Kotlin 1.5.20 Released!

More developers are choosing Kotlin every day. It is one of the fastest-growing programming languages according to GitHub, and one of the most in-demand coding languages according to Hired.  As demand for Kotlin developers increases, we are looking to support computer science educators and make Kotlin educational content as widely available as possible.  In this post, we’d like to share

Let’s continue learning how to write idiomatic Kotlin code by solving the Advent of Code tasks! Today, we’re discussing the solution for the day 2 task. (more…)

What’s the best way to learn a language other than writing some code with it? Solving fun and short tasks like the ones from Advent of Code might be a great opportunity to practice your language skills, and you can learn a lot if you compare your solutions with how others have solved the same problem. Lots of developers from around the world, including some from the Kotlin team, take part in th

The Kotlin API for Apache Spark is now widely available. This is the first stable release of the API that we consider to be feature-complete with respect to the user experience and compatibility with core Spark APIs. Get on Maven Central Let’s take a look at the new features this release brings to the API. Typed select and sortMore column functionsMore KeyValueGroupedDataset wrapper funct

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.

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

Hi everyone, Today we’re expanding our Kotlin Multiplatform Mobile ecosystem by introducing the Kotlin Multiplatform Mobile (KMM) plugin for AppCode. By using this plugin you can: Specify the structure of the iOS part of your KMM project in the same way you specify the Android one. We’ve created a special Gradle DSL for describing iOS projects that does not require having .xcodeproj or .xcwor

Since the release of Kotlin Multiplatform Mobile about 9 months ago, more and more developers have decided to give it a try and start to share their code between mobile platforms. Some do this in their free time while working on pet projects. Some integrate KMM into existing apps. And some even base their brand new applications on the KMM technology. The technology is already helping many dev

Kotlin Multiplatform Mobile (KMM), an SDK for cross-platform mobile development, went Alpha in August 2020. Over the past 9 months, the KMM ecosystem has been rapidly evolving: Each new Kotlin version comes with features and improvements that enhance the multiplatform development experience.KMM development tools, such as the KMM Plugin for Android Studio, are constantly receiving updates to mak

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