kotlinlang #announcements

is there any way i can get a bunch of photos of the kotlin branding? im creating a presentation for my school and i want high quality pictures for my presentations 🙂

vaskir

09/22/2018, 6:21 AM

What I'm missing here?

vaskir

09/22/2018, 8:58 AM

/** .. */

the only doc comments style available? It's too verbose for single-line comments, see for example https://github.com/google/iosched/blob/master/model/src/main/java/com/google/samples/apps/iosched/model/Session.kt

Slackbot

09/22/2018, 6:06 PM

This message was deleted.

🚓 1

👮‍♂️ 1

muralimohan962

09/22/2018, 6:20 PM

I am able to access private property when the object is sent as parameter to its functions.

mantono

09/22/2018, 7:59 PM

Yes, it is supposed to work, it just does not work in 1.3.0-rc-57 it seems.

redrield

09/23/2018, 10:21 PM

Could someone elaborate on where/when I should be using Sequence<*> vs Collection<*>? IntelliJ has started giving me lints recommending that a call chain should use Sequence, but I'm still confused as to when I should use that. I know that Sequences are lazy and Collections are eager, but I'm not sure when to use either

redrield

09/23/2018, 10:21 PM

Here's some code that IntelliJ recommended I used Sequence with (hence the asSequence and toList)

task.command.requiredSubsystems.asSequence().filter { msg.shouldStartDefault(it) }
                    .mapNotNull(Subsystem::defaultCommand).toList()
                    .forEach {
                        handle(Message.Start(it))
                    }

nwh

09/24/2018, 2:17 AM

Are there any academic papers on the concept of suspension/continuation style programming versus classic threading?

Ramin

09/24/2018, 8:40 AM

if it's possible try to make slide screen in a bigger size we don't need to see the guy who make speech all the time. in kotlinconf 2017 I have problem with slide size 🙂

ribesg

09/24/2018, 12:11 PM

equals

implemented for an inline class, or do I have to do it? It seems obvious to me that it should be implemented, as easy as it is, but I would like to be sure

elect

09/24/2018, 12:14 PM

so, I got a

Vec3

class where I retrieve components as

override var x: Float
        get() = array[ofs]
        set(value) = array.set(ofs, value)

Why from java

getX()

returns

Float

instead

float

paulex

09/24/2018, 1:06 PM

Please, i'd like to build a small application(using kotlin) that can be installed into a device that is movable. Would also like that i can maybe connect to the device via a console to configure certain things. The device should also be able to broadcast hotspot etc... Where can i start from or what can i read more about this.

razvandragut

09/24/2018, 5:19 PM

cool, will post it in IntelliJ channel

Andreas Sinz

09/24/2018, 8:32 PM

class Person private constructor(val name: String, val age: Int) : Individual { 
    //stuff 
}

fun Person(name: String, age: Int): Person {
    require(age >= 18)

    return Person(name, age)
}

Shawn

09/24/2018, 10:00 PM

myMap.getOrPut(key) { arrayListOf() }.add(i)

👏 3

Nikky

09/24/2018, 10:24 PM

can i add custom getters to var/val in the main constructor of a data class ?

avolkmann

09/25/2018, 1:48 AM

Anyone else having problems after upgrading to 1.2.7x ?

karelpeeters

09/25/2018, 8:15 AM

What do you want to happen? An error? Note that

typealias

and

import

are very different,

typealias

is only about the type,

import

is the actual class but the classname can also happen to represent the type.

Onur

09/25/2018, 11:00 AM

Why do I get different results (

originalContent2

contains 1 extra space after “ipsum” while

originalContent

does not)?

apatrida

09/25/2018, 11:06 AM

What is

kotless

? https://plugins.jetbrains.com/plugin/10886-kotless-plugin @Andrey Tarasenko @brk @guredd @tanvd

👀 1

karelpeeters

09/25/2018, 12:21 PM

@apatrida It's probably just a bit of wordplay, Kotlin + serverless.

👍 1

karelpeeters

09/25/2018, 12:52 PM

Child<String>

is not in general a subtype of

Parent<Any>

, go trough this page: https://kotlinlang.org/docs/reference/generics.html

Ruckus

09/25/2018, 7:26 PM

map[key] = map.getOrDefault(key, 0) + 1

09/25/2018, 7:29 PM

map.compute(key) { k, v -> (v ?: 0) + 1 }

Casey Brooks

09/25/2018, 7:30 PM

map[key] = (map[key]?:0) + 1

jdemeulenaere

09/25/2018, 8:40 PM

Anyone working on a Kotlin multiplatform support for gRPC? i.e. generating multiplatform client (& server, although less useful) code that can be used in common projects ? It'd be a super nice way to easily make RPC & streaming in a Kotlin MultiPlatform project, in addition to the recent HttpClient from ktor 🙂

👍 1

ribesg

09/26/2018, 8:10 AM

The new

when

thing in

1.3 RC

is reformatted incorrectly by IDEA:

val value = when (val type = peek()) {
                    JsonToken.BOOLEAN -> nextBoolean()
                    JsonToken.NULL -> nextNull().let { null }
                    else -> throw Error("Unexpected type $type")
                }

After auto-formatting:

val value = when (
                    val type = peek()) {
                    JsonToken.BOOLEAN -> nextBoolean()
                    JsonToken.NULL -> nextNull().let { null }
                    else -> throw Error("Unexpected type $type")
                }

There is no matching option under the

when

close in

Code Style

. Is this a bug / missing feature? It happens with both the old default IDEA style and the new one.

😱 2

Slackbot

09/26/2018, 10:49 AM

This message was deleted.

Ruckus

09/26/2018, 6:33 PM

Quick question: why do we need to specify which types are reified in an inline function? As it's inlined, aren't all types basically automatically reified?

Title

Ruckus

09/26/2018, 6:33 PM

Quick question: why do we need to specify which types are reified in an inline function? As it's inlined, aren't all types basically automatically reified?

Sam

09/26/2018, 11:41 PM

Here the Person object is kept track in a generic Java Object type

data class Person( val age : Int )

fun main(args: Array<String>) {
    "sample".printParameters( "string", Person(22 ) )
}

private inline fun <reified T, R> String.printParameters( value1 : T, value2 : R ) {
    println( "$this $value1 $value2" )

    when( this ) {
        is T -> println( "Object is of type ${T::class.java}" )
        else -> println( "Unknown type")
    }
}

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