A free, once-weekly Scala news flash. Easy to unsubscribe. Goes out every Thursday.
June 13th, 2019, ISSUE 278

READING

sttp, curl, request logging and functional programming

A brand-new addition to sttp is the ability to convert the description of an HTTP request to a curl command.
Adam Warski (@adamwarski)
Counting to infinity at compile time

This part focuses on performance and brings a more robust solution than Nat described in the previous part.
James Phillips
Vectos - A functional ecosystem

In this post I would like to go over some of the tech I used to build a new micro-service at DHL and why these technologies and methodologies could be interesting as well for you.
Mark De Jong (@mark_dj)
Scala 2.13.0 for the Akka family

We are pleased to announce that most members in the Akka family are available for Scala 2.13 as of now.
Akka team (@akkateam)
The place of applicative style in today's Scala

Have you ever used the <*> operator from Apply typeclass, except just to try to understand it?
Oleg Pyzhcov (@oleg_pyzhcov)
This Month We've Learned - May’19 

Some interesting discoveries around  Scala implicits, multi-stage Docker builds, handy command-line tools.
SoftwareMill (@softwaremill)
Triplequote interview with Miles Sabin

A reflection on Typelevel Sustainability Program, Scala 3.0 and other topics.
Triplequote (@triple_quote)
How to work with Subprocesses in Scala

This tutorial will walk through how to easily work with such subprocesses from the Scala programming language, to allow you to interact with the rich ecosystem of third-party tools and utilities that subprocesses make available.
Li Haoyi (@li_haoyi)

PRESENTATIONS

Homegrown Scala Collections - Part 33 - Ordered Collections

In this video we will mostly talk about Arrays, Strings, Lists and also mention Vectors. We will also pave the way to the upcoming foldRight video.
DevInsideYou (@DevInsideYou)

EVENTS

LX Scala & Reactive, Lisbon, Portugal, 4th - 5th July

Use promo code scalatimes_ to get a 40% discount for our readers!
LX Scala & Reactive (@lx_scala)
CFP for Lambda World, Cádiz, Spain, October 17th - 18th

Deadline for submissions is June 1st.
Lambda World (@lambda_world)
BeeScala, Ljubljana, Slovenia, November 21st - 21rd

Don't miss your ticket for this unique conference!
BeeScala (@BeeScalaConf)

RELEASES

Scala 2.13

Finally, it's here!
Scala contributors
Dotty 0.16.0-RC3

Syntax Change: Type Lambdas, Syntax Change: Wildcard Arguments in Types, Syntax Change: Contextual Abstractions, Polymorphic function types, lazy vals are now thread-safe by default, and many more updates!
Dotty contributors
Kafka lag exporter

Monitor Kafka Consumer Group Latency
Lightbend (@lightbend)
bloop 1.3.0

Bloop is a build server and CLI tool for the Scala programming language developed by the Scala Center. Bloop v1.3.0 is the biggest release of this project to this date.
bloop contributors
Metals v0.6.1 - Radium

The release mostly focused on adding support for the build tools Gradle, Maven and Mill.
Metals contributors

VARIA

Scala Times banners?

Want one? Click here
THE INTERNET
Scala Times stickers?

Want one? Let us know or tweet @scalatimes.
THE INTERNET





  1. Scala Times Issue #278

    Counting to infinity at compile time. Vectos - A functional ecosystem. Scala 2.13.0 for the Akka family. The place of applicative style in today's Scala. This Month We've Learned - May’19 .


  2. Scala Times Issue #277

    Final Free Structures with Subtyping. Exploring the STM functionality in ZIO. The Evolution of a Scala Programmer. How to work with Files in Scala. Top Link Of May: The little gems of Scala standard library.


  3. Scala Times Issue #276

    Small & fast Docker images using GraalVM’s native-image. SystemFw FP blog. IO monad: which, why and how. Counting at compile time. Why I'm Stepping Back from Scalaz.


  4. Scala Times Issue #275

    Tagless unions in scala 2.12. Combine IntelliJ IDEA with Hydra for the fastest Scala development experience. TMWL April’19  - qubits, scripting Google Apps & Scala tricks. Performant Functional Programming to the max with ZIO.


  5. Scala Times Issue #274

    AST playground: recursion schemes and recursive data. Rethinking Streaming Workloads with Akka Streams: Part I. Sharing is Caring!. A Scala tutorial for Java developers. Scala: Useful User Information + Why you should consider the Language.


  6. Scala Times Issue #273

    Community and Communication. Futures Made Easy with Scala. Scala: Useful User Information + Why you should consider the Language. Using 47 Degree's Fetch library with ZIO. Scala Compilation Got 5x Faster With Triplequote Hydra.


  7. Scala Times Issue #272

    The little gems of Scala standard library. Practical fiber safety (and how Concurrent implies Parallel). Typelevel Sustainability Program Announcement. Homegrown #Scala Collections - ScalaCheck / ScalaTest Integration. Alphabet Soup: Lensing, for free.


  8. Scala Times Issue #271

    ZIO & Cats Effect: A Match Made in Heaven. Concurrency is complicated. An introduction to Law Testing in Scala. Celebrating 10 Years of Akka. Alphabet Soup: Type-level transformations.


  9. Scala Times Issue #270

    Akka 2.6 roadmap. Extending MapR Database Queries Using Scala Polymorphic Types. Marvels of functional programming: Composing effects with monads. Traverse your HLists for fun and profit. Did Functional Programming get it wrong?.


  10. Scala Times Issue #269

    Scalar 2019 whiteboard voting. 38 lines of code towards better data validation in Scala. Scala: Internals and Intermediates. Hacker News API Part 5. Scala Ordering Crash Course.


  11. Scala Times Issue #268

    Functional Hangman with ZIO. Scala or Go: Tastes Great or Less Filling?. An Example of Free Monads and Optimization. Homegrown Scala Collections - Part 29 - Are Views Typeclasses?. Scalar, Warsaw, Poland April 5th - 6th.


  12. Scala Times Issue #267

    Bloop’s compiler performance is ~29% faster than SBT. Fourth batch of Scala 3 SIPs. Functional Hangman with ZIO. Scala: Understanding Variance. Fun with mutually-recursive typeclass resolution.


  13. Scala Times Issue #266

    The RedMonk Programming Language Rankings: January 2019. A monad is not a burrito. Joins in Apache Spark - Part 3. Scala sbt Project Directory Structure. Scala Snippets #1: Instantiable Implicits.


  14. Scala Times Issue #265

    Testing Incrementally with ZIO Environment. Finally Tagless - Not Quite Dead Yet. Functional Testing with Tagless-Final. Monad Transformers aren’t hard!. The Functional Scala Concurrency Challenge.


  15. Scala Times Issue #264

    Final Tagless seen alive. Effectful Episode with John de Goes. State vs Stateful Actor. Phil Bagwell Nominations. Introduction to Akka Streams.


  16. Scala Times Issue #263

    Describe, then interpret: HTTP endpoints using tapir. Vue.js with Playframework. Mu-RPC: defining messages and services. Validate Service Configuration in Scala. Modern Systems Programming And Scala Native With Richard Whaling.


  17. Scala Times Issue #262

    Is your Scala object always a singleton?. Freer doesn’t come for free. Maintaining Binary Compatibility in Scala. Anatomy of functors and category theory. A little Scala 'sed' class.


  18. Scala Times Issue #261: from Scala with love

    Aecor — Purely functional event sourcing in Scala. Part 5. Homegrown #Scala Collections - Foldable Maps. Kubernetes Liveness and Readiness Probes Revisited. Streams and Resource Safety | Akka. Assemble messages from Akka Actors.


  19. Scala Times Issue #260

    Cats Ecosystem Community Survey 2018 Results. Thread Pool Best Practices with ZIO. Purely functional parallelism in Scala. Finatra meets Ammonite. Typed Supervision: why the changes?.


  20. Scala Times Issue #259

    State of Scala compilation time in 2018. Low-memory symbol indexing with bloom filters. Finally: Top-level Definitions. Why you should think about functional programming. Toward a polyglot James server….


  21. Scala Times Issue #258

    Scala Days 2019 - Celebrating Collaborative Success. Scala community build grows, adds Scala 2.13 and JDK 11. Type-checked triple equals: Scala test. Using Scala Plugins From Gradle. Exploring Explicit Nulls in Dotty.


  22. Scala Times Issue #257

    High-Performance Functional Programming Through Effect Rotation. Trampolines for Everything. This month at SoftwareMill we’ve learned — December’18. A Guide to Scala Collections: Exploring Monads in Scala Collections. Spark Custom Stream Sources.


  23. Scala Times Issue #256

    Where is the llama for FS2?. Scala Best Practices - Foreword. Aecor - Purely functional event sourcing in Scala. Part 4b. Postgresql from Spark, how to query?. Error Handling in Akka Actor (with Future).


  24. Scala Times Issue #255

    ADT through the looking glass - lenses, prims and other optics. Hpc with scala and akka Actors. Scala Type Classes - The Name Printer. Evolutionary Algorithms on the JVM via Scala  -  a minimal introduction. Aecor - Purely functional event sourcing in Scala. Part 4a.


  25. Scala Times Issue #254

    Cats Ecosystem Community Survey 2018. Scala Developer Suvey Results 2018. Minutes of the 11th meeting of the Scala Center, Q4 2018. Software as a Reflection of Values With Bryan Cantrill. Dotty: An Alternative to Implicits.


★★5000★★
------------
SUBSCRIBERS!
------------
Organizing an event?
Promote it with
Scala Times.
The Scala Times reader?
Get a banner!
Got a tip? Send it in!
Follow us on Twitter.
Curated by SoftwareMill.
We are hiring.
And taking on projects.