We’ve opened the Call for Papers for KotlinConf, and we’d love to get your submissions! https://sessionize.com/kotlinconf-2023/

🚀 :kotlin-intensifies-purple: The Kotlin 1.7.20-Beta release is out! • K2 now supports several new plugins • Preview of the

..<

operator for open-ended ranges • K/N memory manager enabled by default • Inline classes with generic underlying type (experimental) Try out the new features and report any issues you find to help us improve Kotlin 1.7.20!

📣 Did you know that by participating in the Early Access Preview and reporting bugs, you contribute to Kotlin and help us to improve it for everyone in the growing Kotlin community? We truly appreciate your help! 💪 If you haven’t been participating in the EAP for the plugin and compiler, please tell us why so that we can improve the EAP process: 1️⃣ Compatibility with some tools and libraries (for example, Jetpack Compose) is an issue. 2️⃣ I don’t know how to participate. 3️⃣ I didn’t know that the EAP had started. 4️⃣ I prefer stable versions. 5️⃣ Other, please specify in the thread :thread-please:

🎉 kotlinx.serialization 1.4.0 is released! Check out the new exciting features and updates: • Integration with Okio’s

BufferedSource

and

BufferedSink

• Inline classes and unsigned numbers no longer require experimental annotations • Part of `SerializationException`’s hierarchy is public now •

@MetaSerializable

annotation • Moving documentation from GitHub pages to

<http://kotlinlang.org|kotlinlang.org>

:kotlinnew: 🎉 Kotlin 1.7.20-RC is out! Try it and share your feedback!

📣:kotlinconf23: The KotlinConf’23 call for speakers is still open. We are looking forward to getting your talk proposals! https://sessionize.com/kotlinconf-2023/

Kotlin 1.7.20 has been released! 🎉 · K2 support for several new plugins · Preview of the ..< operator for open-ended ranges · K/N memory manager enabled by default · Inline classes with generic underlying types (experimental) · Support for Gradle 7.1 Learn more in the blog post and try out the new features!

:kotlinnew:📣 Kotlin Multiplatform Mobile has reached Beta and is on track to becoming Stable! Kotlin Multiplatform Mobile – a technology that allows developers to share the logic of iOS and Android apps, combining the benefits of both cross-platform and native development approaches – is now in Beta! Check out a video from the Kotlin team and some early Multiplatform Mobile adopters, get hands-on experience through a new series of webinars, and start using it today.

New channel (per suggestion by @louiscad) dedicated to #naming things. Why? Because naming is, well, not easy.

:kotlin-intensifies-purple: Kotlin 1.7.21 has arrived with bug fixes 🔧 For IntelliJ IDEA 2022.2, Android Studio Dolphin, Electric Eel, and Flamingo, v1.7.21 of the plugin will be bundled with each IDE’s next update. Check out the latest version and update now ⬇️ https://github.com/JetBrains/kotlin/releases/tag/v1.7.21

:kotlin-intensifies-purple:🎉 Kotlin 1.8.0-Beta brings the following updates*:* ✅ Gradle 7.3 compatibility ✅ Recursive

Path

utility functions in the stdlib ✅ Support for Xcode 14 in Kotlin/Native ✅ Discontinuation of support for the old JVM backend Try it out and share your feedback! 👉 https://kotlinlang.org/docs/whatsnew-eap.html

Why install Beta? ➡️ If you work on a complex multi-module project, it may streamline your experience when you adopt the Stable release version. ➡️ If you’re a library author, working with EAP versions allows you to support the latest Kotlin versions in your library almost immediately with the Stable release, which makes your users happier and your library more popular. ➡️ If you’re a Kotlin enthusiast and enjoy contributing to the Kotlin ecosystem by creating educational content, trying new features in the Kotin EAP allows you to be among the first to share the experience of using the new cool features with the community. Let us know if one of these descriptions applies to you by voting below this message. Respond with: 1️⃣ if you’re working on a complex multi-module project 2️⃣ if you are a library author 3️⃣ if you are a Kotlin enthusiast

This year, we ran the first Kotlin Developer Survey. We designed the survey to help us identify and prioritize the pain points that most significantly affect Kotlin users’ satisfaction. We will use the collected data to refine and prioritize the Kotlin team’s plans. 📈 Check out the first survey’s key findings, our plans to address the most popular issues we discovered, and get some tips about what you can do about them right now.

:kotlin-intensifies-purple:🌲:60fps_parrot: We invite you to join us in participating in Advent of Code in Kotlin this year! For the second year in a row, JetBrains will be sponsoring Advent of Code in 2022. It’s a great way to practice your problem-solving, keep your Kotlin skills sharp, compete, and learn from the fantastic community surrounding the event. And it’s a wonderful way to get your hands on some exclusive Kotlin prizes! 🎁 https://blog.jetbrains.com/kotlin/2022/11/advent-of-code-2022-in-kotlin/

:kotlin-intensifies-purple: 📯 Attention all who develop concurrent algorithms on the JVM! 👉 Check out our new Lincheck guide. Lincheck is a declarative framework for writing concurrent tests, and this guide walks you through its features step by step, using real-world examples to teach you how to test concurrent data structures.

📣 :kotlinconf23: Join the Kotlin Multiplatform Contest and win a trip to KotlinConf’23! https://kotlinlang.slack.com/archives/C3PQML5NU/p1667232143576329

🎥✍️💻 Shout-Out to Kotlin Multiplatform Mobile Content Creators! Kotlin Multiplatform Mobile is in Beta, and the technology’s ecosystem is continuing to expand and mature. All of this would be impossible without your contributions. Developers all over the world are sharing their experience, providing tips&tricks, and creating great educational samples to inspire learners and help complete the official resources. ⭐ Check out this blog-post for some great new content and for content ideas!

:kotlinnew: What can you expect from Kotlin in 2023? 🚄 A faster K2 compiler. 🚀 A more performant IDE based on K2. 🏰 A Stable version of Kotlin Multiplatform Mobile. 🛠️ Improved tooling for library authors. Check out the Kotlin roadmap and help us improve Kotlin!

:kotlin-intensifies-purple: 🆕 Kotlin 1.8.0 has been released and is ready for you to use! Check out what’s new from this documentation article, and stay tuned for more details later: https://kotlinlang.org/docs/whatsnew18.html

📣 :kotlinconf23: Just a few days left to submit your project to the Kotlin Multiplatform contest. 🧳 Every participant has a chance to win a trip to KotlinConf’23 and get some special Kotlin Swag. 📆 Don’t miss the January 13 deadline! 🔗 Read more: https://kotlinconf.com/contest/ 😒lack: Join the conversation: #kotlin-multiplatform-contest

📣 Be sure to update to Kotlin 1.8.0! Here are some of its biggest highlights: • New experimental functions for JVM: recursively copy or delete directory content • Improved kotlin-reflect performance • New -Xdebug compiler option for better debugging experience •

kotlin-stdlib-jdk7

and

kotlin-stdlib-jdk8

merged into

kotlin-stdlib

• Improved Objective-C/Swift interoperability • Compatibility with Gradle 7.3 Learn about new features in your favourite format (📹 / 📕)

📣 We’re researching what’s important to developers who start using Kotlin and how we can support newcomers in their first steps. If you’ve been using Kotlin for less than 6 months, please complete our survey for the chance to win a prize 🎁 👉 https://surveys.jetbrains.com/s3/kotlin-onboarding-sl

📣 :kotlin-intensifies-purple: We’ve released Kotlin 1.8.10 with fixes for some issues and regressions in 1.8.0. Check out the changelog for more details: https://github.com/JetBrains/kotlin/releases/tag/v1.8.10

Kotlin’s compiler build is now reproducible! 🛡️ An additional layer of defense against malicious code entering the build process. ⚙️ Build and verify the compiler and artifacts yourself. Learn more ➡️

📣 :kotlinconf23: KotlinConf’23 workshop-only day tickets are now available for purchase! https://kotlinlang.slack.com/archives/C4J6927RR/p1675772487506199

🆕:kotlin-intensifies-purple:😛arty-parrot: 📣 Kotlin 1.8.20-Beta brings many new features: • New Kotlin K2 compiler updates • New experimental Kotlin/Wasm target • New JVM incremental compilation by default in Gradle • Update regarding Kotlin/Native targets • Preview of Gradle composite builds in Kotlin Multiplatform • Improved output for Gradle errors in Xcode • Experimental support for AutoCloseable interface in standard library • Experimental support for Base64 encoding in standard library 📣 The K2 Compiler is going stable in Kotlin 2.0 We’ve been working on a new frontend for the Kotlin compiler (code-named “*K2*”) for quite a while. The new frontend is already available for preview – we’re continually polishing and stabilizing it and plan to make it the default compiler frontend in a future Kotlin release. We’ve decided to name this future release Kotlin 2.0. Learn more about the release roadmap and what to expect from Kotlin 2.0 Try out the new compiler frontend and give us feedback! Starting with Kotlin 1.8.20-Beta you can enable a preview of the Kotlin 2.0 language version via the regular Kotlin language version flag.

Kotlin webinars are a great way to sharpen your Kotlin skills and explore the possibilities of various developer tools! Check out our webinar schedule for the next 2 weeks and choose the webinars that interest you the most or, if you’re feeling brave, attempt them all! 📹 Advanced Kotlin Techniques for Spring Developers As a seasoned developer, you’re likely already familiar with Spring. Kotlin can take your developer experience with Spring to the next level! Join this webinar and learn how to: • Add new functionality to existing classes with Kotlin extension functions. • Use Kotlin bean definition DSL. • Better configure your application using

lateinit

. • Use sequences and default argument values to write more expressive code. By the end of this talk, you’ll have a deeper understanding of the advanced Kotlin techniques that are available to you as a Spring developer, and be able to use them effectively in your projects. 📆 Tuesday, February 14, 15:00 (UTC +2) 👉 Register 📹 Graceful Resource Handling Using Structured Concurrency in Kotlin Modern programming often requires us to make strong guarantees about how our applications terminate. One way to do this is through the use of structured concurrency, which allows us to reason about parallel processes and how they relate to each other. In this session, we will learn how to use Arrow’s Resource Domain-Specific Language (DSL) to reason about resource safety in the same way we use structured concurrency to avoid leaking resources. We will also see how this can be combined with KotlinX Coroutines to build complex use cases in a simple and elegant way using Kotlin DSLs. 📆 Thursday, February 16, 19:00 (UTC +2) 👉 Register 📹 Creative Coding With Kotlin and OPENRNDR This talk will look at the OPENRNDR library and its capabilities as a tool for visually stunning artwork. We’ll begin with an introduction to the library and cover drawing basic shapes like circles and rectangles. The focus of the talk will be a live coding session where we create a simple GUI and explore the compositor framework, showing the library in action and how it can be used to create complex visuals. We’ll conclude by showing how to create screenshots and videos of OPENRNDR projects to share them with the world. Join us to learn how to unleash the creative potential of OPENRNDR and create amazing visuals! 📆 Wednesday, February 22, 18:00 (UTC +2) 👉 Register (edited)

🆕 📹 Here’s the March edition of the Kotlin webinar series, brought to you by @antonarhipov and our guests. 📹 Application Development With Kotlin Flow - March 8 @ 4 PM UTC During the live coding session, Yury Ruchin from Synthesized will explain: • How to create and run flows. • The differences between cold flows and hot flows. • The connection between flows and coroutines. Register ▶️ https://kotl.in/aupqtp 📹 Hexagonal Architecture Inside the Hexagon Toolkit – March 22 @ 4 PM UTC Join the webinar with Juanjo Aguililla @hexagon_kt to learn about the design goals of the Hexagon Toolkit and explore the principles of Hexagonal Architecture that are applied to achieve these goals. Sign up here: https://kotl.in/rgpf66

📣 Kotlin 1.8.20-RC is out with: ✅ New Kotlin K2 compiler updates ✅ AutoCloseable interface and Base64 encoding in stdlib ✅ New JVM incremental compilation enabled by default ✅ New Kotlin/Wasm compiler backend What’s new | Changelog Help us put the finishing touches :magic_wand: on the RC by reporting any lingering issues in YouTrack