AheadOfTime295

Monads got a facelift in Scala 3 with braceless syntax, aka significant indentation

https://dotty.epfl.ch/docs/reference/other-new-features/inde...

The recent focus on Akka is in line with Lightbend securing a 25MM funding round last year, and the ensuing layoffs of Scala engineers https://news.ycombinator.com/item?id=22842166

Please note: the official site of Scala 3 is scala-lang.org

For Pure FP there's scala3.com

If this Principle of Least Power had been applied to sbt, what would have been the result? Compilation times depend on scalac and not so much sbt.

Perhaps Scala adoption would be higher today. Assuming no competitors (Kotlin) had gained momentum.

The maintainer of Slick was in the last round of layoffs at Lightbend. Not sure who maintains Slick these days.

https://news.ycombinator.com/item?id=22854494

And the story goes on: upgrading Spark to Scala 2.13 https://issues.apache.org/jira/browse/SPARK-25075

Scala 3 supports braceless syntax, aka significant indentation, aka "YAML is to JSON as Scala 3 is to Scala 2"

https://dotty.epfl.ch/docs/reference/other-new-features/inde...

There was quite some debate on this, going on strong.

Scala 3 making progress is great, just like progress on the Scala 2.13 camp:

Scala on Track to Support Java 9 Module System https://github.com/scala/scala-dev/issues/529

Scala 2.13 on track to support Spark https://issues.apache.org/jira/browse/SPARK-25075

YMMV. Some features of Scala 2.x have been dropped in Scala 3 (ETA late 2020), others added.

Features we know Scala 3 will have https://dotty.epfl.ch/docs/

A comparison of features across Scala 2.x and Scala 3 is the migration guide https://github.com/scalacenter/scala-3-migration-guide

Stats of last week layoffs at Lightbend (Akka, Scala) right after 25MM funding round

https://news.ycombinator.com/item?id=22854494

Stats of recent layoffs at Lightbend (Akka, Scala) just after 25MM funding round

An analysis of what could be going on https://twitter.com/scala_ninja/status/1248368141765193728

Layoffs announced so far. If you know more, please share, to understand the big picture.

- Lightbend Senior Product Director https://twitter.com/cblitz/status/1247646609518800902

- Lightbend Solutions Architect https://twitter.com/jeremy_daggett/status/124758596801136640...

Headcount reductions, Scala Compiler team at Lightbend https://twitter.com/adriaanm/status/1218183512290988034 https://twitter.com/StefanZeiger/status/1247940329447268353

After layoffs and internal transfers, Compiler team includes https://twitter.com/lrytz https://twitter.com/retronym https://twitter.com/SethTisue

Headcount reduction at Lightbend, Scala Build Tool (sbt) https://twitter.com/eed3si9n/status/1247918244926758913

Announcement of recent hire (Q4 2019) https://twitter.com/dwijnand/status/1196335768173785088

Related: What's next for Scala https://news.ycombinator.com/item?id=22830779

Scala 3 could improve on 2.x struggles with supporting JDK 9 and up:

Support features of JDK 11+ https://github.com/scala/scala-dev/issues/139

Support Java Module System https://github.com/scala/scala-dev/issues/529

In comparison language features seem to attract much more attention:

Removing existential types https://contributors.scala-lang.org/t/proposal-to-remove-exi...

Significant indentation syntax https://github.com/lampepfl/dotty/pull/7083

A word of caution on Scala 3:

Scala 3 still in beta, lacks clear roadmap, allows choosing between two syntaxes (python-style vs braces).

Dotty Community Build lacking Lightbend frameworks (no Akka, no Play, no sbt)

With the recent layoffs at Lightbend of Scala 2.x core contributors, a full endorsement of Scala 3 would certainly help.

For context see

Lightbend secures 25MM funding round, proceeds to layoff Scala contributors https://news.ycombinator.com/item?id=22842166

Other discussions:

https://twitter.com/jamie_allen/status/1248019842877145089

http://eed3si9n.com/6years-at-lightbend

https://twitter.com/phonytope/status/1248025015447998465

https://www.lightbend.com/company/news/lightbend-closes-25m-...

Apparently layoffs underway at Typesafe/Lightbend

Scala contributors, no less.

https://mobile.twitter.com/jamie_allen/status/12480198428771...

Farewells piling up:

Six years at Lightbend, by Eugene Yokota (Scala sbt, scalaxb, scopt) https://news.ycombinator.com/item?id=22836399

Duplicate of https://news.ycombinator.com/item?id=22830779

Announcement on Dotty as the future Scala 3 came from Scala Center (EPFL) not Typesafe/Lightbend.

AFAIK Typesafe/Lightbend has made no commitment to Scala 3.

Too bad the roadmap for Scala 2.14 has been scrapped.

Many videos exist on writing servers using FP libraries. A few search keywords for Scala: ZIO, Cats, fs2.

A beginner tutorial using a command-line application as case study:

https://scalac.io/write-command-line-application-with-zio/

All in one place: A Glossary of Functional Programming

http://degoes.net/articles/fp-glossary

by John A De Goes, keynote speaker at Scala conferences. Discussions on FP using Scala at

https://www.reddit.com/r/hascalator

Scala 3 has been around for seven years on Github https://github.com/lampepfl/dotty/commit/2308509d2651ee78e11...

Scala.js and Scala Native will support Scala 3 eventually.

SBT isn't nearly as bad as it used to be. It's an open question how much more it will "improve".

Macros and their migration path to Scala 3 have been discussed at the Scala Center, EPFL https://scala.epfl.ch/minutes/2018/12/05/december-5-2018.htm...

Twitter not only early adopted GraalVM but also open sourced the Reasonable Scala Compiler https://github.com/twitter/rsc/commit/5d86ee2e2577684f49ce1f...

Definitely a large Scala shop.

Scala 3 gets lots of discussion recently yet progress on Scala 2 matters too:

Spark on Scala 2.13 https://issues.apache.org/jira/browse/SPARK-25075

Scala 2 and the Java 9 Module System https://news.ycombinator.com/item?id=20912258

Projects about faster Scala compilation:

[1] https://medium.com/@gkossakowski/from-kentucky-mule-to-faste...

[2] https://github.com/twitter/rsc

While on this topic:

[0] https://www.reddit.com/r/scala/comments/98u0lv/is_it_true_th...

[1] https://www.reddit.com/r/scala/comments/98u0lv/is_it_true_th...

On a more positive note, Sam Halliday just published Functional Programming for Mortals with Scalaz

[2] https://leanpub.com/fpmortals

Scala's developer mindshare is going down according to John De Goes [0]

> "Scala is receding on numerous observable measures"

[0] https://www.reddit.com/r/scala/comments/8xreuv/keynote_the_l...

It will be interesting to try out implicits in the upcoming Twitter's Reasonable Scala Compiler [0]

According to [1] a working version will be ready before originally planned:

> Recently, Stu Hood came up with a groundbreaking idea. He suggested > that Rsc can become useful much earlier that we initially thought.

[0] https://github.com/twitter/rsc

[1] https://github.com/twitter/rsc/commit/ebc3019c06c9e175311541...

Re implicits and their interplay with macros: Achieving 3.2x Faster Scala Compile Time

Diagnostics:

- A method takes an implicit parameter to be filled in by the compiler

- the Scala compiler synthesizes an argument for that parameter using macros

- instead of using an existing value in the implicit scope

Conclusion: that's why a small source file took so long to typecheck.

Details at https://jobs.zalando.com/tech/blog/achieving-3.2x-faster-sca...