kotlinlang #announcements

Does anybody have run kapt successfully on Java9? Due to soon-to-be-deprecated javax.xml.bind module, I'm getting an error saying javax.xml.bind.DataTypeConverter is not found. Adding a dependency to the maven artifact of javax.xml.bind in buildscript classpath, doesn't solve the problem completely. At runtime, I keep getting the class is not found. Any clue?

Slackbot

09/26/2017, 9:13 AM

This message was deleted.

dragas

09/26/2017, 9:46 AM

Regardless, I'd suggest just talking to the person who's in charge of the API to change how it responds since it's not recommended to have numeric values as property names, if possible.

alexcouch

09/26/2017, 5:56 PM

I'm in a debate with some friends and we are wondering if kotlin/native is going to have GC

raulraja

09/26/2017, 6:08 PM

Can't function references specify type parameters?

mortda-m

09/26/2017, 7:52 PM

@Shawn yes this syntax

raulraja

09/26/2017, 7:56 PM

@mortda-m just because the author wanted to include

in the function name and since that is a reserved keyword for nullable types it needs to wrap it in backticks

👍 1

agomez

09/26/2017, 8:02 PM

<T: IndexedAccess>

sqia09

09/27/2017, 9:10 AM

hey, how can I trim last 4 or 5 characters from string using collection functions?

dave08

09/27/2017, 12:32 PM

Is there a way to destructure a data class's properties into an array?

joelpedraza

09/27/2017, 1:59 PM

final boolean b;
final double d;
{
    final Random rng = new Random();
    final double r = rng.nextDouble();
    if (r < 0.5d) {
        b = false;
        d = r / 2;
    } else {
        b = true;
        d = r * 3;
    }
    // rng and r fall out of scope
}

Is it possible to express this in kotlin? using a run {} "block" is a lambda, and captured value initialization is forbidden.

kristofdho

09/27/2017, 2:00 PM

use tripple backticks

joelpedraza

09/27/2017, 2:24 PM

inline fun <reified T> store(texelCoord: Vec3i, layer: Int, face: Int, level: Int, texel: T) {
       val blockSize = getSize(T::class)
}

Thanks @marstran

kotlin_questions

09/27/2017, 2:42 PM

public static void main(String[] args) { int x = 2; int y = 3; Algo(x, y); } public static void Algo(int x, int y) { int tempX = x; x = y; y = tempX; System.out.printf("x = %d \ny = %d", x, y); }

:stackoverflow: 2

kotlin_questions

09/27/2017, 2:45 PM

Isnt it the same in kotlin?

kotlin_questions

09/27/2017, 2:49 PM

whatever it is for doesn't really matter does it?

😂 1

kotlin_questions

09/27/2017, 2:53 PM

thanks.

😂 1

raulraja

09/27/2017, 8:53 PM

Trying to understand the reason for future reference why

inline

functions marked as

tailrec

can't be recursive in Kotlin. Is that because of fear of inlining too much?. Shouldn't

tailrec

take precedence and what gets inline is just a

while

loop? Thanks!

pakoito

09/27/2017, 10:34 PM

which channel is the right one to ask about the serialization lib, I have a couple of questions

pakoito

09/28/2017, 12:00 AM

is there built-in support for polymorphic arrays, and sealed classes?

dragas

09/28/2017, 10:28 AM

How does kotlin deal with code coverage? Last I checked (about 6 months ago) IntelliJ seemed to return 0% regardless of executed tests.

lex

09/28/2017, 10:49 AM

@dragas do you try jacoco?

joelpedraza

09/28/2017, 3:36 PM

Can this accidental override be resolved (can i tell the compiler it's not an accident)?

09/28/2017, 6:56 PM

which web frameworks have first class kotlin support and good traction for production use?

nerses

09/28/2017, 8:59 PM

i think i’ve found a bug in kotlin converter, Java Code

Collection<Long> values = fetchList();
            Long[] valuesAsArray = new Long[values.size()];
            values.toArray(valuesAsArray);

Kotlin conversion

val values = fetchList()
            val valuesAsArray = arrayOfNulls<Long>(values.size)
            values.toTypedArray()

and all elements in valuesAsArray will be null

snowe

09/28/2017, 10:52 PM

any way to give

Pair

a different name for

first

and

second

when json serializing?

🇳🇴 2

gildor

09/29/2017, 8:44 AM

class test {
private var projID: String? = null
  fun main() {
  projID = intent.getStringExtra(getString("test")).also { projID -> 
       if (projID != null) {
          val proj = Proj(projID)
      } else {
          // todo
      }
   }
  }
}

Title

gildor

09/29/2017, 8:44 AM

class test {
private var projID: String? = null
  fun main() {
  projID = intent.getStringExtra(getString("test")).also { projID -> 
       if (projID != null) {
          val proj = Proj(projID)
      } else {
          // todo
      }
   }
  }
}

Czar

09/29/2017, 8:46 AM

fun main() {
    val proj = intent.getStringExtra(getString("test"))?.let { projId = it; Proj(it) } ?: //todo
}

gildor

09/29/2017, 8:46 AM

yes, it’ also depends what is

todo

View count: 2