A free, once-weekly Scala news flash. Easy to unsubscribe. Goes out every Thursday.
October 6th, 2022, ISSUE 450

VIDEOS

SBT in Scala (part 2) - Setting up Modules, Organizing Builds, Using Plugins

We learn to create multi-module projects, navigate around them with the SBT console, pass different settings and definitions for each, making them depend on each other. We also learn how to modularize build.sbt with constants and arbitrary Scala code, then we learn how to use plugins and build an application with sbt-assembly.
Daniel Ciocîrlan (@rockthejvm)

EVENTS

ZIO Hackathon, October 27th-28th, New York, USA & Online

We will share and learn about ZIO and related projects; chat about functional programming, functional Scala, and much more; work on fun projects; and get to know one another. No prior background knowledge of ZIO is assumed.
Ziverge (@zivergetech)
Functional Scala 2022, December 1st-2nd, London

Use our link and get a 10% discount for Scala Times readers!
Ziverge (@zivergetech)

READING

A tapir looms in the distance

We'll need to do some adjusting in the Scala ecosystem to integrate more seamlessly with Loom. Good news is both sttp client and tapir are ready!
Adam Warski (@adamwarski)
State of Scala 2022 by ScalaCenter and VirtusLab

Help us collect data about how developers use Scala, and what they would like to learn.
VirtusLab (@VirtusLab)
The Trouble with Checked Exceptions: Part 2

It’s difficult, however, to convince people that their carefully designed, super explicit return types are actually a smell of bad design. Therefore, the legend and allure of checked exceptions will persist.
Alexandru Nedelcu (@alexelcu)
Akka Fork: Pekko Proposal

Pekko is a fork of the Akka project just before its licence changed from Apache 2 to Business Source License 1.1.
Ryan Skraba
Execute Shell Commands in Java/Scala/Kotlin

The following describes snippets for executing shell commands, in Java, Scala, and Kotlin, using standard functionality. It’s also useful to compare Java vs Scala vs Kotlin for this particular problem.
Alexandru Nedelcu (@alexelcu)
Metaprogramming in Scala 2 & 3 - VirtusLab

In this article, you’ll learn more about changes in Scala 3’s metaprogramming functionality compared to Scala 2.
Jan Chyb

LISTENING

Tooling Talks - The Scala Improvement Process (SIP)

In this talk we'll dive into the SIP process, talk about what it is, how tooling relates to it, and a bit about some of the current proposals.
Chris Kipp, Gabriele Petronella (@ckipp01)

RELEASES

zio-sql 0.0.3

New Scope-style transactions, alternative syntax for column selection, ZIO 2.0.2, ZIO Schema 0.2.1.
zio-sql contributors
cats-effect 3.4.0-RC1

High performance Queue, hardened Queue semantics, more robust Dispatcher (and Supervisor!), experimental Scala Native support, improved runtime performance on foreign Runnables, Serializable support, and more!
cats-effect contributors
Metals 0.11.9

This version brings some of the final missing features in Scala 3 and greatly improves its performance.
Metals contributors





  1. Scala Times Issue #458

    Grenoble Scala User Group (France). Getting started with Scala.js, Laminar and ScalablyTyped. Finagle Tutorial: Twitter's Scala RPC Library. Scalar 2023, March 23rd-24th, Warsaw, Poland. NEScala 2023 Call to Action.


  2. Scala Times Issue #457

    Native Config Lands in ZIO 2.0 . Automatic parallelisation of for-comprehensions in Scala 3. The Journey of a Dotty Diagnostic. The Magic of Lazy Lists. Scala 3: the missing compiler plugin.


  3. Scala Times Issue #456

    Scala Toolkit makes Scala powerful straight out of the box. Scala 3 migration: 7 benefits that outweigh the risks. Google Summer of Code 2022: How It Was. Things that are things, but not other things. Function reuse is just wishful thinking.


  4. Scala Times Issue #455

    Integrating Java APIs with Cats Effect. Speed up ZIOs with memoization. Archive your toots to Hugo. Software Engineering Radio: on Scala and Tapir . Top 10 Skills to Learn to Be a Scala Developer.


  5. Scala Times Issue #454

    I ❤️ Scala's Community. Immutable Collections should be Your Default. Data Transformations in Scala with Gallia: Version 0.4.0 Is Out. Quine 1.4.0: Scale, Stability, Supernode Mitigation. Functional Scala 2022, December 1st-2nd, London.


  6. Scala Times Issue #453

    Scala for Game Server Development. Pekko accepted into the Apache Incubator. On Scala 3's Optional Braces. ZIO HTTP Tutorial, Part 2 - Security, CORS, CSRF, Authentication, Websockets. Where to find a Remote Scala Job?.


  7. Scala Times Issue #452

    The case against Effect Systems (e.g., the IO data type). Cut the Technobabble. Build Web Apps with ZIO 2.0, October 17th-19th. ZIO Hackathon, October 27th-28th, New York, USA & Online. Functional Scala 2022, December 1st-2nd, London.


  8. Scala Times Issue #451

    Support for XML request responses in sttp and tapir. Scala Center Activity Report for 2022 Q3. SBT in Scala (part 3). ZIO API Design Techniques. Migrating From Akka to ZIO Panel Discussion.


  9. Scala Times Issue #449

    ZIO Hackathon, October 27th-28th, New York, USA & Online. Functional Scala 2022, December 1st-2nd, London. A tapir looms in the distance. State of Scala 2022 by ScalaCenter and VirtusLab. The Trouble with Checked Exceptions: Part 2.


  10. Scala Times Issue #450

    ZIO Hackathon, October 27th-28th, New York, USA & Online. Functional Scala 2022, December 1st-2nd, London. A tapir looms in the distance. State of Scala 2022 by ScalaCenter and VirtusLab. The Trouble with Checked Exceptions: Part 2.


  11. Scala Times Issue #448

    From Akka to ZIO. ZIO Hackathon, October 27th-28th, New York, USA & Online. Functional Scala 2022, December 1st-2nd, London. Akka fork applying for Apache Project.


  12. Scala Times Issue #447

    Migrating from Akka HTTP to tapir. How to make Akka serialization bulletproof. Manage library breaking changes with Scalafix. Akka Fork FUD. SBT in Scala (part 1).


  13. Scala Times Issue #446

    Reconciling Spark APIs for Scala. Scripting with Scala. ING Contact Center 2.0  -  Creating Resilient APIs. Functional event sourcing with cats-effect. ZIO Streams Part 1 (The Channel Type).


  14. Scala Times Issue #445

    Containers Redux - Capturing Type Class information for myriad types. Why We Are Changing the License for Akka. ZIO Streams, Part 3: A Bigger Example. SIP-44 - FEWER BRACES in Scala3. Functional Scala 2022 CFP.


  15. Scala Times Issue #444

    Learn Scala 3 The Fast Way!. Implementing Raft using Project Loom. How to prevent Scala 3 compiler regressions with Community Build. Scala is Improving. Tooling Talks - Scaladoc from Scratch.


  16. Scala Times Issue #443

    Implementing Raft using a functional effect system. Reactive Event Sourcing benchmarks, part 1: PostgreSQL. Functional Scala 2022 CFP. ScalaCon 2022 CFP, October 4th-5th, virtual event. ZIO Hackathon, October 27th-28th, New York, USA & Online.


  17. Scala Times Issue #442

    Selection functions are interesting notion with tricky implementation. Tagless final  -  from a different perspective. Long-term compatibility plans for Scala 3. Static Dynamics - Expression definable datatypes in Scala. Top Link of July: Foldable and Traverse with Scala and Cats.


  18. Scala Times Issue #441

    The future of effects in Scala?. ZIO 2 dot Ohhhhh!. Functional Programming Crash Course for Scala Beginners. Functional Scala 2022 CFP. ScalaCon 2022 CFP, October 4th-5th, virtual event.


  19. Scala Times Issue #440

    Teach Programming with Scala. CQRS with Scala, Akka, and Cassandra. Lambda Days, July 28th-29th, Kraków, Poland. Functional Scala 2022 CFP. ScalaCon 2022 CFP, October 4th-5th, virtual event.


  20. Scala Times Issue #439

    A Prelude of Purity: Scaling Back ZIO. Scala Improvement Process - Evolving Scala openly and collaboratively. Secure the Dependencies of your Scala Project on Github. Type safety with refined. Architecture of Metals.


  21. Scala Times Issue #438

    NonEmptyLists more or less. Cats vs ZIO. ScalaWAW #22 - garden grill party, July 20th, Warsaw, Poland. Lambda Days, July 28th-29th, Kraków, Poland. Functional Scala 2022 CFP.


  22. Scala Times Issue #437

    Foldable and Traverse with Scala and Cats. Ergonomics of end markers. Functional Scala 2022 CFP. Lambda Days, July 28th-29th, Kraków, Poland. ScalaCon 2022 CFP, October 4th-5th, virtual event.


  23. Scala Times Issue #436

    Persistent data structures in functional programming. Concurrent Sudoku Solver: Part 4 - Using FS2 Stream + Topic. Scala or Go: Who Wore It Better?. Fields  -  Scala Validation Library. Zymposium - Derivable Differs.


  24. Scala Times Issue #435

    Scala at Prezi: Introduction of ZIO. First 5 years of the Scala Center. Disjoint Graph Unions: Performance Case Study. Functional Scala 2022 CFP. Lambda Days, July 28th-29th, Kraków, Poland.


  25. Scala Times Issue #434

    Creating CLI tools leveraging ZIO and Decline using scala-cli. Apache Spark 3.0 Exciting Capabilities. Validation in Scala 3 with Cats. ZLayers in ZIO 2.0 are a totally different BEAST!. It's time to traverse (SPFS #11).


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.