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May 16th, 2025, ISSUE 583

READING

Workflows4s Finally Released - You Might Hate Your Business Processes a Little Less

This article covers why Workflows4s was created, its current state, and planned future developments.
Voytek Pituła (@Krever01)
Business4s & GSoC 2025: 3 Exciting Projects and Not-So-Usual Approach

Learn which three projects were selected by Google and the Scala Center for this summer’s program.
Voytek Pituła (@Krever01)

VIDEOS

Unison, Scala, Distributed Systems and Delightful Programming

Daniel Ciocîrlan (RockTheJVM) interviews Rúnar about the features Unison, influences of Scala, and many more topics!
Rúnar Bjarnason (@runarorama)

EVENTS

ScalaWAW #34 May 26th, Warsaw

Planned talks: "Scala 3 support in IntelliJ Scala Plugin" by Maciej Gorywoda and Easier Scala Builds with the Mill Build Tool" by Haoyi Li
ScalaWAW (@scalawaw)
Scala Hamburg: Recursion Schemes & Mill, Jun 2nd, Hamburg, Germany

"Recursion is the goto of functional programming" by Markus Klink, and "Improving the Scala Build Tool Experience" by Haoyi Li
Scala Hamburg
10% discount for Lambda Days, June 12th-13th, Kraków, Poland

Our event is one of the biggest functional programming conferences in Europe with 2 days packed with inspiring talks, networking opportunities, and, of course, some fun(). Use promo code Time4Scala for a special discount for our readers!
LambdaDays (@LambdaDays)
Scala Days, Aug 19th - 21st, Lausanne, Switzerland

Leaders from Scala User Groups and global communities, students, and language contributors will gather to discuss academic research, use cases, and visionary projects for a two-day, action-packed event.
Scala Days (@scaladays)
The Scala Workshop, Oct 13th, Singapore

The Scala Workshop is the continuation of the Scala Symposium, providing a forum for researchers and practitioners to discuss the design, implementation, and applications of the Scala programming language. Topics include language features, compiler internals, type systems, libraries, tools, and industrial applications.
EPFL

RELEASES

yaes 0.3.0

No new effects this time ...but a whole streaming data structure! The Flow[A] type was added, inspired by the Flow<T> streaming type of the Kotlin language! Check out the new yaes-data module.
Riccardo Cardin (@riccardo_cardin)
Kyo 0.19.0

First-class support for computation nesting, new Tag, Stream improvements, Sink, Karray, More flexible effect handling, a bunch of optimizations and much more!
Kyo contributors





  1. Scala Times Issue #583

    Workflows4s Finally Released - You Might Hate Your Business Processes a Little Less. Business4s & GSoC 2025: 3 Exciting Projects and Not-So-Usual Approach. Unison, Scala, Distributed Systems and Delightful Programming. ScalaWAW #34 May 26th, Warsaw. Scala Hamburg: Recursion Schemes & Mill, Jun 2nd, Hamburg, Germany.


  2. Scala Times Issue #582

    How Scala Ruined My Java (in a good way). IntelliJ IDEA x Scala: Named Tuples. Random Scala Tip #624: The Pitfalls of Option Blindness. From JavaScript to Scala. Scala 3: The Evolution of a Macro.


  3. Scala Times Issue #581

    WORKSHOP: Principled Metaprogramming in Scala 3. The Scala Workshop 2025 - The Scala Workshop 2025. Programming a Language by Nicolas Rinaudo | Scalar Conference 2025.


  4. Scala Times Issue #580

    On vibe coding. Composing Independent Instruction Sets with Free Monads in Scala 3. Announcing Scala.js 1.19.0. Tagless Final for Humans by Noel Welsh | Scalar Conference 2025. Release v1.0.0-RC19 · zio/zio-dynamodb · GitHub.


  5. Scala Times Issue #579

    Scalar Conference 2025 - Summary & Highlights. Experimental Capture Checking: New Syntax for Explicit Capture Polymorphism. Whiteboxish Macro Powers with Named Tuples. IntelliJ Scala Plugin 2025.1 Is Out!. J On the Beach, May 14th - 16th, Málaga, Spain.


  6. Scala Times Issue #578

    Sttp client 4: the Scala HTTP client you always wanted, released!. London Scala User Group Meetup, Apr 16th, London. J On the Beach, May 14th - 16th, Málaga, Spain. 10% discount for Lambda Days, June 12th-13th, Kraków, Poland. Scala Days 2025 CFP, Aug 19th - 21st, Lausanne, Switzerland.


  7. Scala Times Issue #577

    Tagged vs Untagged Unions (in Scala). -XX:+UseCompactObjectHeaders is your new TURBO button for JDK 24+ . Scala Days proposal online hack, Apr 3rd, 8PM CEST, online event. London Scala User Group Meetup, Apr 16th, London. J On the Beach, May 14th - 16th, Málaga, Spain.


  8. Scala Times Issue #576

    API First Scala. Strategies for Efficiently Parallelizing JVM Test Suites. Publishing ZIP artifacts with SBT. London Scala User Group Meetup, Apr 16th, London. J On the Beach, May 14th - 16th, Málaga, Spain.


  9. Scala Times Issue #575

    Data Plumber - Data Integration Pipeline. 15% discount for Scalar, Mar 27th - 28th, Warsaw, Poland. London Scala User Group Meetup, Apr 16th, London. J On the Beach, May 14th - 16th, Málaga, Spain. CFP for Lambda Days, June 12th-13th, Kraków, Poland.


  10. Scala Times Issue #574

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  11. Scala Times Issue #573

    GSOC 2025: Call for contributors. Drawing Heighway’s Dragon - Recursive Function Rewrite. From Python to Scala: Rewriting 27k Lines of a CLI. Spotify FOSS Fund 2024. Functional World #16, Mar 11th, Online Event.


  12. Scala Times Issue #572

    Rock the JVM partners with the Scala Center. Typelevel Summer of Code 2025. Functional World #16, Mar 11th, Online Event. 15% discount for Scalar, Mar 27th - 28th, Warsaw, Poland. London Scala User Group Meetup, Apr 16th, London.


  13. Scala Times Issue #572

    Fast Incremental JVM Assembly Jar Creation with Mill. Calling Scala Native from Java using FFM. Announcing Scala Days 2025, Aug 19th - 21st, Lausanne, Switzerland. Scala In The City, Feb 25th, Hamburg, Germany. Scala in the City, Feb 26th, Berlin, Germany.


  14. Scala Times Issue #571

    Fast Incremental JVM Assembly Jar Creation with Mill. Calling Scala Native from Java using FFM. Announcing Scala Days 2025, Aug 19th - 21st, Lausanne, Switzerland. Scala In The City, Feb 25th, Hamburg, Germany. Scala in the City, Feb 26th, Berlin, Germany.


  15. Scala Times Issue #570

    Scala Highlights from 2024. Rust from a Scala Perspective: Advent of Code 2024. Scalar, Mar 27th - 28th, Warsaw, Poland. J On the Beach, May 14th - 16th, Málaga, Spain. CFP for Lambda Days, June 12th-13th, Kraków, Poland.


  16. Scala Times Issue #569

    Scala Tooling Spree #1 recap. Scala 3 Migration: Report from the Field. Circuit Breaker — Ox 0.x documentation. The joys of messaging without a message bus. Scalar, Mar 27th - 28th 2025, Warsaw, Poland.


  17. Scala Times Issue #568

    GSoC 2025: Call for Scala projects. Next Scala 3 LTS series will increase minimum required JDK version. Pre-SIP: A Syntax for Collection Literals. Scala Macros and Metaprogramming course. Scalar, Mar 27th - 28th 2025, Warsaw, Poland.


  18. Scala Times Issue #567

    Recap of Advent of Code 2024. Running Cask with Virtual Threads. Zio Schema vs Rust Serde. Scalar, Mar 27th - 28th 2025, Warsaw, Poland. CFP for Lambda Days, June 12th-13th 2025, Kraków, Poland.


  19. Scala Times Issue #566

    Random Scala Tip #568: Beware of Leaking Iterators. Announcing ScalaMock 7. Functional Programming In Scala, Jan 25th, Online Event. Scalar, Mar 27th - 28th 2025, Warsaw, Poland. CFP for Lambda Days, June 12th-13th 2025, Kraków, Poland.


  20. Scala Times Issue #565

    Random Scala Tip #697: Avoid Anonymous Functions as Dependencies. Scalar, Mar 27th - 28th 2025, Warsaw, Poland. CFP for Lambda Days, June 12th-13th 2025, Kraków, Poland. IntelliJ IDEA x Scala - Enums Support.


  21. Scala Times Issue #564

    Google Summer of Code 2024 - Going Feral on The Cloud. Rant on Scala3 tooling (IntelliJ/metals). Scalar, Mar 27th - 28th 2025, Warsaw, Poland. CFP for Lambda Days, June 12th-13th 2025, Kraków, Poland. Where Are the Scala Frameworks? .


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  24. Scala Times Issue #561

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