kotlinlang #announcements

So about this "new type inference" feature, is there some formal discussion or docs available on this? The only thing I'm able to find is Svetlana's Kotlinconf talk, and some 'informal' descriptions like in https://kotlinlang.slack.com/archives/C0922A726/p1540842295383000?thread_ts=1540837535.363900&cid=C0922A726. Since turning it on using

-XXLanguage:+NewInference

results in things breaking due to overload resolution ambiguity, I'm curious what the options are to mitigate this?

Hamza

10/30/2018, 12:58 AM

what are some practical cases of inline classes though? Doesn’t typealias already kinda do what inline classes do

mattinger

10/30/2018, 1:00 AM

someone mentioned above doing things like unit conversions. Looking at what the restrictions are, i think that might be a good use for it. It's unclear to me if you can make an inline class implement an interface though.

mattinger

10/30/2018, 1:17 AM

i would think the above might be more efficient that

60.seconds.inMinutes

just because there's no overhead of class creation. Thoughts?

Kulwinder Singh

10/30/2018, 4:18 AM

what is difference between both ? kotlin-stdlib- jdk 7 vs kotlin-stdlib-jre 7

Nikky

10/30/2018, 4:31 AM

i think the question was more about the kotlin-stdlib-jre7 compared to kotlin-stdlib-jdk7 and i think this is mostly a rename

Suraj

10/30/2018, 6:20 AM

hello folks, I was trying to understand

internal

modifier and found that visibility is restricted to a module. And definition of module in context of gradle as per doc is :

a Gradle source set (with the exception that the test source set can access the internal declarations of main);

a)What does

gradle source set

mean? Does it mean a gradle module(talking in terms of an android project) or some subset of it? b)Do we have any advantages of using internal in a multi module project? like reduces incremental build time or so?

svenjacobs

10/30/2018, 6:40 AM

Hi, is there a channel on this Slack for promoting new Kotlin-specific libraries? I'd rather ask before I spam 😉

adibfara

10/30/2018, 7:36 AM

This is not a directly Kotlin related question, but it can be used with Kotlin too, how do you navigate to the implementation of an abstract function, in a specific implementation class? suppose you have an

Animal

class that has

abstract fun run()

and you have

class Dog : Anima() { //implements run }

and you have an instance of dog and usage of

run()

somewhere

Copy code

kotlin
val dog = Dog()
dog.run()

how do you navigate to

run

implementation in Dog?

stackoverflow 4

Saiedmomen

10/30/2018, 8:05 AM

Does Kotlin Multiplatform support Maven?

Thomas Legrand

10/30/2018, 8:34 AM

Hello, did anyone try standalone scripts with Kotlin 1.3 ? I’d like to see a clear example

Stefan Mitev

10/30/2018, 9:49 AM

I utilize kotlin's delegate functionallity for this. I am not the author of this, but I do something similar: https://gist.github.com/toddway/14527bfd94d132c3b1998e38ba68d6ff

karelpeeters

10/30/2018, 11:25 AM

Most of those things should be moved up a bit!

Onur

10/30/2018, 12:20 PM

Is there any plan to support recursion and conditionals in Kotlin Regex?

Egor Trutenko

10/30/2018, 1:34 PM

Why does actually Kotlin lacks extension functions (like

apply

let

) which return

Unit

? Something like

fun <T> T.end(block: T.() -> Unit): Unit

Edgars

10/30/2018, 2:47 PM

What are my options if I want to supply a default value if an object is null when chaining calls?

afernan

10/30/2018, 3:15 PM

hmm, i think i've found it

when(A) A@ {...

Paul Woitaschek

10/30/2018, 3:29 PM

-.kt

user

10/30/2018, 4:34 PM

https://twitter.com/kotlin/status/1057309700277047296 Todd Ginsberg @ToddGinsberg explains the new features of Kotlin 1.3 in detail: https://todd.ginsberg.com/post/kotlin-1.3-features/ Twitter

👍 6

Dias

10/30/2018, 7:51 PM

how much of intellij idea is written in kotlin?

👍🏼 1

Travis Griggs

10/30/2018, 8:53 PM

Was just catching up on the 1.3 announcement. I’m very excited about the unsigned ints stuff. I do a bit of protocol work. But I’m curious how they implement that on top of the JVM which does NOT have unsigned ints. Does anyone know? Are there performance implications?

karelpeeters

10/30/2018, 10:07 PM

Not sure where to ask this, but are the "go to source" buttons on the website gone?

👍 1

10/31/2018, 12:02 AM

just wondering if there’s a way for gradle builds to fail fi not formatted with the new official style guide released in 1.3

10/31/2018, 12:03 AM

we use kotlin primarily for server side code and ktlint seems a bit restrictive with it’s quirky rules because of android

Mark

10/31/2018, 4:43 AM

Copy code

var x = ...

Copy code

when (x) is X ->

// cannot use x as X unless use

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x as X

Is there any other way apart from make

Copy code

val x

muralimohan962

10/31/2018, 6:25 AM

Copy code

class SomeClass {
    private InnerClass innerClass = new InnerClass();

void foo() {
    String name = innerClass.name;
}

private static class InnerClass {
        private String name = "Murali";
}
}

When i convert this code into kotlin using kotlin converter in IDEA i got an error at innerClass.name showing the name is private. But that works fine in Java. Please show me how to achieve the same in kotlin!

ibash

10/31/2018, 6:30 AM

Copy code

fun foo() = runBlocking {
  // some method that takes a block
  someOtherMethod {
    // want to access surrounding scope here
    async { ... }
  }
}