New video! Solving a Sudoku from scratch using a branch-and-bound algorithm (in Kotlin). This technique extends beyond Sudokus into many useful spaces like scheduling, knapsack optimization, and machine learning.

Thoughts on criticism of Java reflection using JSON parsers as an example. https://medium.com/@martin.devillers/reflections-on-reflection-performance-impact-for-a-json-parser-on-android-d36318c0697c

I gave a talk yesterday on the Kotlin type system at the Kotlin Budapest User Group meetup, and now here it is in article form for everyone: https://www.kotlindevelopment.com/typical-kotlin/

Introducing the Monty Hall problem with a Kotlin Monte Carlo simulation and Bayesian intuition.

Here's a little mind twister for those of you that like puzzles: https://proandroiddev.com/repeating-without-looping-or-recursion-6443e5bf88c7

@vincent.desmet and I just open-sourced how we set up our kotlin project to share code between iOS and Android. It includes publishing your code to Bintray / CocoaPods. If you have any feedback, we're happy to hear 🙂 https://github.com/novemberfiveco/kotlin-mpp-standard

Hi! I published a post how to use Mockk to test Spring Boot controllers without Mockito. https://medium.com/@darych90/kotlin-spring-boot-mockk-6d1c1a6463ac

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Some videos from KotlinConf are now available on youtube:

https://github.com/rozkminiacz/KotlinUnitTesting Hi guys! I just wrote down few samples of popular testing frameworks - and how to use them in Kotlin. In each module you will find parameterized and regular test, and Gradle configuration for specific testing tool.

Hello friends, I'm launching an open-source project that I worked on during KotlinConf! I've written a larger article or why I did this. Basically I got interested in Gradle+Kotlin because was fed up with the black magic in Gradle+Groovy, of not understanding neither how it works or why it doesn't work. Rewriting your entire build to Kotlin can be daunting, but you don't need to do that. I have found out that adding just a bit of Kotlin to your existing build can relieve a lot of that Gradle frustration. And my project

gradle-kotlin-dsl-libs

makes it easy to you have a first taste of Gradle+Kotlin. https://blog.kotlin-academy.com/gradle-kotlin-the-missing-piece-of-the-puzzle-7528a85f0d2c

My Chess Engine made in Kotlin

Hi everyone - I’m excited to share a new, illustrated article about how autoboxing works with Kotlin’s new experimental inline classes feature. Have fun! https://typealias.com/guides/inline-classes-and-autoboxing/

i made a tutorial for people upgrading to kotlin eap and facing the usual gradle problems (do not have medium) so for now just on github with sample code in the repo https://github.com/NikkyAI/PluginManagementTutorial/blob/master/README.md

Are you tired of managing worker threads in Java-Android? Kotlin-Coroutines are here to rescue. Yes! Coroutines are now stable. Compared to all other alternatives like Executor and RxJava, Coroutines are easy to learn and use. To make it super easy, here is my attempt to simplify common terms used in the context of Coroutines. Android Kotlin Coroutines: Basic Terminologies & Usage The common terms used in Coroutines. Knowing these terms in advance will ease your learning process. https://android.jlelse.eu/coroutines-basic-terminologies-and-usage-b4242bd1b2a4

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Hi @elye - overall a good read, but your section “Kotlin made Interface extensible” forgets about the

default

operator in Java which lets you achieve the same thing

Hi all, sorry for the spam 😉 but I'd like to introduce my new lightweight and minimalistic dependency injection framework Katana, written in pure Kotlin and designed with Android in mind. It's lean, fast, doesn't use reflection or code generation and is inspired by Dagger, Koin and Kodein. I believe it fills a niche in the realm of dependency injection libraries and is as good as handwritten DI. Please have a look at https://github.com/rewe-digital-incubator/katana and read https://medium.com/@caffeine81/why-we-need-yet-another-dependency-injection-framework-for-kotlin-android-f8162174ea4 for a bit of background. Please try it out, spread the word and report bugs and feature requests. Also come by #katana if you have questions or feedback. Thank you all for your support ✌️🏼🙂

Mockito Kotlin 2.0 Released https://github.com/nhaarman/mockito-kotlin/releases/tag/2.0.0

I wrote about a lot of the features in Kotlin 1.3. I had a lot of fun figuring out how they work and how to explain them! https://todd.ginsberg.com/post/kotlin-1.3-features/