Functional Roundup for April 12, 2017

• by Maureen Elsberry
• •
• April 12, 2017
• •
• functional roundup• scala• sbt• cats• http4s• scala ide• clojure
• |
• 4 minutes to read.

Here are some of the latest updates, projects, talks, articles, and events in the Functional Programming community:

The sbt team has unveiled the latest technology preview for sbt 1.0 with v0.13.15.

The release features a variety of improvements, bug fixes, and removes the Maven version range. Some of the highlights include:

• Preliminary JDK 9 support
• Adds “local-preloaded” repository for offline installation
• Automatically sets scalaCompilerBridgeSource correctly, reducing the boilerplate needed to make a dotty project (when sbt detects projects being compiled with dotty)
• Fixes .triggeredBy/.storeAs/etc not working when using := and .valuemacros

The changes are thanks to a total of eleven contributors including Eugene Yokota, Dale Wijnand, Lars Hupel, Guillaume Martes, Jason Zaugg, and more.

That’s just a small sampling. You can read the full release notes here: sbt 0.13.15 release.

On April 6th, the latest release candidate for Scala IDE made itself known. There are quite a few changes, fixes for compilation errors, and updates for some dependencies.

According to the release, a few changes include:

• Modifies wrong object descriptor
• Prepares Scala IDE to run with Scala 2.12.1
• Adds sourceLevel property to preferences
• Adapts Scala refactoring config

Scala IDE 4.6.0-RC1 is fully compatible with Scala 2.12.

Updates are thanks to Wieslaw Popielarski, Simon Schäfer, Matthias Langer, and Sam Halliday.

View the full change log here: Scala IDE 4.6.0-RC-1 is out.

https4s dropped a handful of releases on us this week including v0.16.0-M1, v0.15.8, and v0.17.0-M1 so clearly there are quite a few changes.

According to the changelog, the releases feature of variety of changes including:

V.0.17.0-M1:

• All scalaz types and typeclasses have been replaced by the cats equivalents
• scalaz.concurrent.Task replaced by fs2.Task
• scalaz.stream.Process replaced by fs2.Stream

V.0.16.0-M1:

• Upgrades dependencies for various modules like: circe-0.7.1, scalacheck-1.13.5, json4s-3.5.1 and more
• Adds a WebjarService for serving files out of web jars.
• Eliminates Fallthrough typeclass. An HttpService now returns MaybeResponse, which can be a Response or Pass. There is a Semigroup[MaybeResponse] instance that allows HttpServices to be chained as a semigroup. service orElse anotherService is deprecated in favor of service |+| anotherService.

V.0.15.8:

• Cache charset lookups to avoid synchronization
• Strip fragment from request target in blaze-client

That’s just a small selection of what’s going on in these updates. View the full change log here: http4s changelog.

Additional great content and news:

• Scala compiler and standard bug tracker created

• Idris - New functional language champions type-driven development

• BeanPúree - A middle layer between JavaBeans and Shapeless

• baking-soda - An interface between ClojureScript’s reagent and reactstrap

• Akka 2.5.0 Final coming April 13th

• Qt versus Wx: How do two of the most popular Python frameworks compare

• Databricks Launches New Edition of Its Spark-Based Cloud Platform for Data Engineers

Suggested information to digest this week:

The functional programming community has no shortage of excellent conferences, talks, and articles. Here are just a few that were released that we recommend checking out if you missed them the first time:

Herdy Handoko:

Herdy Handoko presented Dotty: A next generation Scala compiler at the Singapore Scala Meetup. Check out the slides here:

Alexander Solovyov:

Roman Podoliaka presented Debugging of Python with gdb at PyCon Ukraine 2017. Check out the slides here:

Upcoming Events:

Scala Days: Chicago

• April 19-21, 2017
• Swisshotel - Chicago, IL

PTJUG & GDGLX Session #10

• May 9, 2017
• Universidade de Lisboa - Lisbon, Portugal

LX Scala

• May 12, 2017
• Microsoft Headquarters - Lisbon, Portugal

Have a news tip for us? Tweet to us @47deg or send to us via email here.