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July 15th, 2021, ISSUE 387


Will Scala 3 be your new favorite language?

See what’s new in Scala 3 and get an overview of some of its most interesting features.
Chris Rybarczyk
Programming with Functions #8: Monads

Monads. The you know what. That dreaded word. Monoids in the category of endofunctors. Burritos with rules. They have a bad reputation as unclear, overcomplicated structures which nobody really can explain. But are they?
Maciej Gorywoda (@makingthematrix)
Part 5 - ZIO.access - Getting Started with ZIO in Scala3

In this video we will continue implementing our own version of ZIO. In this one we introduce the ZIO.access and ZIO.accessM patterns.
DevInsideYou (@DevInsideYou)


Functional Effects with ZIO 2.0 (SF Bay Area Edition), Jul 26th - Jul 30th

In this course, Scala developers will learn how to solve complex problems in asynchronous, concurrent programming using the ZIO library. Use our link to get a 20% discount for Scala Times readers!
John A. De Goes (@jdegoes)
Advanced ZIO (SF - Bay Area Edition), Aug 30th - Sep 3rd

In this course, developers will explore the edges and corners of the ZIO library, taking a close look at the fine-grained interruption, custom concurrency structures, streams, application configuring and tuning, and metrics and monitoring. Use our link to get a 20% discount for Scala Times readers!
John A. De Goes (@jdegoes)
12th ACM SIGPLAN Scala Symposium Call for Papers

Paper submission: August 5, 2021, Paper notification: September 6, 2021, Camera ready: September 10, 2021, Scala Symposium 2021: October ???, 2021
Scala Symposium
Functional Design (SF - Bay Area Edition), Sep 27th - Oct 1st

In this course, developers will learn how to write simple functional solutions to everyday business problems, without jargon and without type classes. Use our link to get a 20% discount for Scala Times readers!
John A. De Goes (@jdegoes)
Functional Scala Fundamentals (SF - Bay Area Edition), Oct 17th - 22nd

In this course, developers will learn the foundations of functional Scala, including language features that are unique to functional Scala, core concepts in functional programming, and proven techniques for developing robust and powerful applications in functional Scala. Use our link to get a 20% discount for Scala Times readers!
John A. De Goes (@jdegoes)
ZIO Hackathon, Oct 29th - 31st (CET)

Join this free event! 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.
Ziverge (@zivergetech)
ScalaCon, November 2nd - 5th

ScalaCon is a collaborative project brought to you by the folks behind Scala eXchange and Scala Days! Join us for two conferences packed with over 43 talks, networking opportunities, virtual sponsor booths, and a safe space for talking about our favorite language, its past , present, and future. Use code SCTIMES10 for a special discount for our readers!
ScalaCon (@scalacon)
Build Web Servers with ZIO (SF - Bay Area Edition), Nov 15th - 19th

In this course, developers will use ZIO and best-in-breed libraries to rapidly construct web applications that are scalable; easy to test, refactor, and maintain; and which never leak resources or deadlock. Use our link to get a 20% discount for Scala Times readers!
John A. De Goes (@jdegoes)
Functional Scala, Dec 2nd - 3rd

Functional Scala 2021 returns for another year of great talks, familiar and fresh spaces, and positive energy around the power of functional Scala for delivering compelling solutions to the toughest technology problems. Use promo code SCALATIMES10 for a discount for our readers!
Functional Scala (@FunScala2021)


tapir 0.18.0

Scala 3 support, a bunch of breaking changes and dependency updates.
tapir contributors
Monocle 3.0.0

Changed organization, new focus macro, plus a lot of API updates as well as some deprecations.
Monocle contributors
Metals v0.10.3 - Tungsten

We're happy to announce the release of Metals v0.10.3, which brings support for the long awaited Scala 3.0.0 version together with some important improvements.
Tomasz Godzik

  1. Scala Times Issue #389

    An intro to the Scala presentation compiler. From Scala 2 shapeless to Scala 3. IntelliJ Scala Plugin 2021.2. Scastie with Scala 3. Tooling Talks Episode 3 - Justin Kaeser.

  2. Scala Times Issue #388

    Data Times - Big Data and ML enthusiasts news flash. Story of importing a large dataset to Akka Cluster. Combining the terminal (iTerm) with the IDE. Metaprogramming in Scala 3: Inline. Part 6 - zio.Has - Getting Started with ZIO in Scala3.

  3. Scala Times Issue #387

    Will Scala 3 be your new favorite language?. Programming with Functions #8: Monads. Part 5 - ZIO.access - Getting Started with ZIO in Scala3. 12th ACM SIGPLAN Scala Symposium Call for Papers. ZIO Hackathon, Oct 29th - 31st (CET).

  4. Scala Times Issue #386

    Scala 3: Macros. 5 Key Lessons from Functional Programming in Scala. OAuth2 Scala application with sttp-oauth2, part 1 - Dev notes. Scala 3 Tech Report by SoftwareMill. Top Link of June: Scala 3 goodies for Scala 2 developers.

  5. Scala Times Issue #385

    Scala 3 Tech Report. ZIO: Introduction to Fibers. Problem: automatic coloring of effect monads in dotty-cps-async. Scala 3: Anti-Givens. (re)constructing sequences with Alternative.

  6. Scala Times Issue #384

    How to write a fire shader. Scala 3 goodies for Scala 2 developers. Composable Scala Matchers: Introduction. Writing an Interpreter From Scratch. Destroy your foldLeft with traverse and State - Scala tutorial.

  7. Scala Times Issue #383

    Existential Crisis: Implementing MapK in Scala 3 . What is ZIO and should you learn it?. Zymposium, June 18th (PDT). ZIO Hackathon, Oct 29th - 31st (CET). ScalaCon, November 2nd - 5th.

  8. Scala Times Issue #382

    Cats: Essential Type Class Hierarchy, Explained. Debugging and Observing Your Scala Code. Programs as Values, Part III: Explicit Control Flow. Programming in Scala Fifth Edition . Favor composition over inheritance in Scala3 with exports!.

  9. Scala Times Issue #381

    Top Level Exports in Scala3. Death of Blocker: blocking in Cats Effect 3 - Scala tutorial. Functional Scala, Dec 2nd - 3rd.

  10. Scala Times Issue #380

    Scala 3 Hello, world!. Scala 3 macros tips & tricks. Build your own refinement types in Scala 3. How To Implement Streaming Microservices Using ZIO and Kafka. How to successfully manage a ZIO Fiber’s lifecycle.

  11. Scala Times Issue #379

    Scala 3 is here!. New Online Course: Effective Programming in Scala. Image editing with Comonads. Generalized Algebraic Datatypes in Scala 3. Kind Projector Migration.

  12. Scala Times Special Scala 3 Issue

    Starting with Scala. Programming in Scala, Fifth Edition. Scala 3 Tech Report. Automatically Deriving Typeclass Instances in Scala 3. Starting with Scala 3 macros: a short tutorial.

  13. Scala Times Issue #378

    From Highschool to Teaching Scala. Rust for the Seasoned Scala Developer. Bring gRPC payloads and domain models closer with ScalaPB transformations. Flog: a functional logger for Scala. Opaque Type Alias in Scala 3.

  14. Scala Times Issue #377

    Typeclasses in Scala 3. Scala 3 Release Party - find out how it went!. Typelevel Discord migration. Scalabase, May 14th. ScalaCon, May 18th - 21st. and Nov. 2nd - 5th.

  15. Scala Times Issue #376

    Cats Effect 3 - Introduction to Fibers. Bintray to JFrog Artifactory migration status and sbt 1.5.1. Anomaly / outlier detection using isolation forest in Scala. Comparing Concurrent Programming Alternatives. Scala 3: Safer Pattern Matching with Matchable.

  16. Scala Times Issue #375

    A ZIO cheatsheet. Programming in Scala, Fifth Edition. Dealing with Optional Values. Best Features of Scala 3 for Scala.js. ZIO Meetup SF, April 22nd.

  17. Scala Times Issue #374

    Image editing with Monads. Fire-and-Forget in Cats Effect. Programming in Scala, Fifth Edition. Scala 3: Extension Methods. The Scala3 feature I'm most excited about!.

  18. Scala Times Issue #373

    Context is King. How to build an Android app in Scala 2.13. Revisiting Scala Native performance. Scala 3 in sbt 1.5. Programming in Scala, Fifth Edition.

  19. Scala Times Issue #372

    Using Cats Effect Resource in Non-Functional Contexts. Cats Effect · The pure asynchronous runtime for Scala. Figuring out Scala functional programming libraries. Scala 3: Infix Operator Notation. Building a transportation cloud with microservices.

  20. Scala Times Issue #371

    Introducing ZIO Http. Automatic UI generation with Scala 3's type class derivation. Scala is a Maintenance Nightmare. The Tagless Final Pattern in Scala. Scala3-migrate: a tool making it easier to migrate to Scala 3.

  21. Scala Times Issue #370

    The importance of Scala.js. Scala on Android. JDK 16's Top 5 for Scala. Many happy early returns. Zio quick read: Extracting the executor for a service.

  22. Scala Times Issue #369

    Tapir serverless: a proof of concept. Writing kubectl plugins with ZIO K8s. The future of Scaladoc. GSoC 2021 Here we come!. Programming in Scala Fifth Edition - New Release for Scala 3.

  23. Scala Times Issue #368

    Scala 3 Tech Report. Tuples bring generic programming to Scala 3. Scala Cats Invariant Functor. Lean for Scala programmers. Structuring Services with ZIO and ZLayer.

  24. Scala Times Issue #367

    The Coralogix Operator: A Tale of ZIO and Kubernetes. Introducing the lihaoyi-scala Github Organization. Why Are Fibers Fast?. Implementing a CountDownLatch (async and dirty). Value Classes in Scala.

  25. Scala Times Issue #366

    GraphQL Overview  -  Part2  -  Libraries. Scala's List has a Secret. Preventing Version Conflicts with versionScheme. Scala 3 Survey: The Conclusion. Upgrade your Tagless Final with Tofu.

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