This week in #Scala (Jun 29, 2026)

Welcome to the new edition of #ThisWeekInScala!

This blog keeps you updated with the latest Scala news.

New Content

• Improving Scala’s docs and website

• Scala Codebase Security Audit Complete

• Scala collections: how to pick the right one

• The Scala Library Author’s Dilemma

• Scala Was an Experiment That Changed Programming

• How Cats Changed the Way Marco Think About Behavior in Scala

• Reducing scaladoc file size with sbt-salad-days

• Sage: a Redis & Valkey client for Scala 3

• orca—Deterministic, AI-driven development flows.

• skunk-crypt—Transparent, application-level AES-GCM encryption for PostgreSQL columns — as drop-in Skunk codecs

• Project Valhalla, Explained: How a Decade of Work Arrives in JDK 28

Events

• The Scala Workshop CFP, Jun 29th, Brussels, Belgium

• J On the Beach, Oct 29th - 30th, Malaga, Spain

• Lambda World, Oct 29th. - 30th, Malaga, Spain

• Scala Days, Oct 12th - 13th, Berlin, Germany

Releases

• Scala 3.8.4 is now available!

• hearth 0.3.1

• refined-compat 0.1.0

• Announcing Scala.js 1.22.0

• sbt 1.12.13 released

• kindlings 0.2.0

• YAES 0.22.0

Learning Materials

• Scala: Learning Roadmap

• Online Courses (MOOCs) from The Scala Center

• Learn Scala with Alvin Alexander

• Functional Programming in Scala JetBrains course

• Scala 3 Metaprogramming Learning Resources

• The Functional Programming in Scala Course Is Out!

• Functional Declarative Design: A Comprehensive Methodology for Statically-Typed Functional Programming Languages

• Get Programming with Scala by Daniela Sfregola (30% off)

• Play for Scala (30% off)

• Grokking Functional Programming (30% off)

• Functional Programming for Mortals (pay as much as you want)

• Essential Effects by Adam Rosien (20% off)

• Programming in Scala, Fifth Edition

• Functional Event-Driven Architecture: Powered by Scala 3 is now 100% complete

• Zionomicon (code is thisweekinscala)

• Supercharge Scala Future | FP-Tower (50% off)

• Practical FP in Scala is now free