|about 1 month ago||21 days ago|
|Apache License 2.0||Apache License 2.0|
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Question regarding Recursive datatypes and cats typeclasses (Haskell to Scala)
3 projects | /r/scala | 6 Jul 2023
Scala 2-only: * Shapeless (there is Shapeless for Scala 3 but less often needed as basic things are in Scala 3)
Fp libraries that target scala 3 exclusively?
5 projects | /r/scala | 22 Nov 2021
I know that libraries like Scodec and shapeless were rewritten practically from scratch for Scala 3, taking advantage of the next syntax and internals, as well as protoquill - a Scala 3 implementation of Quill.
Delphi 11 Alexandria Has Been Released
4 projects | /r/programming | 23 Sep 2021
please show me something like this: https://akka.io/ or this: https://zio.dev/ or this: https://github.com/milessabin/shapeless
6 Years of Professional Clojure
6 projects | news.ycombinator.com | 2 Aug 2021
That largely depends on the type system. Languages like Haskell and Scala which have much more powerful type systems than C/Java/Go/etc absolutely do allow you to do those sorts of things. It is a bit harder to wrap your head around to be sure and there are some rough edges, but once you get the hang of it you can get the benefits of static typing with the flexibility of dynamic typing. See https://github.com/milessabin/shapeless or a project that I've been working on a lot lately https://github.com/zio/zio-schema.
Scala3: Does it provide a simplified way of doing n-term generic parameters?
2 projects | /r/scala | 6 Jun 2021
Just use cats and use the apply syntax .mapN for this. Seriously. There isn't a way to do it without generating source code that I can see in the api. Scala 3's HList Tuples aren't like Shapeless 2's HLists and I can't figure out a way in the api to reduce the tuple members down from (A, B, C, D) into an E, generically, yet with Scala 3 poly functions, unlike what you could do in Shapeless 2 with HList
Scala: A Love Story
4 projects | dev.to | 21 Apr 2021
Scala has sparked a huge ecosystem of very high quality libraries (Cats, Scalaz, shapeless, to name but a few). I think a major reason for this is that Scala attracts developers who value the advantages of the JVM, but are fed up with the limitations of the Java programming language and understand the benefits of an expressive type system and functional programming.
Jam 0.0.4 got Scala 3 support
3 projects | /r/scala | 17 Apr 2021
I also investigated shapeless3 macroses: https://github.com/milessabin/shapeless/tree/shapeless-3/modules, but they are more about derivation than reflection. And probably that is all I found.
Why Learn Haskell?
2 projects | news.ycombinator.com | 1 Mar 2021
I'm not sure where is the line between extensive and basic knowledge. Here is my more detailed exposure:
In commercial context:
* Of strongly typed ones only Scala (with [shapeless]). Can reluctantly throw in Kotlin as well for it's amazing structured concurrency.
In non-commercial context:
* Went through a few chapters of [Software Foundations] doing Coq proofs.
* Worked through most of the [Types and Programming Languages] (writing typecheckers in Ocaml)
* 3 services in Haskell (1 on Scotty, 2 on Servant). Loved persistent+esqueleto for the ORM layer, disliked Opaleye.
* 2 projects in PureScript (1 with Halogen, 1 with React bindings).
* 1 project in ReasonML (Ocaml).
> I am afraid there is no way back for me
I see where you are coming from. In my case I can alternate between "I want all invariants properly expressed and checked" and "I just want to ship that barely-working piece of junk and iterate on it". I learned to adjust depending on organization needs. IMO, for many orgs, especially startups/scaleups, the latter is often the more fitting way. With that in mind, I'm willing to trade the guiding hand of great type systems for other productivity aspects (amazing runtime and cohesive web framework in Elixir's case).
[Software Foundations]: https://softwarefoundations.cis.upenn.edu/
[Types and Programming Languages]: https://www.cis.upenn.edu/~bcpierce/tapl/
We haven't tracked posts mentioning Scala Graph yet.
Tracking mentions began in Dec 2020.
What are some alternatives?
cats - Lightweight, modular, and extensible library for functional programming.
magnolia - Easy, fast, transparent generic derivation of typeclass instances
Monocle - Optics library for Scala
Scalaz - Principled Functional Programming in Scala
Chimney - Scala library for boilerplate-free, type-safe data transformations
scala-newtype - NewTypes for Scala with no runtime overhead
scala.meta - Library to read, analyze, transform and generate Scala programs
ZIO - ZIO — A type-safe, composable library for async and concurrent programming in Scala
Ammonite-Ops - Scala Scripting
Cassovary - Cassovary is a simple big graph processing library for the JVM
Enumeratum - A type-safe, reflection-free, powerful enumeration implementation for Scala with exhaustive pattern match warnings and helpful integrations.