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March 2nd, 2017, ISSUE 159

READING

Ad hoc polymorphism in Scala for the mere mortals

Learn why the Typeclass Pattern is such a powerful tool.
Andrey Skorikov
Customizing Circe's auto generic derivation

In this post, I build a simple model with sealed traits, serialize it to JSON using Circe, and show how to customize encoding using Shapeless.
Mateusz Bilski (@mateuszbilski)
A Simple Akka Cluster Application

A simple cluster application as it’s going to be the foundation of upcoming posts.
Efe Kahraman (@efeuska)
Extending RequestContext in akka-http for fun and profit

Sometimes it’d be nice to put some additional information into RequestContext to have it available at all times during request processing.
Marcin Rzeźnicki
Typeclass encoding in Dotty

A discussion about ideas on how to encode type classes.
dotty contributors
Scala 2.13 Collections Rework

Current vision of all the upcoming changes.
Scala Center
Four ways to escape a cake

Once you define something in a trait to be mixed in, to produce another reusable module that calls that thing, you must define another trait, and so must anyone using your module, and so on and so forth. You effectively become “trapped in the cake”.
Stephen Compall (@S11001001)

EVENTS

Scala Italy 2017 Call for Paper

Apply if you'd like to speak on May 13th, 2017. CFP ends March 5th.
Scala Italy (@ScalaItaly)
ScalaSwarm CFP

Apply if you'd like to speak in Portugal, Porto, June 20-23th 2017. CFP ends April 8th.
ScalaSwarm
Scala Up North 2017 CFP

Submit your talk before March 24th if you'd like to speak on July 21-22 in Vancouver, Canada.
Scala Up North

RELEASES

Akka Http 10.0.4

This release is a monthly maintenance release which contains mostly bug fixes and smaller improvements.
Akka Team
Slick 3.2.0

Identical to RC1, this is the final and long awaited release of 3.2.0, with Scala 2.12 support and a lot of other changes.
Slick Team
knobs 4.0.30

A fresh release of knobs for Scala 2.10, 2.11, 2.12 through scalaz 7.1 and scalaz 7.2.
knobs contributors
chart4s

A library for drawing charts from Scala through S3.js.
Pishen Tsai (@pishen)
scalafix 0.3.1

A Scala code rewriting tool and library. The long-term goal of the project is to automate migration from Scala 2.x to Dotty, a next-generation Scala compiler.
Ólafur Páll Geirsson (@olafurpg)
scala-js-example

Minimal but complete web application with a Postgres database. Built using Scala.js and Docker.
Matthias Braun
twitter4s 5.0

Lots of improvements like rate limit support and easier client initialisation.
Daniela Sfregola (@DanielaSfregola)
akka-zk

ZooKeeper client as a reactive Akka stream.
Radek Gruchalski
helm

A native Scala client for interacting with Consul.
helm contributors
goggles

a thoroughly pleasant Scala lens DSL built on Monocle.
Ken Scambler (@KenScambler)
Xylophone

An XML library for Scala.
Xylophone contributors

VARIA

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