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October 29th, 2020, ISSUE 350

READING

Designing tapir’s WebSockets support

It is now possible to describe a web socket endpoint, expose it as an akka-http or http4s server, interpret as an sttp client, or generate AsyncAPI documentation!
Adam Warski (@adamwarski)
remote caching sbt builds with Bintray

We can liberate the Zinc state from machine-specificity and time, and become the foundation we lay towards building incremental remote caching for Scala.
Eugene Yokota (@eed3si9n)
BSP Support in sbt 1.4

As we will see in more details, BSP in sbt improves the integration of sbt inside IDEs and code editors. It provides the user with a unified working environment.
Scala Center (@scala_lang)
Streaming With Probabilistic Data Structures: Why & How

I will use KafkaStreams for demonstrations along the way, but the concepts explored here can be applied in virtually any streaming library.
Eliav Lavi (@eliavlavi)
Scala 3 Migration guide

An evolving guide to support the migration to Scala 3
Scala Center (@scala_lang)
ScalaZONE - Scala 3 Programming Language Courses

ScalaZONE gives you the easiest way to learn object-oriented and functional programming in one concise, high-level language regardless of your level of proficiency — from beginner to advanced.
VirtusLab and Propensive
Zionomicon

Master the dark art of creating scalable, type-safe, concurrent apps with ZIO. Use promo code "scalatimes" to get a 10% discount!
Ziverge (@zivergetech)

VIDEOS

Tagless Final - 4 error channel encodings (Error Handling - Part 2)

In this video we will see 4 possible ways to encode the 2 common error channels for business as well as technical errors. Among them are the mtl and the bifunctor encodings. This is part 2/2.
DevInsideYou (@DevInsideYou)
Akka Typed: Stateful and Stateless Actors

This video is for people getting started with Akka Typed. We explore some of the basic principles of typed actors, how to describe them by their behavior, and how we can keep mutable state inside Akka actors. Finally, I'll show you a technique to turn actors with mutable state into "stateless", functional actors in Akka.
Daniel Ciocîrlan (@rockthejvm)
Val vs Def functions in Scala

Functions are the centrepiece of functional programming. We need to have a strong understanding of how they work in Scala before we can move on to more powerful concepts. So, today we're going to focus on the difference between `Val` and `Def` functions.
Julien Truffaut (@JulienTruffaut)

EVENTS

Scale By the Bay, November 12th - 14th, online event

Starting at 3:30 PM CET. Use promo code "FUNCTIONAL" to get a 10% discount for our readers!
Scale By The Bay (@ScaleByTheBay)
Functional Data Modeling, November 18th - 19th, Online training

In this course, developers will learn how to use functional Scala to construct simple, precise, and flexible models of any business domain. Use code "ScalaTimes10" to receive 10% off at the checkout.
John A. De Goes (@jdegoes)
Essential Effects, November 18th-20th, online event

Essential Effects teaches how to safely create, compose, and execute effectful Scala programs using the Typelevel cats-effect library, and how to integrate these concepts and techniques into your projects. The course will take place online as three 4-hour sessions with breaks, 9am-1pm PST (UTC-7). Use discount code 'scalatimes' for a discount!
Inner Product (@InnerProductLLC)
ZIO Hackathon, November 20th-21st, online event

Attendees of ZIO Hackathon 2020 will be able to attend talks on ZIO projects from leading open source contributors, as well as receive expert mentorship in contributing features, bug fixes, and documentation enhancements to the ZIO ecosystem of libraries. Every Contributor to the ZIO library during the ZIO Hackathon will receive this collectible T-shirt!
Ziverge (@zivergetech)
Functional Scala, December 3th-4th, London

Learn the critical topics you need to excel as a Scala developer, and celebrate the Scala programming language and community. Every ticket holder to Functional Scala 2020 will receive an all-day Scala 3 course by John de Goes and a collectible T-shirt!
Ziverge (@zivergetech)
Scala 3 for Scala 2 developer, December 8th - 10th, Online training

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 code "ScalaTimes10" to receive 10% off at the checkout.
John A. De Goes (@jdegoes)
Functional Scala Megapack (3 workshops)

Functional Design + Functional Data Modeling + Scala 3 for Scala 2 developers. Use our special link to get a 15% discount!
John A De Goes (@jdegoes)

RELEASES

http4s-pac4j

Security library for http4s
http4s-pac4j contributors
rocket-chip

This repository contains the Rocket chip generator necessary to instantiate the RISC-V Rocket Core.
rocket-chip contributors
cats-effect 3.0.0-M2

The most significant changes in this release are undoubtedly the introduction of auto-yielding semantics in fiber evaluation and the final removal of UnsafeRun and related introduction of Dispatcher.
cats-effect contributors





  1. Scala Times Issue #350

    Designing tapir’s WebSockets support. BSP Support in sbt 1.4. Streaming With Probabilistic Data Structures: Why & How. Scala 3 Migration guide. ScalaZONE - Scala 3 Programming Language Courses.


  2. Scala Times Issue #349

    Generic IOApp alternative. Let's build a Scala mock library. How To Make Integration Tests Less Flaky. Option  - the null of our times. Top Link of September: Polynote, A better notebook for Scala.


  3. Scala Times Issue #348

    Java 15 through the eyes of a Scala programmer. Functional Design, October 20th - 22nd, Online training. Scale By the Bay, November 12th - 14th, online event. Functional Data Modeling, November 18th - 19th, Online training. ZIO Hackathon, November 20th-21st, online event.


  4. Scala Times Issue #347

    A short guide to Blocker. Using: Did they forget something?. The assignment operator is broken!. Attending a hackathon with Scala and Akka (Streams) on Microsoft Azure. Programming Scala, Third Edition.


  5. Scala Times Issue #346

    Getting Started with Knative in Scala. Tagless Final - Part 12 - delivery-http-http4s (The Big Rewrite). Programming in Scala for beginners - week 5: classes. Eyjafjallajökull Lecture 2019. Scala 3: Enums.


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  10. Scala Times Issue #341

    Concurrency In Scala with Cats-Effect. Scala, React, and SSR (part 1). More Algebra of Algebraic Data Types. Akka HTTP 10.2 Release - Q/A with the Akka team. Type-Level Programming in Scala, Part 3.


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    Scala Knowledge Bits Archives. Functional Effects with ZIO. Experiment with Loom. Auto publish sbt plugin from Travis CI. Scala String Interpolation.


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