Functional Programming for Rubyists

on YouTube ↗44m

" summary

Claim: Ruby benefits from a pure functional core for easier testing and parallelism, paired with external state management. Demonstrations use gems: Hamster for persistent data structures (structural sharing, performant in MRI), Concord/Anima + Adamantium for immutable structs, Mentum for deep freeze, Closure for STM, and Funky Phi for auto-curry/composition. Book-in-progress The Happy Lambda has ~40 pages and 100+ paid readers. Performance tradeoffs appear—more allocations but gained history, easier refactoring, and working proofs of concept that hold up in practice.

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" chapters (8)

1. 0:00Start
2. 7:18IMPERATIVE PROGRAMMING
3. 7:39EVOLUTIONARY STEPS
4. 14:19PURE FUNCTIONS
5. 16:05REFERENTIAL TRANSPARENCY
6. 23:11The man weakness of functional programming
7. 33:13VALUES IN RUBY
8. 33:45IMMUTABLE STRUCTS

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