Hand Rolled Applicative User Validation Code Kata

Published: 09 Jun 2024

Uploaded: 09 Jun 2024

Description: view

Slideshow: view - 1,040 views

All slides : view

Download: pdf (for a perfect viewing experience - see the slides as they are meant to be seen)

Speakerdeck: slideshow - 178 views - uploaded 09 Jun 2024

Slideshare: slideshow - 22 views - uploaded 09 Jun 2024

Scala Code: github repo

1040

149

	23		31		25

Could you use a simple piece of Scala validation code (granted, a very simplistic one too!) that you can rewrite, now and again, to refresh your basic understanding of Applicative operators <*>, <*, *>?
The goal is not to write perfect code showcasing validation, but rather, to provide a small, rough-and ready exercise to reinforce your muscle-memory.
Despite its grandiose-sounding title, this deck consists of just three slides showing the Scala 3 code to be rewritten whenever the details of the operators begin to fade away.
The code is my rough and ready translation of a Haskell user-validation program found in a book called Finding Success (and Failure) in Haskell - Fall in love with applicative functors.