A free, once-weekly Scala news flash. Easy to unsubscribe. Goes out every Thursday.
July 25th, 2024, ISSUE 542

READING

Effective Error Handling

It would be easy to conclude that we must choose between composable but unsafe code, and safe but verbose code. Through a combination of features in Scala 3, this is now a false dichotomy: composable and safe code is within reach, without compromises.
Jon Pretty (@propensive)
ifdef 0.3.0: conditional compilation in Scala

You can use your imagination to expand to other axes that may have previously required different directories to cross build.
Eugene Yokota (@eed3si9n)
Developer Ecosystem Survey 2024

Welcome to the eighth annual Developer Ecosystem Survey by JetBrains – our study to explore the current state of the software development industry. The survey will take you approximately 25–30 minutes to complete.
JetBrains (@jetbrains)
Pseudorandom Acts of Kindness

Yes, you guessed it, it's another cool library in Jon's Soundness suite! Capricious provides an interface to harness randomness and provide determinism where we need it.
Jon Pretty (@propensive)
Scala 3 Metaprogramming Learning Resources

A list of articles and other material helping to learn Scala 3 metaprogramming.
Artūras Šlajus (@arturaz_)
Scala to WebAssembly: How and Why

Previously, Scala couldn’t directly compile to Wasm, but now Scala.js will support Wasm as its new linker backend, thanks to the collaborative efforts of the ScalaCenter and VirtusLab.
Rikito Taniguchi (@tanishiking25)

EVENTS

ScalaIO CFP

CFP closes at August 12, 2024 22:43 UTC, August 13, 2024 00:43 CEST
ScalaIO (@ScalaIO_FR)
Building Better Open Source with John A. De Goes, every Fri until September 2nd, Online event

Want to learn how open source software is made, or maybe get some help improving existing OSS? Then mark your calendars for Friday, the next Zymposium, 12 noon - 1pm Eastern Time.
Scala Portugal
Lambda World. Oct 2nd - 4th, Cadiz, Spain

Don't miss he largest Functional programming event in South Europe!
Lambda World (@lambda_world)

VIDEOS

Emacs Scala Eglot TreeSitter Nix setup using Home Manager

In this video I try to explain how to achieve a very functional, fast and configurable setup for developing with Scala, on Emacs, with Nix too.
Josep Bigorra

RELEASES

smithy4s-curl

Curl-based Scala Native client implementation for Smithy4s services.
Anton Sviridov (@velvetbaldmime)
uPickle 4.0.0

4.0.0 is a major breaking change in uPickle, including in the serialization format for many common data types (Options, sealed traits, etc.), as well as breaking binary compatibility. Please be careful upgrading and follow the instructions.
Li Haoyi (@li_haoyi)
recons

Recons allows you to embed a Scala REPL server into your application, and connect to it from outside. This is mostly useful as an advanced troubleshooting utility, giving you almost unlimited access to all the guts and internals of your running application.
Roman Janusz (@rjghik)





  1. Scala Times Issue #561

    Scala's Hidden Treasures: Five ZIO-Compatible Libraries you didn't know you needed!. A succinct early exit trick for Option in Scala. Integrate JobRunr into Play Framework. Relative simple and small type-driven dependency injection. Scala Space in 2025 .


  2. Scala Times Issue #560

    Free Develocity Build Scans. Pragmatic Type-Level Design. Join us for the Advent of Code 2024. Zio-kafka, faster than java-kafka. Debugging a Scala Compilation Issue, a journey into Variance and LUB.


  3. Scala Times Issue #559

    Last bounties to collect for tapir and sttp. Mill $1000 bounty: Use Scala-Native for Mill Client. Free Develocity Build Scans. 10% discount for Scala Times readers for Functional Scala conference!. Scalar, Mar 27th - 28th 2025, Warsaw, Poland.


  4. Scala Times Issue #558

    New Module Layout for sbt Projects. How I SBT - V. Zionomicon for ZIO 2.1 (free ebook). 10% discount for Scala Times readers for Functional Scala conference!. Scalar, Mar 27th - 28th 2025, Warsaw, Poland.


  5. Scala Times Issue #557

    What is Functional Programming?. Announcing Akka 3. Idiomatic dependency injection for ZIO applications in Scala. ZIO in 2025. Upcoming Changes to Givens in Scala 3.7.


  6. Scala Times Issue #556

    Benchmark results: jsoniter-scala vs simdjson-java . Scalar 2025 extends call for papers!. Scala.IO, Nov 7th-8th, Paris. Functional Scala CFP, Dec 5th, online event. 10% discount for Scala Times readers for Functional Scala conference!.


  7. Scala Times Issue #555

    (In)Validating Library Design. Postmortem of Scala 3.6.0. How to implement LETS on ChainCash. Scalar 2025 extends call for papers!. Scala.IO, Nov 7th-8th, Paris.


  8. Scala Times Issue #554

    SoftwareMill Open Source Bounties. Scala: a mature open-source project. Folding Cheat Sheet #8 - Folding with Monoids . Simple Contract-First Applications. Scalar 2025 extends call for papers!.


  9. Scala Times Issue #553

    Direct-style concurrent streaming. Open com-lihaoyi issue bounties. Scala Project Maintenance Survey. Scalar 2025 extends call for papers!. Scala.IO, Nov 7th-8th, Paris.


  10. Scala Times Issue #552

    Optimal Scalafmt configuration using Genetic Algorithms. Cancellable HTTP requests via Scala's Tapir. Game of Life with Scala.js and Webassembly. Scala without effect systems. The Martin Odersky way.. Scalar 2025 Early Birds!.


  11. Scala Times Issue #551

    Functional Programming in Scala - Edu Plugin. Inline your boilerplate - harnessing Scala 3 metaprogramming without macros. Scalar 2025 Early Birds!. Lambda World, Oct 2nd - 4th, Cadiz, Spain. Art of Scala, Oct 10th, Warsaw, Poland.


  12. Scala Times Issue #550

    Autowire: Zero-Cost Dependency Injection. Another bunch of com.lihaoyi Mill issue bounties. Comparison of Kyo and traditional effects. Scala & Akka: How to secure your code. Fun with Types: All Types of Physics Computations.


  13. Scala Times Issue #549

    Capabilities for Control. Scalar 2025 Call for Papers is open!. Unison Forall, Sept 20th, remote conference. Lambda World. Oct 2nd - 4th, Cadiz, Spain. Call for Speakers - Art of Scala, Oct 10th, Warsaw, Poland.


  14. Scala Times Issue #548

    Perfect Tab Completions. David's programming examples knowledge base. Writing an Android app with Scala.js. Unison Forall, Sept 20th, remote conference. Lambda World. Oct 2nd - 4th, Cadiz, Spain.


  15. Scala Times Issue #547

    Streaming Hash Computations. Launch Scala, faster than Native. Distributed locks in Kubernetes with Scala. The Future Software Engineer. Lambda World. Oct 2nd - 4th, Cadiz, Spain.


  16. Scala Times Issue #546

    Upcoming Changes to Givens in Scala 3.7. Unexpected Scala Functions: groupMap. Lambda World. Oct 2nd - 4th, Cadiz, Spain. Call for Speakers - Art of Scala, Oct 10th, Warsaw, Poland. Scala.IO, Nov 7th-8th, Paris.


  17. Scala Times Issue #545

    ZIO-like dependency injection using implicit resolution. The Mechanics of Mitigation. Publishing test traces to Grafana using otel4s and weaver. Announcing Decisions4s: When Ifs Are Not Enough. State of structural typing support in Scala 3.3.0.


  18. Scala Times Issue #544

    Direct-style Bootzooka: 2024 update | SoftwareMill. The Tri-Z Architecture: a Pattern for Layering ZIO Applications in Scala. The Error Management Manifesto. Migrating to Safety. Benchmarking database sharding in Akka | @lightbend.


  19. Scala Times Issue #543

    Lambda World. Oct 2nd - 4th, Cadiz, Spain. Metals v1.3.4 - Thallium | Metals.


  20. Scala Times Issue #542

    Effective Error Handling. Developer Ecosystem Survey 2024. Pseudorandom Acts of Kindness. Scala 3 Metaprogramming Learning Resources. Scala to WebAssembly: How and Why.


  21. Scala Times Issue #541

    Tapir documentation improvements. Checked exceptions: fixed!. Use cases for Scala. ScalaWAW #33 - beach party! Jul 25th. Lambda World. Oct 2nd - 4th, Cadiz, Spain.


  22. Scala Times Issue #540

    PureConfig with Scala 3 - Tutorial. Developer Experience in Open Source Software. "Learn Functional Programming The Fast Way!" PDF is free. ScalaBridge London @ SiriusXM!, Jul 18th. ScalaWAW #33 - beach party! Jul 25th.


  23. Scala Times Issue #539

    YAML as a valid Scala 3 code. ExecutionContext.parasitic and Friends. ScalaBridge London @ SiriusXM!, Jul 18th. Lambda World. Oct 2nd - 4th, Cadiz, Spain. Faster and less mysterious sbt builds with Develocity.


  24. Scala Times Issue #538

    Make Impossible States Unrepresentable: Network Edition!. Ten things I like about Scala 3. Compiling Bad Code. The ZIO 2 “mental model”. JetBrains course: Functional Programming in Scala.


  25. Scala Times Issue #537

    A Logic Circuit Simulator with Cats-Actors. Magda Stożek - My Scala Story. Lambda World. Oct 2nd - 4th, Cadiz, Spain. ScalaBridge London Jun 20th, 2024. Armored type safety with Iron.


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 by SoftwareMill.
We are hiring.
And taking on projects.