Kotlin 1.5.30 Is Now Available!

Removing barriers between ideas and working code Get a glimpse into the future of Kotlin and how Kotlin removes barriers between ideas and working code. You will hear updates from the Kotlin team and news about the whole Kotlin ecosystem.  Save the date Agenda: KeynoteKotlin & WebAssembly: A First LookKMM Beta RoadmapWhat's new in Ktor 2.0Spring Native with KotlinK2 Compil

Grouping and counting the characters in strings and collections is a very typical task given in coding interviews. Usually, the solutions for such tasks are quite simple. In this blog post, we learn about a few useful functions in Kotlin that make set operations really simple. The task: custom customs The task for the Advent of Code Day 6 challenge requires us to count the answers on cus

In various presentations and keynotes, we’ve told you about how the number of Kotlin developers has changed. We’ve finally decided to explain how we calculate these figures. But first, let’s start with some terminology, so it is clear who we are talking about: Developers – everybody who used Kotlin at least once within a given period.Active developers – developers who edited Kotlin code in b

Let’s continue our journey of understanding what “idiomatic Kotlin” means and solve one more puzzle from the Advent of Code challenge. The puzzles are independent of each other, so you don’t need to check any of the previous ones we’ve already covered. Simply read through the following solution or watch the video. We hope you learn something new! (more…)

Kotlin was designed to be very similar to Java to make migration as smooth as possible. However, Kotlin was also designed to improve the developers' experience by providing a more expressive syntax and a more sophisticated type system. To take full advantage of the language and write more concise code, learning Kotlin idioms is a must. Without them, it is easy to fall back into old Java patterns.

Announcing a new series of webinars about Kotlin for server-side! These will take place between May 27 and June 17. Join the live sessions or watch the recordings later! In this five-webinar series, our speakers will host step-by-step live coding sessions to show you what kinds of benefits you can get from Kotlin for server-side and its rich ecosystem. Each webinar will include a Q&A sessio

We continue our series of Kotlin for server-side webinars. Between February 18 and March 18 we will host 4 webinars to explore applied software development with Kotlin on server-side through live-coding sessions. Speakers from JetBrains, VMware, Confluent, and Oracle will cover reactive programming, asynchronous applications with the Ktor framework, building microservices with Helidon, and other a

Like most startups, at the beginning of its journey Faire was looking for an efficient solution to base its tech stack on. Here is their story of starting with Java and migrating to Kotlin in a year.

Kotlin Multiplatform Mobile plugin for AppCode helps you develop applications for Android and iOS using the unified Gradle project model and provides cross-language code assistance. CocoaPods integration now works with the latest plugin version available in our plugin repository. Just add a Pod dependency to your shared module, sync the Gradle project, import the required module in your Swift or O

One of the main benefits of Kotlin Multiplatform Mobile is its flexibility. You can use KMM in your existing or new projects, share different parts of your apps, and integrate with different UI frameworks. To find the best way to apply this flexibility in your project and maximize the benefits of using KMM, it can really help to look at how other projects have used it. Today we’ll look at the KMM

Hi everyone, We recently announced a new plugin for Kotlin Multiplatform Mobile development that helps you develop applications for Android and iOS using the unified Gradle project model and provides cross-language code assistance. Currently, this plugin is available only for AppCode, a paid IDE. We’ve decided to provide a way to try this plugin for free: just fill out this form to get four free

If you use Kotlin Multiplatform Mobile (KMM) for sharing code between iOS and Android, you will at some point have to decide how you will deliver the shared module to your platform projects. While Android integration is smooth out of the box, iOS integration can require some additional setup. In this post, you will learn how to use the latest Kotlin features to easily connect the KMM module to you

KotlinDL 0.2 is available now on Maven Central with a variety of new features. New layers, a special Kotlin-idiomatic DSL for image preprocessing, a few types of Datasets, a great Model Zoo with support for the ResNet and MobileNet model families, and many more changes are now receiving a final polish.

This update of the Kotlin kernel for Jupyter Notebook primarily targets library authors and enables them to easily integrate Kotlin libraries with Jupyter notebooks. It also includes an upgrade of the Kotlin compiler to version 1.5.0, as well as bug fixes and performance improvements. pip installConda install The old way to add library integrations As you may know, it was already possible to inte

We have released Preview 2 of Kotlin for Apache Spark. First of all, we’d like to thank the community for providing us with all their feedback and even some pull requests! Now let’s take a look at what we have implemented since Preview 1? Scala 2.11 and Spark 2.4.1+ support The main change in this preview is the introduction of Spark 2.4 and Scala 2.11 support. This means that you can now run jobs

You can understand a lot about data from metrics, checks, and basic statistics. However, as humans, we grasp trends and patterns way quicker when we see them with our own eyes. If there was ever a moment you wished you could easily and quickly visualize your data, and you were not sure how to do it in Kotlin, this post is for you! Today I’d like to talk to you about Lets-Plot for Kotlin, an open-

Kotlin Coroutines 1.5.0 delivers GlobalScope that is now marked as a delicate API, extensions for JUnit, the refined Channel API, and stabilized reactive integrations.

Today we’re exploring kotlinx-datetime 0.2.0 — a new version of the Kotlin library for working with dates and times.

kotlinx.serialization 1.2 is out! The latest version of our multiplatform serialization library brings a number of improvements – here are the highlights: JSON serialization is faster than ever before. Version 1.2 is up to twice as fast as previous versions when parsing JSON into type-safe Kotlin objects and turning Kotlin objects into their text representations. Kotlin 1.5 type system additi

Introducing viktor viktor is an open-source Kotlin library developed by JetBrains Research that aims to make array calculations more efficient. We achieve this by avoiding nested arrays, delegating expensive operations to JNI + SIMD, and providing built-in support for arithmetics on logarithmically-stored numbers. This post is in celebration of the 1.1.0 release. We will discuss what the library d