scala.meta
Shapeless
scala.meta | Shapeless | |
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2 | 13 | |
1,110 | 3,386 | |
0.4% | - | |
9.8 | 7.1 | |
3 days ago | 11 days ago | |
Scala | Scala | |
BSD 3-clause "New" or "Revised" License | Apache License 2.0 |
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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.
scala.meta
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Scala Library To Generate Case Classes for JSON
I just wrote a small generator for a personal project using scalameta. It might be worth doing just for the learning experience, I thought it was a blast to use.
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Running tests from emacs
I have successfully installed metals on emacs as per the instructions on scalameta.org - things like syntax highlighting and jump to definiton work, and lsp-metals-doctor-run shows mostly green ticks.
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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Is there the equivalent of this in Scala ? (Maps to Struct)
This is the FromMap typeclass in Shapeless. Note that there’s a companion syntax package for it providing .toRecord for any Map and an appropriately-structured Record (and a Record is the LabelledGeneric representation of a case class).
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Scala 3: modifying product types in compile-time
If that's what you want, you can use Shapeless' records and HList. You can probably replicate this in plain Scala 3 with tuples and literal types as you said. It won't play nice with your others libs though but maybe there are integrations.
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Does Scala have support for Dependent types?
See the Shapeless Sized example.
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How does Scala's type system compare to TypeScript's? Is it as powerful?
Shapeless has Sized: https://github.com/milessabin/shapeless/blob/v2.3.9/core/src/main/scala/shapeless/sized.scala
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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.
What are some alternatives?
Lamma - Lamma schedule generator for Scala is a professional schedule generation library for periodic schedules like fixed income coupon payment, equity deravitive fixing date generation etc.
cats - Lightweight, modular, and extensible library for functional programming.
Ammonite-Ops - Scala Scripting
Monocle - Optics library for Scala
enableIf.scala - A library that toggles Scala code at compile-time, like #if in C/C++
magnolia - Easy, fast, transparent generic derivation of typeclass instances
Scala Async - An asynchronous programming facility for Scala
Scalaz - Principled Functional Programming in Scala
Chimney - Scala library for boilerplate-free, type-safe data transformations
n-scala - A new Scala wrapper for Joda Time based on scala-time
scala-newtype - NewTypes for Scala with no runtime overhead