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December 31st, 2020, ISSUE 359

READING

Implementing Type classes in Scala 3

We saw in Scala 3 a type class’s implementation is expressed through a given instance definition, which is supplied as an implicit argument alongside the value it acts upon. The type class solution takes more effort to set up, but is more extensible: instances for type classes can be defined anywhere.
Ayush Mittal
Finite-State Machines + FS2 streams: A match made in heaven

To demonstrate it, I’ll make up a compelling problem to solve and we will get to the final solution step by step.
Gabriel Volpe (@volpegabriel87)

VIDEOS

Scala Compiler Options, Fatal Warnings and Linting Guide

In this video we are going to learn all there is to know related to scalac options related to warnings and linting. Where to find them, how to configure them, how to silence them and much more.
DevInsideYou (@DevInsideYou)
ZLayers by example

In this video, you will learn how to use zio and ZLayers. The example is to implement a program that depends to a service Show that provides a display method.
Wiem Zine (@WiemZin)
Scala 3 type classes

In this episode, I discuss Scala 3 extension methods and how to use them in the implementation of a cut down version of the Scala standard library Numeric type class.
Functional Justin (@justinhj)

EVENTS

Scala Love CFP

Scala Love takes place on February 13th, from 9:00 AM to 11:00 PM Central European Time (12:00 AM Midnight to 2:00 PM Pacific Standart Time). We are going to have two tracks: one for speakers based in Europe/Asia and one for speakers based in America! CFP closes at January 10, 2021 23:59 UTC January 11, 2021 00:59 CEST (Local)
Scala Love (@scala_love)
Lambda Days 2021, 16th - 19th February, Virtual Event

Grab the early birds tickets before Jan 14th! Don't forget to check the Diversity Scheme - we have a pool of tickets to be distributed among participants from groups underrepresented in IT.
LambdaDays (@LambdaDays)





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    5 Blogs for Scala's Birthday. Monocle 3 Roadmap. Higher-kinded data in Scala. Objects and Companions in Scala. Essential Effects, 27th-29th January, Online Event.


  2. Scala Times Issue #361

    Scala 3: Dependent Types, Part II. Configuring and suppressing warnings in Scala. Threading best practices in Cats Effect. Scala 3 Metaprogramming by Example by Adam Warski. What the Functor?.


  3. Scala Times Issue #360

    Scala 3: Dependent Types, Part I. Publish Scala 2 and Scala 3 macros together. Concurrent state machines. Wire Signals - Yet Another Event Streams Library. Scala Love CFP.


  4. Scala Times Issue #359

    Implementing Type classes in Scala 3. Finite-State Machines + FS2 streams: A match made in heaven. Scala Compiler Options, Fatal Warnings and Linting Guide. ZLayers by example. Scala 3 type classes.


  5. Scala Times Issue #358

    VirtusLab’s Scala 3 cooperation update. Scala 3.0.0-M3: developer's preview before RC1. How to Use Thread.sleep Without Blocking on the JVM. New in Scala 3. Scala Love CFP.


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    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.


  15. 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.


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    SoftwareMilling around OSS - Scala Love. More Intuition on Optics. Type-Level Programming in Scala, Part 2. An Introduction to Functional Design. VimtelliJ: All the best of Vim in IntelliJ.


  24. Scala Times Issue #339

    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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    ZIO 1.0 Released. Retry Failing Tasks with Cats and Scala. An Intuition for Optics. Evoneering - Scala Bootcamp. How Does "20 seconds" Work in Scala?.


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