Architecting Typed FP Applications & Libraries in Kotlin with Arrow

on YouTube ↗40m

" summary

Library implements a polymorphic GitHub Gist fetcher built atop Arrow and Kotlin, returning immutable models and supporting multiple effect runtimes (Rx2 Observable, Reactor Flux, Kotlin coroutines/Deferred, Arrow IO). It uses generated optics/lenses for deep immutable updates, tagless‑final style type classes with a Kind emulation, monad transformers to avoid nested unwrapping, and modular runtime instances per backend. The example compiles, runs, and meets the stated requirements.

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" chapters (13)

1. 0:00Start
2. 4:15Requirements
3. 5:09Flux
4. 9:51Optics Library
5. 14:35Initial Impure Implementation
6. 15:50Pattern Matching
7. 18:33Co-Routines Encoding
8. 25:25Type Class
9. 28:10Static Functions
10. 29:48Delegation
11. 30:48Why Are We Testing Boolean Instead of Pattern Matching
12. 37:30The Cartesian Builder
13. 39:43Thank You

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