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May 21st, 2021, ISSUE 379

READING

Scala 3 is here!

After 8 years of work, 28,000 commits, 7,400 pull requests, 4,100 closed issues – Scala 3 is finally out.
Anatolii Kmetiuk (@AKmetyuk)
New Online Course: Effective Programming in Scala

Available on Coursera. The Effective Programming in Scala course aims to teach non-Scala programmers everything they need to become professional Scala 3 programmers in six weeks. Now updated to Scala 3.
Julien Richard-Foy (@julienrf)
Image editing with Comonads

Flatmapping is fun, but have you tried coflatmap?
Adrian Salajan (@adrisalajan)
Generalized Algebraic Datatypes in Scala 3

I'm recently migrating some libs and projects to Scala 3, I guess it would be very helpful to me or anyone interested to learn some new functional programming features that Scala 3 is bringing to us.
Jichao Ouyang (@oyanglulu)
Kind Projector Migration

Dealing with type lambdas and migrating to Scala 3? This guide will provide all necessary information.
Coursier cheatsheets

All the useful commands collected into convenient cheat sheets.
Yadu Krishnan (@yadukrishnank)

VIDEOS

Scala Testing With ScalaTest: Testing Styles for Beginners

In this video, we look at how to write tests in various styles with Scala and ScalaTest, and we'll understand how different structures work, what they mean, and what purpose they serve, so you can use them well.
Daniel Ciocîrlan (@rockthejvm)
How to organize imports in Scala with Metals and/or Scalafix

In this video we are going to learn how to organize imports in Scala with either Metals and/or Scalafix. As a by-product we are also going to learn about a couple of VS Code tricks.
DevInsideYou (@DevInsideYou)
What I learned from using Scala Metals for 2 years!

In this video I'm going to share what I've learned in the last 2 years of using Metals. In particular we will focus on troubleshooting tips and tricks.
DevInsideYou (@DevInsideYou)

EVENTS

Functional Scala 2021

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)
Functional Data Modeling (SF - Bay Area Edition), May 24th - 28th

In this course, developers will learn how to use functional Scala to construct simple, precise, and flexible models of any business domain. Use this link to get a 20% discount for Scala Times readers! We are also offering another special discount for all 7 courses in a package of $3000. Message sandra@ziverge.com.
John A. De Goes (@jdegoes)
Scala 3 for Scala 2 Developers (SF - Bay Area Edition), Jun 21st - 25th

In this course, developers who are already familiar with Scala 2.x will get a high-speed introduction to all the changes coming in Scala 3, including semantic changes, syntactic changes, new features, and dropped features. Use our link to get a 20% discount for Scala Times readers!
John A. De Goes (@jdegoes)
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)
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)
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)

RELEASES

Shapeless 3.0

Ready for Scala 3!
Miles Sabin (@milessabin)
Scala 2.13.6

TASTy Reader support for Scala 3.0.0, splain compiler plugin integrated into the compiler, and a fix for escaped double quotes in string interpolations.
scalafmt 3.0.0-RC3

A large set of updates towards the final 3.0 release.
scalafmt contributors
Metals 0.10.3

This release brings support for the long awaited Scala 3.0.0 version together with some important improvements.
Metals contributors
sbt 1.5.2

A patch release with some bugfixes.
sbt contributors
zio-pulsar

Apache Pulsar client for Scala with ZIO and ZIO Streams integration.
Jakub Czuchnowski (@jczuchnowski)
Alpakka 3.0.0

In Alpakka 3.0.0, we no longer build against Akka 2.5.x or publish Scala 2.11 artifacts. Most libraries Alpakka uses are updated to their latest patch versions. There's also a rewritten Google BigQuery connector, a google-common module, and a bunch of new features and fixes.
Akka Team (@akkateam)





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