why there's no difference between the output of these two? Im trying to understand when to use

k()

and when not to use it.

val fruits = listOf("apple", "aabb", "ab", "apricot", "banana", "blueberry", "cherry", "coconut")
val evenFruits = fruits.k()
            .fold(listOf<String>()) { acc, e -> if (e.length % 2 == 0) acc + e else acc }

val evenFruits2 = fruits
           .fold(listOf<String>()) { acc, e -> if (e.length % 2 == 0) acc + e else acc }

println(evenFruits) 
println(evenFruits2)

i'm saying it'd be nice if i didn't have to write

toDouble()

all over my mathematics in kotlin 😑

Excuse me for my non-technical question, but are there any French people here? I would like to create a French community (meetup) in the Bordeaux region.

object CachedDB {

    val Foods = object {
        fun loadAll(): List<Food> = ...
    }
}

I want to be able to call that function like this

CachedDB.Foods.loadAll()

but I can’t Do I have to move it all into a separate file?

Is there annotation (1.2.x) to force compiler to rise error on not-exhaustive

when

?

The only way I can hotswap right now is by going to Run -> Reload Changed Classes in debug mode

Hello Anybody knows how to exclude null values when we try to serialize some object into, for example, json?

guys, is there a way to install Kotlin 1.3 plugin into Idea 2017.1? it offers me only 1.2.41 😞

What tools can I use to generate media rich documentation from annotated runnable code? I have prepared an example of what I want to do in a gist: https://gist.github.com/edwinRNDR/917fe9398e8e0571e518f750df25b136 . It basically requires a tool that transforms Kotlin source code and I am not sure if such a thing exists

Hi, I am trying to make custom annotation for Guice in kotlin codebase, it currenly doesn't recognize kotlin annotations it seems. There was a suggestion to use kapt to make it work, but I am not sure what exactly should I do with it

A dedicated #releases channel would be nice for public announcements of new Kotlin versions or the libraries/tooling around it 🙂

how can I solve this warning?

Hey I am playing with teamcity Kotlin DSL configuration. 1. First problem is that I don’t have code completion, so I don’t know what syntax I can use (my configuration is stored in project

.teamcity/settings.kts

) - AS 3.2.1 2. Secound is that I can’t find link to proper documentation, where all the DSL syntax is explained in detail

For standalone (non-Android) applications, what is everyone's preferred DI library?

As a regular user of the Dash offline API reference browser, I'm seeing a lot of uninstallable javadoc libraries (

httk4k

and

vavr-kotlin

for instance). Both have published javadoc jars that are empty apart from the MANIFEST, and both use Gradle to build. Also, the Kotlin stdlibs are missing from the available docsets. It feels that this is a systemic problem for Kotlin, and one that is a real negative for someone, like me, who likes to read the statement of how the code is intended to be used, rather than just relying on the current implementation (in source) Are there any plans to fix this?

Sorry, may I ask why the

kotlin.Result

class set to inline class? what's the point of this limitation that we cannot use it as return type?

Or do I have to do that optimization manually?

Hi! I have a project with kotlin.version 1.2.61. Since a few weeks ago I get a problem every now and then where it can’t resolve the “kotlinx.coroutines.experimental”-package in intellij and it suggests me to change to the kotlinx.coroutines-package for things such as runBlocking etc. Has anyone seen something similar? Have I upped a plugin which I shouldn’t have?

can i tell the kotlin compiler that it should not allow to use jdk methods that are not in jdk 1.8? (that have a

@since 9

annotation for example). or do i have to use 1.8 to build?

Hi guys, how to suppress

Condition is always 'true'

? I tried to use

@Suppress("SENSELESS_COMPARISON")

and

@SuppressWarnings('ConstantConditions')

but both are not working .

oh ok...

hey folks, is there a way to combine property and interface delegation? Something akin to:

interface Foo {}
class Bar(): Foo {}

class DelegatedFoo: Foo by foo {
  val foo by lazy { Bar() }
}

How comes

kotlin-scripting-common:1.3.10

depends on

kotlinx-coroutines-core:0.26.1-eap13

(an outdated EAP version)?

Is it not possible to call an inline lambda with another inline lambda as argument? Conceptually I think it should be, but I guess the compiler does not actually support it? I get an

illegal usage of inline argument block

error

only seems to validate the protocol https://docs.oracle.com/javase/8/docs/api/java/net/URL.html#URL-java.lang.String-

When I do this, am I creating an instance of DisposableProvider for each Interactor instance?

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