...}Array

implement

Iterable

? I'm trying to write a method that can take either as input.

Is

suspend fun main

always

runBlocking

?

Even if you want to keep the old code style, please specify the kotlin.code.style=obsolete

What is the old code style?

Why spaces and no tabs?

would anyone be down for kotlin adding the ability to bound an if condition like this

if foobool then

instead of

if( foobool )

? i would enjoy it for when using

if

and

else

as a ternary operator

why the hell is repository annotation not repeatable, thats a obvious oversight

Is there a way I could replicate Android's

@CallSuper

lint outside of an android project using ktlint or something?

Congratulations with 1.3RC. Blog article says "Ktor is wrapping up its API and looking forward to your feedback." I'd like to give some feedback. What channel I should put it? ktor.io says "Head over our #ktor Kotlin Slack channel", but there is no #ktor in my kotlinlang.slack.com list. May someone invite me there?

When will IDEA plugin for 1.3RC be released?

What is the most idiomatic library for simple data access? I found Vert.x, but it looks complicated. What I need is just execute a stored procedure asynchronously (coroutines) and loop over returned recordset.

Where can I get the kotlin-gradle-plugin for 1.3-RC? Is it on a separate repository?

📣 Information about trying 1.3-RC is in the blog post: https://blog.jetbrains.com/kotlin/2018/09/kotlin-1-3-rc-is-here-migrate-your-coroutines/#how-to-try

There was

future

function (builder?), now it seems gone:

what to do?

is

Persion

a typo ?

i think something like this may be what you want

contract {
        returns() implies (this@save is Person)
    }

If you have a class whose instances must always exist within the context of an instance of another class.