Is Kotlin good as my first "real" Language? @noppp wrote: Hey there Kotliners(?), I tried Powershell, because i am an admin, and went through a few ruby/python/f# tutorials, because my school told me so But now I want to learn a language capable of creating client applications, web applications and mobile apps, besides being geared up for the backend part. I think Kotlin can all do this. So my question is: Is Kotlin any good as a first programming language...

Kotlin conf in asia for Kotlin? @vnkotlin wrote: Hi, My name is Kevin from Kotlin Vietnam (https://vnkotlin.com). After KotlinConf, I just want to know we have any event like KotlinConf in asia ? My second question is how do we call whom interested and used Kotlin every day ? Kotlinese ? Kotlinner or else ? Posts: 1 Participants: 1...

Build native app using NDK @hasan.oryx wrote: Is there a way to build the Kotlin-nativet app using ndk-build Posts: 1 Participants: 1 Read full topic

I am logged in as a random user @crikot wrote: When I press the login button in this forum, the page will immediately log me in without me entering any credentials. What’s more, the user it logs me in as (crikot), is unknown to me. I am not crikot. I would like to be able to login with my own user account. Please help. Posts: 1 Participants: 1 <a...

Sample in "delay" not work @Helixcs wrote: I run sample code in “https://kotlinlang.org/docs/reference/coroutines/basics.html” , but not work . And error tip shows "Suspend function ‘delay’ should be called only from a coroutine or another suspend function“ in IDEA. Posts: 1 Participants: 1...

What solution for this proplem @samabc1co wrote: <a class="lightbox" href="https://discourse-cdn-sjc1.com/business5/uploads/kotlinlang/original/2X/1/19115b93512d1f24fb0beeac6e26347f10cf0a3d.jpeg" data-download-href="https://discourse-cdn-sjc1.com/business5/uploads/kotlinlang/19115b93512d1f24fb0beeac6e26347f10cf0a3d" title="stop.jpg" rel="nofollow noopener"> stop.jpg1366x768 84.5 KB </a> <a class="lightbox"...

Why is Kotlin Native much slower than JVM? @tommot1985 wrote: Hi there, i have created a simple program to generate pairs of twin primes (that means that the second prime is the first prime + 2, eg. 3 and 5 or 5 and 7. class Primes : Sequence { var next: Sequence = generateSequence(3L) { it + 2L } override operator fun iterator() = object : Iterator { override fun hasNext() = true override fun next(): Long { val head = next.first()...

Deploy JavaScript Binding to Maven @nimloth05 wrote: I’ve create a ThreeJs binding and I like to upload this binding to maven central, but I have no idea how to do this is there a guide somewhere explaining the steps? I’m not asking for general “how to deploy to maven”-guide but specifically how to deploy kotlin code which can be used by other kotlin javascript projects. Posts: 1 Participants: 1...

Why are Function parameters not `crossinline` by default? @SOF3 wrote: When a developer designs an inline function, it might not be so likely that he expects (or even remembers that it is possible) callers to have beyond-inline-scope control flow inside the inline function. Breaking control flow from inside the inline function is likely to cause instability. Although inline functions should only be used for very small functions that only access the public API of any other...

There should be other ways to tell compiler about nullability @callidus.lynx wrote: It is pretty handy that the compiler automatically detects null-Checks like these val x : String? = getX() if(x == null) return x.trim() //

Kotlin Training and Career @deviprasanthi wrote: Hello, I’m a newbie joined to participate in the discussions and acquire some knowledge regarding the topics under discussion. I’d like to have some of your views regarding “learning Kotlin through online”. Any suggestions are highly appreciable. Thanks and Regards, Prasanthi Posts: 1 Participants: 1 <a...

My Kotlin project in IntelliJ has broken @Riz wrote: Hi I’ve been programming in Kotlin but today I opened my project and tried to run a main function but now it starts spewing a bunch of errors: <a class="lightbox" href=""...

How to pronounce nullable types? @Kotlinius wrote: How should we pronounce the nullable types when talking about code? I think what most use is the format “nullable Int”, but have also heard “int questionmark”. Both of these are quite long, so why not make a standard, shorter way of pronouncing these types. My suggestion is “Int-ish” Maybe sounds a bit weird, but I think this is better than saying “nullable” or...

Can't transform with ts2kt @dazraf wrote: Attempting to transform: https://facebook.github.io/immutable-js/ Here’s my command line: ts2kt -d src/main/kotlin/types/immutable node_modules/immutable/dist/immutable.d.ts Output: ts2kt version: 0.1.3 Converting node_modules/immutable/dist/immutable.d.ts ts2kt: "ComputedPropertyName" kind unsupported yet here!...

dropAt for List @tylerwbrown wrote: Thoughts on a function dropAt for type List that mimics removeAt for mutableLists? i.e it doesn’t modify the original list (as drops don’t), but it returns a List where the item at that index is removed. Usage: val names = "One Two Three Four".split(" ") val newNames = names.dropAt(0) names.forEach { print("$it ") } // => One Two Three Four newNames.forEach { print("$it ") } // =>...

Newbie Introduction @prasanthikorada wrote: Hello, Myself Prasanthi. I’m glad being a part of this forum. I am interested in technologies and its upcoming, looking forward to gaining more knowledge through this forum and share my views in discussions. Thank you. Posts: 1 Participants: 1 Read full topic

use different Locale in kotlin @aligassan wrote: l want to add language to my app use string , lang English and Arabic . my app is flight schedule for specific airport via data json. and my app working fine with out problem . l want change the language are come from data json to Arabic language String res in en schedule arrival departed cancelled String res in arabic مجدولة وصلت غادرت...

Finding the right way to use Kotlin 1.3 Coroutines @Tim_van_der_Leeuw.1 wrote: I’m trying to figure out the right way to use Kotlin coroutines in Kotlin 1.3 and it seems there are a lot of ways to do it wrong, even when it all “seems to work”. I learned today that I have to write my suspending functions like this: suspend fun get(id: Long): KalahGame = coroutineScope { val game = async { // ... Do things } game.await() }...

Android Studio adds non-null assert call incorrectly for maps @vhodek wrote: Having something like: data class Article(...) data class Blog( val articles: Map ) private lateinit var blog: Blog // ... loading Blog from JSON fun getArticle(id: String): Article { return blog.articles[id] } IDE reports correctly that I can’t return blog.articles[id] since it can be null and I specified return type as non-null and suggests a) to change the return type to Article?...

Is it possible to translate Kotlin to Java without Kotlin libraries? @lightsing wrote: Is it possible to translate Kotlin to Java without Kotlin libraries? Some environments can only run standard Java files (some acm online judgments for example). Is it possible using Kotlin in this kind case? I tried using decompile Kotlin byte code, but most cases it imports Kotlin’s libraries (import kotlin.collections.CollectionsKt; for example). Can it be translated to pure Java?...

Convert kotlin 1.2 to 1.3 @Riz wrote: When I opened intelliJ after updating the kotlin plugin it asked me if I wanted to convert my 1.2 code to the 1.3 I clicked it away accidentally but I do want it to convert how do I re-open this window? Posts: 1 Participants: 1 Read full topic

TreeMap in Common library @lamba92 wrote: I am building a multi-platform library for graphs and I’d really need a TreeMap to sort the frontier. I was trying to rewrite it as is in java.utils but its implementation is so rooted in the JDK that is insane (if not illegal) to translate all the files required from Java to Kotlin just for the class I need. I never...

Tagging conventions for Kotlin questions on Stack Overflow @reitzig.1 wrote: In <a>a question</a> I asked recently on Stack Overflow, an interesting point came up: how do we best indicate which target platform a Kotlin question is about? Arguably, Stack Overflow is the single most important resource for getting help with programming issues today. Kotlin is represented by a <a href="https://insights.stackoverflow.com/trends?tags=kotlin" rel="nofollow noopener">growing...

I upgraded to Kotlin 1.3 but now my Unit Tests don't work anymore (Unresolved Reference) @Riz wrote: I tried: Why org.testng becomes Unresolvable reference in kotlin tests? doesn’t solve the issue. I upgraded to Kotlin 1.3, ran code migration tool but now it’s giving me these errors, any idea what’s causing it? When I delete the tests from my project it compiles normally, so the...

Using 'withContext' to implement an Actor? @bbaldino wrote: I’ve got a class which is accessed via multiple contexts, and rather than having to lock the shared data I’d like to serialize all the processing onto a single thread. I don’t really like the overhead of having to map methods to messages like in an actor, though, so I tried doing something like this: import kotlinx.coroutines.* import java.lang.Thread.sleep import...

Import the html document to android views @samson.ayalew.et wrote: Hey There, In the project that i am currently working i wanted to import the html document to android view as it is(including text format and images). How can i do that? Posts: 1 Participants: 1 Read full topic

Posix on Android @matsomatic wrote: Hi I’m new to Kotlin Native so please excuse any beginners mistakes. I have tried looking around in the discussions and documentation but can’t find an answer to my question. Please feel free to direct me to an already existing answer if there is one. I’m investigating Kotlin Native as a possible platform for writing the majority of the data and logic layers for an app intended for...

Kotlin Js(via multi platform) and console.log @huggy wrote: <a class="lightbox" href="https://discourse-cdn-sjc1.com/business5/uploads/kotlinlang/original/2X/9/961bffefc3b296c5e980e45aea4237259868b546.png" data-download-href="https://discourse-cdn-sjc1.com/business5/uploads/kotlinlang/961bffefc3b296c5e980e45aea4237259868b546" title="Blender Blog 2018-11-14 14-30-11.png" rel="nofollow noopener"> Blender Blog 2018-11-14 14-30-11.png1164x198 34.3 KB </a> import...

Upgrade to Kotlin 1.3.10 - Gradle plugin exception? @pgmjsd wrote: I’ve just tried upgrading a Kotlin JVM project from 1.2.71 to 1.3.10, and now my gradle build fails while compiling Kotlin classes with the following exceptoin: java.lang.Exception: tried to access method kotlin.collections.ArraysKt___ArraysJvmKt.copyOfRange([Ljava/lang/Object;II)[Ljava/lang/Object; from class kotlin.reflect.jvm.internal.calls.CallerImpl$Method$Instance at...

Using coroutines scoped to ViewModel for IO @andreartus wrote: So far as I can make out the following is a very common pattern for enabling coroutines in Android ViewModels. class CoroutineScopedViewModel : ViewModel(), CoroutineScope { private val _job = Job() override val coroutineContext: CoroutineContext get() = Dispatchers.Main + _job override fun onCleared() { super.onCleared() _job.cancel() } fun...