Understanding Scala Variance

If an AuthedUser is a User, when is an F[AuthedUser] an F[User]? Or the reverse? The answer lies in variance. This talk discusses Scala’s four types of variance, and dives into some of the design issues that guided the development of Cats.
Ross Baker (@rossabaker)

Scala Macros - Episode 9 - Turning a Trait Into an HTTP Server

In this video we will see how we can convert what we parsed out of of our trait/def/param, and use that to parse our simple HTTP request.
Kalin Does Code

workflows4s

This release is packed with major improvements and new features! Workflow ID rework, ForEach operator, and many many more changes.
workflows4s contributors

ScalaSpringExperiment

A Spring with Scala 3 Sample App
Nick Fellows (@Halfhp)

LLM4s Dev Hour – Sundays @ 9am London Time

Just finished another great hour of mob programming. We’re now doing this every Sunday — 60 minutes of live coding, debugging, and learning together in public.
LLM4s

Scala Days, Aug 19th - 21st, Lausanne, Switzerland

Leaders from Scala User Groups and global communities, students, and language contributors will gather to discuss academic research, use cases, and visionary projects for a two-day, action-packed event.
Scala Days (@scaladays)

The Scala Workshop, Oct 13th, Singapore

The Scala Workshop is the continuation of the Scala Symposium, providing a forum for researchers and practitioners to discuss the design, implementation, and applications of the Scala programming language. Topics include language features, compiler internals, type systems, libraries, tools, and industrial applications.
EPFL

DEVJVM, Oct 25th, Barranquilla, Colombia

A conference uniting Java, Kotlin, and Scala developers.
DEVJVM

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