Functional Programming in Kotlin with Λrrow

on YouTube ↗39m

" summary

Builds a pure, single-function Kotlin library that fetches GitHub gists into an immutable data model, uses an annotation processor to generate optics lenses for deep updates, and lifts errors into Either instead of throwing. Uses Arrow’s eitherT monad transformer to bind through coroutine Deferred, Rx Observable, Reactor Flux or Arrow IO, and runs the same polymorphic code in each runtime via an async type class. Shows higher-kinded emulation in Kotlin, modular packages, law-checked type class instances, and that the approach is testable and runtime-agnostic.

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" chapters (5)

1. 0:00Start
2. 0:37Introduction
3. 4:18Data Types
4. 30:50Type Class
5. 33:54Persist Cache Function

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