Newsletter

On July 19, 2011, at the JVM Language Summit, JetBrains announced Kotlin – a new statically typed programming language for the JVM. So, it has been here for almost 10 years. Ever since its conception in 2011, it’s been changing the way we work at JetBrains and beyond. None of the strides we’ve taken would have been possible without the Kotlin community. So, let's get nostalgic! We’d love to hea

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

Take part in the Kotlin event and send in your questions for the Kotlin team! May 25, 2021

Kotlin has always been and continues to be a modern language in the industry, addressing the real needs of real developers. It is increasingly being adopted in many trending fields, including mobile, web, server-side and cloud development, data science, and education. This all gives a strong indication that there is already significant demand for Kotlin developers and there will continue to be in

The “Kotlin New Users Survey” will help us understand the ways people are introduced to Kotlin, and what is important to them during the first steps of their journey. We want the experience in the early stages to be a good one for the adopters. Getting feedback from the community is useful for us to improve our materials and identify where exactly beginners expect these materials to be. If you’ve

Nabil Hachicha, Android Engineer, from MongoDB Realm shares their story of creating a pure Kotlin-first SDK for use by developers. Realm is an open-source, easy-to-use local database that helps mobile developers to build better apps faster. It launched 8 years ago with the release of the Realm Java SDK, and since then we've worked to make sure our API is always improving to reflect what mobile de

Stack Overflow is an essential resource when it comes to learning something new about programming. It is easily searchable, used by millions of people, and extremely popular in the software engineering community. During the Kotlin Census 2020, 55% of respondents mentioned Stack Overflow as a helpful learning resource. However, sometimes we hear that finding Kotlin-related information on Stack Over

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

There are several options to run Kotlin interactively: kotlinc and Kotlin REPL (read-evaluate-print loop) in IntelliJ IDEA. Neither is ideal. kotlinc does not have autocomplete or syntax highlighting. Kotlin REPL is very powerful, but it forces you to open IntelliJ IDEA, which is not always convenient. Allow me to introduce you to ki, a Kotlin Interactive Shell, and describe its benefits below. An

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

Alec Strong from Cash App shares their story of adopting KMM and benefiting from shared code across their mobile platforms. Cash App is the easiest way to send money, spend money, save money, and buy cryptocurrency. We believe in providing everyone with access to important financial services so they can fully participate in the economy. The app launched in 2013 as a simple peer-to-peer payment app

Leroy Merlin helps people all around the world improve their living environment and lifestyle by helping them design the homes of their dreams and make them a reality. The Leroy Merlin mobile app helps customers search for products, shop online and find their nearest store. The Russian branch of Leroy Merlin has stores in 64 cities, and 1.5 million people use the mobile app monthly. Visit the Ko

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

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

Down Dog is the innovative start up that brings a studio-like yoga experience to your mobile device. With Down Dog you get a brand new yoga routine every time you come to your mat. Unlike following pre-recorded videos, Down Dog won’t make you do the same workout over and over again. With over 60,000 different configurations, Down Dog gives you the power to build a yoga practice you love! This app

We’re planning to add new language features in Kotlin 1.5, and you can already try them out in Kotlin 1.4.30: Stabilization of inline value classes Experimental support for JVM records Experimental support for sealed interfaces and other improvements for sealed classes To try these new features, you need to specify the 1.5 language version. The new release cadence means that Kotlin 1.5 is

(Updated) The new backend is Stable and is itching to be made the new default. We need each of you to start adopting it, testing it, and giving us feedback so we can give it a final polish, let's look at how you can start using it. What is IR backend? After the compiler frontend is done analyzing the code, the backend generates the executables. We have three backends: Kotlin/JVM, Kotlin/JS, and K

Philips is a leading health technology company focused on improving people's health and well-being, and enabling better outcomes across the health continuum – from healthy living and prevention, to diagnosis, treatment and home care. Philips is pursuing the goal of improving 2.5 billion lives per year by 2030. Philips has a wide range of connected products for smart home care and personal health

The Kotlin team has always relied on feedback from the community for making decisions about the future of the technology. You will always be our go-to people who know best how to make Kotlin even more enjoyable to work with! This past November, we conducted our first-ever Kotlin Multiplatform survey with the goal of understanding how the recent changes in the technology have shaped the ways develo

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.