A free, once-weekly Scala news flash. Easy to unsubscribe. Goes out every Thursday.
March 10th, 2023, ISSUE 472


Contribution Equals Impact

Towards a Responsible, Sustainable, and Resilient Open Source Ecosystem for Scala.
Johanna Reichen
Scala Center's five-year impact report

The report is finally here, showing crucial stats on the vibrant job market, simplified user experience, responsible stakeholders, and growing community.
Scala Center (@scala_lang)
ZIO Streaming Applications, Transformation, and Error Handling

In this blog, we have learned why we need streaming its use cases. How we can create the dummy stream and what is the operation available on a stream. How we can handle the failure case retry and use a fallback.
Amit Kumar
Scala case class comparison using diffx

In this article, I want to show some of the nice features of this library for comparing complex data structures with ease.
Yadu Krishnan (@yadukrishnank)
Proxy large messages via S3 with pass4s

In the previous post we have learned how pass JSON and XML messages via the SNS/SQS using pass4s. This time we’ll focus on another problem, often faced when implementing messaging in backend systems. We’ll learn how to handle large messages.
Michał Pawlik


Type-Level Programming in Scala: A Hardcore Tic-Tac-Toe

This video is a Tic-Tac-Toe in Scala, at the type level. You will learn how to program at the type level with givens, in a way that specifies constraints that the compiler should solve.
Daniel Ciocîrlan (@rockthejvm)


Scalar 2023, March 23rd-24th, Warsaw, Poland

Your favourite Scala conference is back!
SoftwareMill (@scalarconf)
Call For Proposals - ZIO World 2023

Submit your talk and join the lineup!
Ziverge (@zivergetech)
ZIO World, April 21st, Lisbon, Portugal (discount!)

The hybrid third edition of ZIO World showcases the power, performance, and productivity of ZIO 2 and its growing ecosystem. Use our exclusive link to get a 10% off for Scala Times readers!
Ziverge (@zivergetech)
Scala Days, June 4th-7th (Seattle, USA), Sept 11th - 12th (Madrid, Spain)

This year’s Scala Days marks the conference’s return since it was put on hold in 2020. This year we’re happy to host in Seattle, WA, in the US, and Madrid, Spain.
Scala Days (@scaladays)
10% discount for the Scala 3 Metaprogramming (ALL-NEW) course for our readers!

Use code SCALATIMES10off and enjoy the course!
John A. De Goes (@jdegoes)
10% discount for Functional Scala, Nov 30th - Dec 1st, London

Use code ScalaTimesFS2023 and get our exclusive discount!
Ziverge (@zivergetech)


zio-config 4.0.0-RC11

Another set of improvements and bugfixes.
zio-config contributors
tapir 1.2.9

Improve the efficiency of request handling in ZIO Http & Play, AWS CDK support, and many more improvements.
tapir contributors
Quine 1.5.2

Quine is a streaming graph interpreter; a server-side program that consumes data, builds it into a stateful graph structure, and runs live computation on that graph to answer questions or compute results. This release introduces several new functions and procedures to Quine’s Open Cypher implementation and also resolves scope issues with some CREATE and MATCH possibilities.
Quine Contributors
Metals 0.11.11

Support for Scala 3.2.2, semantic tokens, new inline value code action, expanded workspace symbol search to include fields, and more.
Metals contributors

  1. Scala Times Issue #484

    Google Summer of Code 2023 Timeline. Scala 3 Enums. On the road to Scala 3. Encoding Base58: Understanding and implementing in Scala. Teach Your Web API To Speak Loud And Clear CLI!.

  2. Scala Times Issue #483

    A Splendid Scala Journey. From spring boot to ZIO. Two More Old Cents on Scala 3 Migration. Functional Design with Scala 3, May 29th-30th. 10% discount for LambdaConf, Sept 16th-19th, Boulder, Colorado.

  3. Scala Times Issue #482

    The Scala 3 compatibility story. The RedMonk Programming Language Rankings: January 2023. Akka: Enabling the Cloud to Edge Continuum. Writing a GitHub Action with Scala.js. Chain of responsability with Scala partial functions.

  4. Scala Times Issue #481

    Scala and Kotlin Under One Roof. Intermediate's guide to derivations in Scala: Magnolia. Replacing sbt with scala-cli in a simple project. Scala Server Security with Http4s: CORS and CSRF. Art of Scala, May 25th, Warsaw.

  5. Scala Times Issue #480

    More than just HelloWorld.json in sttp & upickle. Single-File JVM Apps: Rapid Development. Single-File JVM Apps Pt. 2: AWS Lambda Simplified. Mastering SBT: Tips and Tricks for Using Not-So-Common Features. Accumulate errors in Scala with typelevel cats.

  6. Scala Times Issue #479

    Kotlin Coroutines to Cats-Effect. Build your vocabulary with Scala affixes. Scala.js Interoperability with TypeScript/JavaScript. Introduction to Scala Development using VS Code. Call For Proposals - ZIO WORLD 2023 .

  7. Scala Times Issue #478

    Concurrency with Cats Effect. Using Vulcan Codecs with Kafka Java APIs. Scala Center Activity Report for 2023 Q1. Are you sure your Scala 3 opaque types don’t instantiate?. Underrated Scala Features and Hidden Gems in the Standard Library.

  8. Scala Times Issue #477

    Good practices for schema evolution with Protobuf using ScalaPB and fs2grpc. New Scala Build Tool. March 2023 - Scala Tooling Summit. Conferences are BACK! (Scalar Conf 2023 recap). Direct Style Scala.

  9. Scala Times Issue #476

    ZIO SQL: Type-safe SQL for ZIO applications. Go-like channels using project Loom and Scala. Functional Error Handling in Scala. Top 10 pattern matching tips in Scala. Programming in Scala: Carbon Footprint.

  10. Scala Times Issue #475

    Actor implementation experiments with ZIO. Vote for Scala support in JetBrains Fleet IDE. 10+ Scala Concepts you Need to Know. Call For Proposals - ZIO WORLD 2023 . 10% discount for Functional Scala, Nov 30th - Dec 1st, London.

  11. Scala Times Issue #474

    RFC-1: sbt cache ideas. Functional Programming anti-patterns in Scala. Why use Scala for building backend applications?. Pragmatic DDD in Scala with ZIO. Call For Proposals - ZIO WORLD 2023 .

  12. Scala Times Issue #473

    Enum serialization in Scala. The official Scala programming language Mastodon account. Functional Programming is Based. Scala is Ready to Power the Future of Financial Services Today. VS Code Profile for Scala.

  13. Scala Times Issue #472

    Contribution Equals Impact. Scala Center's five-year impact report. ZIO Streaming Applications, Transformation, and Error Handling. Scala case class comparison using diffx. Proxy large messages via S3 with pass4s.

  14. Scala Times Issue #471

    A solid checklist for configuring new Scala projects. Coding Adventures with Party Parrot. Scala Center Is Accepted as a Mentor Organization for GSoC 2023!. Scala 3's New Compile-Time Features. Exclusive Scalar offer for Scala Times subscribers.

  15. Scala Times Issue #470

    Kubernetes and the JVM. Exploring Scala CLI  -  the new scala runner. An incomplete guide to Scala 3 macros and Multi-stage programming. Web Scraping with Scala. Cross build anything with Bazel.

  16. Scala Times Issue #469

    Performance tips for IntelliJ Scala Plugin. Introduction to Bazel for Scala developers. Gradle Inc. Acquires Triplequote to Expand Developer Productivity Solutions Footprint. Concise enumeration in Scala. Akka Streams - Working with Stage Actors.

  17. Scala Times Issue #468

    Prototype Loom-based concurrency API for Scala. Why Learn Contextual Abstractions in Scala 3 First. 10 years of Scala.js. ZIO From Scratch (Part 4). ZIO From Scratch (Final).

  18. Scala Times Issue #467

    Scala Center Roadmap for 2023 and Beyond. How to use a Rust lib inside the Scala app. Scalar 2023, March 23rd-24th, Warsaw, Poland.

  19. Scala Times Issue #466

    Pub/Sub with Scala. 6 Tips for Scala Adoption. Implicit parameters when to use them? Part 2. Call for Scala GSoC 2023 projects!. Scalar 2023, March 23rd-24th, Warsaw, Poland.

  20. Scala Times Issue #465

    Deploy http4s on your domain with fly.io. Early adventures in ZIO land. Implicit parameters when to use them? Part 1. Tour of Scala. Sttp4: improving the developer experience.

  21. Scala Times Issue #464

    Scala CLI Tutorial: Creating a CLI Sudoku Solver. Scalar 2023, March 23rd-24th, Warsaw, Poland. NEScala 2023 Call to Action.

  22. Scala Times Issue #463

    Universally Unique Sortable Identifier - ULID. Compile time validation using inline modifier in Scala 3. Thank you for taking part in Advent of Code 2022!. Nix Flake for Scala - a Nix Introduction, Overview and Demo. Scalar 2023, March 23rd-24th, Warsaw, Poland.

  23. Scala Times Issue #462

    Support Scala Center. Dancing with ZIO. Scalar 2023, March 23rd-24th, Warsaw, Poland. NEScala 2023 Call to Action. CFP: ScalaMatsuri (Online event, April 15th-16th 2023).

  24. Scala Times Issue #461

    Python and ZIO crushed my egotism. Fast Scala 3 parsing with tree-sitter. Scalar 2023, March 23rd-24th, Warsaw, Poland. NEScala 2023 Call to Action. CFP: ScalaMatsuri (Online event, April 15th-16th 2023).

  25. Scala Times Issue #460

    Fabric: A New JSON Library. Benchmarking Kafka vs Akka Brokerless Pub/Sub. Scala Developer Survey 2022 Results. State of Scala survey 2022. Integration testing using docker containers in Scala.

Organizing an event?
Promote it with
Scala Times.
The Scala Times reader?
Get a banner!
Got a tip?Send it in!
Follow us onTwitter.
Curated bySoftwareMill.
We arehiring.
Andtaking on projects.