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Tracking mentions began in Dec 2020.
Can types replace validation?
2 projects | reddit.com/r/programming | 28 Aug 2022
In one respect, nothing. You’re right. Even given refinement types as in Haskell or Scala, there is indeed a necessarily-partial function (refineV in Scala) to refine a value to its refinement type.
Simple, Naïve, and Wrong: More than you wanted to know about Scala Case Classes
3 projects | reddit.com/r/scala | 26 Feb 2022
This is more or less how derivation works when you want to use something like Refined types (it exposes Validate[Type, Refinement] typeclass if I remember correctly). Enumeratum exposes Enum[A], and newtypes expose Coercible[From, To].
Opinions on implementing traits for validation with the help of a companion object
2 projects | reddit.com/r/scala | 26 Feb 2022
You will probably be interested into Iron or Refined.
Help with Single Value Validated Types
2 projects | reddit.com/r/scala | 27 Aug 2021
You want either a refined type, a newtype, or if you are in Scala 3 an opaque type.
Alan Kay's answer to What was the last breakthrough in computer programming?
3 projects | news.ycombinator.com | 17 Aug 2021
Why there is still no ExpressJS-like alternative in Scala?
5 projects | reddit.com/r/scala | 7 Jan 2021
This example uses probably the most popular JSON library for Scala, Circe. There is another Scala library that lets us "be more specific with," or "refine," our types, called Refined. http4s doesn't provide any particular support for Refined, but Circe has a module integrating Refined, meaning that all of Circe's parsing, encoding, and decoding support is integrated with Refined. Putting together http4s' Circe support, Circe's generic codec derivation, and Circe's Refined integration, here's what I came up with:
What are some alternatives?
Cassovary - Cassovary is a simple big graph processing library for the JVM
cats - Lightweight, modular, and extensible library for functional programming.
Shapeless - Generic programming for Scala
Scalaz - Principled Functional Programming in Scala
Ammonite-Ops - Scala Scripting
Records for Scala - Labeled records for Scala based on structural refinement types and macros.
Stateless Future - Asynchronous programming in fully featured Scala syntax.
Scala Blitz - Scala framework for efficient sequential and data-parallel collections -
Monocle - Optics library for Scala