Shapeless
Quill
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Shapeless | Quill | |
---|---|---|
13 | 15 | |
3,362 | 2,135 | |
- | 0.0% | |
7.5 | 9.1 | |
8 days ago | 11 days ago | |
Scala | Scala | |
Apache License 2.0 | Apache License 2.0 |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
Shapeless
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Question regarding Recursive datatypes and cats typeclasses (Haskell to Scala)
Scala 2-only: * Shapeless (there is Shapeless for Scala 3 but less often needed as basic things are in Scala 3)
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Fp libraries that target scala 3 exclusively?
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.
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Delphi 11 Alexandria Has Been Released
please show me something like this: https://akka.io/ or this: https://zio.dev/ or this: https://github.com/milessabin/shapeless
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6 Years of Professional Clojure
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.
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Scala3: Does it provide a simplified way of doing n-term generic parameters?
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
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Scala: A Love Story
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.
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Jam 0.0.4 got Scala 3 support
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.
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Why Learn Haskell?
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).
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> 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).
[shapeless]: https://github.com/milessabin/shapeless
[Software Foundations]: https://softwarefoundations.cis.upenn.edu/
[Types and Programming Languages]: https://www.cis.upenn.edu/~bcpierce/tapl/
Quill
- Sketch of a Post-ORM
- I want to move to Scala 3, but I'm not sure what libraries to use
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Ask HN: What cutting-edge technology do you use?
I'm using it mostly for full-stack web development with ScalaJS (https://www.scala-js.org) in the frontend (https://outwatch.github.io/docs/readme.html) and in the backend with AWS lambdas.
The ecosystem is currently in the process of porting all the libraries to Scala 3. So if you're new to Scala, I'd recommend to start with Scala 2, which is rock-solid and already very powerful.
I never worked with SQLAlchemy. But on the scala database side, popular libraries are Doobie (https://tpolecat.github.io/doobie) and Quill (https://getquill.io). Keep in mind that these are for Scala on the JVM. On the ScalaJS side I'm using the javascript library pg. But I'd like to try if it works well with Prisma soon.
The nice thing about ScalaJS is, that you can use Javascript libraries. And if there are typescript facades, then you can transpile these to Scala and use them in a type safe way (https://scalablytyped.org).
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Fp libraries that target scala 3 exclusively?
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.
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Best Scala framework / libraries out there ?
Akka HTTP, Cats, Quill, ninny, Monix Observable, mill.
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Ideas for a Scala 3 MapStruct library?
https://getquill.io/#docs (Look under SCHEMA).
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Ask HN: What stack would you use to build a CRUD web app on the JVM today?
I would use it at work because I know it. There are a LOT of libraries in Scala for HTTP up to database stuff, and it really depends on what kind of ecosystem you're walking into:
* Scala as Python: https://github.com/com-lihaoyi/cask, maybe https://github.com/getquill/quill
* Scala as Haskell: HTTP4s, https://tpolecat.github.io/doobie/
* Scala as Rails: Play
Play is the closest thing to Rails-like CRUD productivity IMO, and honestly for CRUD most times I would like to write as little code as possible and just get it done, even using low/no-code solutions (postgrest, hasura, htmx), but that wasn't the question :)
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[Debate] Is type level programming useful?
quill is uses type level programming. It allows for the pre-computation of SQL queries during compilation, and you can inspect what queries will look like, whilst you code without, running anything.
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From First Principles: Why Scala?
I've heard that too but I think there are at least efforts to support Scala 3.
Having said that I think Quill looks nicer (https://getquill.io/) if you want a DSL like that.
What are some alternatives?
Slick - Slick (Scala Language Integrated Connection Kit) is a modern database query and access library for Scala
doobie - Functional JDBC layer for Scala.
cats - Lightweight, modular, and extensible library for functional programming.
ScalikeJDBC - A tidy SQL-based DB access library for Scala developers. This library naturally wraps JDBC APIs and provides you easy-to-use APIs.
magnolia - Easy, fast, transparent generic derivation of typeclass instances
Monocle - Optics library for Scala
Phantom - Schema safe, type-safe, reactive Scala driver for Cassandra/Datastax Enterprise
Clickhouse-scala-client - Clickhouse Scala Client with Reactive Streams support
Scalaz - Principled Functional Programming in Scala
zio-protoquill - Quill for Scala 3
Chimney - Scala library for boilerplate-free, type-safe data transformations
Squeryl - A Scala DSL for talking with databases with minimum verbosity and maximum type safety