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May 14th, 2021, Special Scala 3 issue


Release 3.0.0

Scala 3.0.0 FINAL is here! After years of development, the project that was once known as Dotty, is now available. The ecosystem is pushing full steam ahead as we speak, releasing all the libraries that we know and love from Scala 2, so that you could start experimenting and developing using all of the goodies that come with the new release.

We're taking this occasion to release a special issue, with some Scala-3-related links from previous ScalaTimes issues, introducing new features or detailing out migration paths. Keep in mind this is only the tip of the iceberg, you can find much more in ScalaTimes archives!

Congratulations to Martin Odersky, Nicolas Stucki, Guillaume Martres and the rest of the EPFL & ScalaCenter teams!

The Scala Team (@scala_lang)
Scala 3

The best place to start your adventure with Scala 3 / Dotty: extensive documentation, migration information, download links.
Scala Team (@scala_lang)
Starting with Scala

How to start with Scala? What IDEs are available? Which books to read, and which blogs to follow? Your one-place-stop if you are starting with Scala.
SoftwareMill (@softwaremill)
Programming in Scala, Fifth Edition

THE Scala book, updated for Scala 3.
Artima, Inc. (@ArtimaInc)
Scala 3 Tech Report

A summary of developers' expectations for Scala 3 and their view on the future of Scala, based on the results of survey that we've conducted among 671 respondents.
SoftwareMill (@softwaremill)
Annoying things in Scala 2 that’ll be (mostly) gone in Scala 3

Scala 2 is great, but occasionally some things are annoying. An introduction to some of the changes in Scala 3.
Mikołaj Koziarkiewicz (@mikolak_net)
Automatically Deriving Typeclass Instances in Scala 3

A lot of work is done by the Scala compiler, and even more work can be done by writing your own typeclass derivation!
Noel Markham (@noelmarkham)
Starting with Scala 3 macros: a short tutorial

Scala 3 brings a whole new metaprogramming experience. How to start writing your own inlines and macros?
Adam Warski (@adamwarski)
Opaque Type Alias

What are Opaque Type Aliases, and how to use them for domain modelling?
Baeldung (@baeldung)
Context is King

What are Scala 3 context functions, and how can we leverage them? How do they play with Dependency Injection?
Adam Warski (@adamwarski)
Scala 3 in sbt 1.5

How to use Scala 3 in SBT?
Adrien Piquerez (@adrienpi2)
Match Types in Scala 3

Introducing one of Scala 3's new features: match types.
Daniel Ciocîrlan (@rockthejvm)


Get more clarity with opaque types

Types are a programmer's best friend. In Scala 3, there's something new for this purpose - opaque type aliases. What do they bring to the table?
Magda Stożek (@magdastozek)
Scala 3 Metaprogramming by Example

Keynote from Functional Scala 2020 - live-coding a couple of metaprogramming examples using Scala 3
Adam Warski (@adamwarski)
Implicits in Scala 3 – Explicitly for the People?

Implicits were the subject of a considerable overhaul of Scala 3. What changed, and is it for the better?
Mikołaj Koziarkiewicz (@mikolak_net)
Why Scala?

A 15-minute introduction: Why Scala?
Adam Warski (@adamwarski)
Scala 3 playlist by RockTheJVM

A lot of video content on what's new in Scala 3!
Daniel Ciocîrlan (@rockthejvm)

  1. 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.

  2. 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!.

  3. Scala Times Issue #381

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

  4. 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.

  5. 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.

  6. 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.

  7. 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.

  8. 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.

  9. 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.

  10. 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.

  11. 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!.

  12. 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.

  13. 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.

  14. 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.

  15. 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.

  16. 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.

  17. 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.

  18. 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.

  19. 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.

  20. Scala Times Issue #365

    Coding Adventures with Party Parrot Game . Scala Cats Contravariant Functors. From First Principles: Why Scala?. Idiomatic Error Handling in Scala. Stop Letting Your Tests “Make” Your Luck.

  21. Scala Times Issue #364

    Why we need yet another Akka Persistence plugin?. Match Types in Scala 3. A Metals Retrospective (Part 1) · Metals. Making the Spark DataFrame composition type safe(r). Type driven API development using Scala and Tapir.

  22. Scala Times Issue #363

    How to Sort Lists in Scala with Tail Recursion. Image editing with Functors. Tail Recursive Functions (in Scala). Algebraic Data Types (ADT) in Scala. Ep 6: Functional error handling with applicative in Scala 3.

  23. Scala Times Issue #362

    5 Blogs for Scala's Birthday. Monocle 3 Roadmap. Higher-kinded data in Scala. Objects and Companions in Scala. Essential Effects, 27th-29th January, Online Event.

  24. Scala Times Issue #361

    Scala 3: Dependent Types, Part II. Configuring and suppressing warnings in Scala. Threading best practices in Cats Effect. Scala 3 Metaprogramming by Example by Adam Warski. What the Functor?.

  25. Scala Times Issue #360

    Scala 3: Dependent Types, Part I. Publish Scala 2 and Scala 3 macros together. Concurrent state machines. Wire Signals - Yet Another Event Streams Library. Scala Love CFP.

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