Any good GUIs for embedded development @mglolenstine wrote: I’ve tried working with Kotlin/JVM with TornadoFX, but it’s startup time is about 15s, so I’d rather avoid that, as I’m working on an embedded platform. Is there any GUI libraries, cinterop would work, that I could use for a commercial app for free? Kind regards, mglolenstine Posts: 1 Participants: 1 <a...

Connect Kotlin to mysql server on localhost @tkmazibuko.mazibuko wrote: I have tired using different methods of connecting my android App written in Kotlin to a localhost of mysql server but it’s not working…any suggestions? Posts: 1 Participants: 1 Read full topic

[Tool] Kotin React Prop and State Delegates @Jolanrensen wrote: Hi everyone, While working on a React Kotlin/JS project I felt the need to not have to type setState{ } and props.item everytime I needed a variable from the props or state. I also didn’t feel like creating two props for just one item because a child needed a getter and a setter function. After a lot a trying I created StateDelegate, StateAsProp, ReadWritePropDelegate and...

Property delegate class idea @dominicJ wrote: Sometimes I happen to define a class / object that is only used to store delegated properties in such manner (simplified): class LazyStuff { val someNum by lazy { 42 } val someString by lazy { "Hello" } val someImage by lazy { BufferedImage(4096, 4096, TYPE_INT_ARGB) } val someData by lazy { (0..999999).map { it*it } } } These tend to be really large, and very repetitive. I was...

React in Kotlin/JS, What I learned (long but useful read) @Jolanrensen wrote: Hi everyone! Note: Hopefully I can post my entire project later, but as it’s a university project it would be considered fraud to publish it . Why React? Recently for University, we had to make a visualization tool for a dataset of our choosing. One of the recommendations was to use d3.js, because of the diversity in graphs. Now I don’t like JavaScript; it’s very unpredictable unless...

Unable to compile my android project @bimurat.mukhtar wrote: Already tried with stacktrace, info, debug modes, updating gradle plugin version (that matches to android studio bundled plugin ), clearing...

[kotlin/intellij] Add https://github.com/mipt-npm/kmath - how? @franz.geiger wrote: I’m taking the first steps to move my project from Python to Kotlin. Besides the new language I have to cope with a new IDE. I’d like to add KMath to my project to be able to do linear algebra. I found it on https://github.com/mipt-npm/kmath and wonder how I could add it to my project. The project for now is a...

Merging val &amp; var @knyttli wrote: Currently the writer must decide whether to use val or var within its code and then IDE warns them if val may be used instead of var or if var needs to be used instead of val. I think we could merge val and var into single var and let this IDE feature be shifted towards compiler so compiler decides whether val or var is necessary. Is there any specific reason why not? This would prevent...

White space causing compiler error @mantono wrote: I have a problem where a piece of code, which was copied from Slack (this seems to be the source of the error) into an existing Kotlin file, made the code unable to compile. At first it was just a matter of a missing import, but even after that had been taken care of, it still failed with (22, 1): Expecting a top level declaration After removing some blank lines, and some line feeds and...

Why is this reified-T related method failing to compile? @stenlee wrote: Consider the following attempt to produce a forEach() method that recursively traverses the given View hierarchy and consume-s all View(s) of the specified type T: private inline fun forEach(view: View, noinline consume: (T) -> Unit) { forEachEx(T::class.java, view, consume) } private fun forEachEx(c: Class, view: View, consume: (T) -> Unit) { if...

Inline modifier and reified @giobalda93 wrote: Hi! This is my first topic so thanks for having accepted me. Studying Kotlin I wondered why a type reification requires an inlined function. I’ve searched everywhere online but no one has explained this clearly so I am not able to understand. Why the compiler is not able to reify a type parameter without inlining the function first? Could you help me please? Thank you in advance Giorgio...

Kotlin compilation error: KotlinFrontEndException @parkwooyoung81 wrote: I Want to compile Github code (https://github.com/bcgit/bc-kotlin) I use mac with adoptopenjdk8 and intellij I download the code and try to compile it, it will not compile. InformationKotlin kotlinc-jvm 1.3.61 (JRE 1.8.0_242-b08) : org.jetbrains.kotlin.util.KotlinFrontEndException: Exception while analyzing...

Hands-on "Introduction to Coroutines and Channels" @silvaraulenriquecjm wrote: Hello. Where do I find the solution for the following problem ?: In the Hands-on example “Introduction to Coroutines and Channels” the following error occurs when trying to import gladle project: FAILURE: Build failed with an exception. Where: Build file ‘D:\Kotlin\intro-coroutines\build.gradle’ line: 2 What went wrong: Plugin [id: ‘org.jetbrains.kotlin.jvm’, version:...

Kapt gradle debugging annotation processur @walker622 wrote: Hello. I have a problem with debugging an annotation processor. I googled a lot about “How to debug kapt” etc and only this topic with his last comment helped to enable my debug breakpoints. My problem is that I have to reconnect my remote debugger each time when the gradle stops. The first time he stops when...

Importing headers files for iOS @Gabriel wrote: So, I am working on a kotlin multiplatform project and I need to use some headers files for iOS part. I have searched a bit and I didn’t find an explanation in how to use it. How do I configure the gradle? Is it easier to use cocoapod instead if h files? Thank you for your attention Posts: 1 Participants: 1 <a...

Avoid passing Generic and KClass of same Class when inheriting @Merthan wrote: The Goal: Have a basic Android class that takes away the need to do common stuff in subclasses. The Result: It works, but you have to inherit it like this: class HomeFragment : ViewModelFragment(R.layout.fragment_home,HomeViewModel::class) Is there a way to avoid passing the ViewModel once as a Generic parameter and once as a class? The Generic is needed so var viewModel has access to specific...

What is the best way to write if null then initialize it? @sandeep549 wrote: What is the best way to write below code in Kotlin. I’m not looking to write any extra function to make it more smart. Looking if Kotlin has some smart way to write it. … if(list == null){ list = ArrayList() } … Posts: 1 Participants: 1 <a...

Publish multiplatform library "Path is already exist in JCenter. POM project file is not valid." @oleks.albul wrote: I’m trying to publish mpp library with bintray. I did similar steps like I usualy do with android library. What I done: Created new package in bintray. Build project, and have done bintrayUpload. My gradle bintray script: apply plugin: 'com.jfrog.bintray' group = publishedGroupId version = libraryVersion Properties properties = new Properties()...

Error:(10,12) kotlin: Unresolved reference: mozilla @vaclav.schmuttermeier.1 wrote: Hello, I have tried to add external jar library to my project. I have created lib directory next to src directory. Copy the lib there and compile the whole project. In the code it seems compiler can see methods, classes all just fine. But when I want to build the final jar it fails: Error:(10,12) kotlin: Unresolved reference: mozilla Error:(184,24) kotlin:...

Reference nested class-constructor @tieskedh wrote: What is the way to reference a nested classes constructor-param: class SomeClass { class State(val value: String) } class OtherClass{ class State(val value: String) } fun t() { //doesn't work "".let(::SomeClass.State) "".let(::OtherClass.State) } importing State from both of the classes under a different alias and calling without the outerclasses does work, but I was...

Default value for undefined case @Void wrote: For enums it’s common to have default/undefined value like: data class User(val gender: Gender = Gender.Undefined) And then it’s clear for a developer that enum has list of options and there is Undefined one: if(user.gender == Gender.Undefined) doIfUndefined() else doIfDefined() But for classes like Date it doesn’t work because there is no any hint for a developer that there is undefined case. It is...

Generating iOS multiplatform framework code @tyczj359 wrote: I am trying out kotlin multiplatform for the first time and built the common code, tested it in android and it works fine. Now I want to try it in iOS but I am not sure how to build the framework. In the build.gradle file there is already a task to what looks like builds the framework for iOS that intellij built // This task attaches native framework built from ios module to Xcode project //...

Removing Constructor Keyword @sagarpatel288 wrote: I am learning kotlin and when I don’t understand many things, first I Google! However, even after that if I don’t understand, I post my concern here! I hope, I am not disturbing anyone! So, I was reading about the constructor keyword in kotlin and there is one confusion. According to document: <a href="https://kotlinlang.org/docs/reference/classes.html" class="onebox" target="_blank"...

Suggestion for Kotlin Numpy Operator Syntax @giathuan.lg wrote: Hi, I don’t think that I can influence Jetbrains design team, but I will say my suggestion anyway before it is too late. For Kotlin Numpy elementwise operators, isn’t it better to use Matlab-like syntax? For mulitplication, I think “.*” for elementwise and " * " for matrix product would look a lot clearer compared to the magical “@”. Or “.**” or “.^” would look better than “**” and...

SingletonList/SingletonMap - common Kotlin @tieskedh wrote: Just out of curiosity: Java does provide a listOf()/mapOf() with 1 argument to create the SingletonList/SingletonMap. Is there a specific reason why common-Kotlin doesn’t provide this optimization? Or is this just an oversight/skippd for the moment to safe some time? Posts: 1 Participants: 1 <a...

How to publish correctly JS externals @lamba92 wrote: I am trying to test the JS part of my FirebaseMultiplatform library. But when using it inside a Kotlin/JS project the webpack errors with: ERROR in D:/Progetti/Android-Application/build/js/packages_imported/firebase-multiplatform-auth/0.1.8/firebase-multiplatform-auth.js Module not found: Error: Can't resolve...

ClassCastException on inline class @fvasco wrote: I got an error on this code fun main() { println(N(2) in minOf(N(0), N(1))..N(3)) } inline class N(val v: Int) : Comparable { override fun compareTo(other: N) = v.compareTo(other.v) } Exception in thread "main" java.lang.ClassCastException: N cannot be cast to java.lang.Integer <a...

JS / DOM : addEventListener / removeEventListener @Harald.Luebeck wrote: If I add an EventListener to a DOM Element I am not able to remove this Listener. class A { private fun myListener( event:Event ) { } fun xyz(element:Element) { // adds resize Event Listener to DOM Element element element.addEventListener(“resize”,{ myListener(it) }) // the remove does not work :-( element.removeEventListener("resize",{ myListener(it) }) } } the way how to add...

The Mybatis-Generator's Example about convert java to kotlin code @aimatwinning wrote: code.zip (6.3 KB) Please check the two code files in code.zip. This is the example file generated by mybatis generator. When the file is converted to Java code, the compiler fails to compile. Kotlin developers can improve the intelligence of “java code conversion to kotlin...

Embryonic newbie here @cellurl3 wrote: <a class="lightbox" href="https://aws1.discourse-cdn.com/business5/uploads/kotlinlang/original/2X/3/33fa0bb34acf059252c1185b0122449cfb8c4839.png" data-download-href="/uploads/short-url/7pO4qD8HwSpYft9GV7aH4rrDtd7.png?dl=1" title="Untitled" rel="nofollow noopener"> Untitled1920×1080 215 KB</a> which area do i start at 1,2,3? This is github fork <a...