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October 22nd, 2020, ISSUE 349

READING

Generic IOApp alternative

This is a simple and generic IOApp and TaskApp replacement. For those instances in which you want to work with F[_] and not IO or Task, even in main apps.
Alexandru Nedelcu (@alexelcu)
Let's build a Scala mock library

Building a mock library was a great exercise that taught me a lot about Scala. It’s an experience that forced me to think a lot more about how Scala’s type system works – and I definitely feel like I understand the language much better as a result.
Sid Shanker (@sidpshanker)
How To Make Integration Tests Less Flaky

Using this pattern, services declare their dependencies in a docker-compose and integration tests will become less flaky.
Adam Gordon Bell (@adamgordonbell)
dotty+scala.js+async: interesting options

With the soon-to-be-released dotty 3.0.0-M1 (2020 Q4) and scala.js support rapidly improving (thanks @sjrd and team!), we can soon use scala.js with dotty.
aappddeevv
Option  - the null of our times

Things I would have told my younger-self about using Option in Scala.
Adam Gajek (@adam_gajek)
Top Link of September: Polynote, A better notebook for Scala

The most visited link last month!
Vincent Brule (@BruleVincent)
10 % discount for Zionomicon

A new book explaining all the mysteries of Zio. Use promo code "scalatimes" to get a discount!
Ziverge (@zivergetech)

VIDEOS

Why Scala?

A gentle introduction which may help you get the best answer to this fundamental question.
Adam Warski (@adamwarski)
Tagless Final - 4 error channel encodings (Error Handling - Part 1)

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 1/2
DevInsideYou (@DevInsideYou)

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)
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.
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.
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

prox

A purely functional Scala library for working with system processes.
Daniel Vigovszky (@dvigovszky)
patterns-serverless-scala-minimal

Minimal setup for starting with serverless Scala on AWS Lambda using AWS CDK for deployment.
Christian Kjær (@codetalkio)
TranzactIO

ZIO wrapper around Scala DB access libraries
Gaël Renoux
scala-typesafeequals

A macro-based type safe equality library for scala 2.11/2.12/2.13.
Eric Peters (@ericpeters)
dhall-generic

Dhall generic decoder for Scala.
Jichao Ouyang (@oyanglulu)
Scala.js 1.3.0

This release brings one of the most awaited features for Scala.js: module splitting support! It is now possible to split the generated .js file into multiple modules, to optimize download size in multi-page applications or speed up incremental bundling. In addition, this release contains a number of new methods and classes in the JDK implementation, among which the higher-order methods of the java.util collections, and the locale-sensitive overloads of String.toLowerCase, toUpperCase and format.
scala.js contributors (@scala_js)
Kite

Kite adds AI powered code completions to your code editor. Supports Scala with many editors.
Kite (@kitehq)





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