Erlang: TL;DR
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Erlang is a functional programming language built for concurrency, distribution, and fault tolerance. It uses an immutable data structure and avoids loops with tail recursion. The OTP framework provides tools like supervision trees, behaviors, and hot code swapping. While Erlang syntax looks like Prolog, it can integrate with Ruby via bridges or messaging and runs on Heroku. The document recommends resources for learning Erlang and OTP and participating in the local Erlang meetup.
Erlang: TL;DR
- 1. Erlang TL;DR edition for busy ruby peoples A short presentation :D • with bullet points :( and no lolcats :( in a default keynote theme :( by Vaughan Allan :D http://github.com/vorn @vornstar
- 3. Erlang in 2 minutes • Functional • Built for reliability (nine nines) • Some nice adjectives include: • concurrent, distributed, “soft real-time” • fault tolerant • scalable (cloud-scale, web-scale) • green (sort of)
- 4. Erlang in 2 minutes • Gotchas include: • It looks a lot like Prolog • Immutability • No “loops” (use tail recursion, or map funs) • Strings are weird-ish
- 5. OTP in 5 minutes • It’s an application framework • Release handling (sort of), hot code-swapping • Supervision Tree • Patterns (behaviours)
- 7. Behaviours • gen_sup - supervisor, often linked to one of: • gen_server - generic module • gen_fsm - finite state machine • gen_event - event-driven pub/sub
- 9. WTFBRO this ain’t Ruby • You might be using it already (hello, CouchDB?) • Integration options: • Ruby-Erlang bridge (erlectricity, experimental) • ZeroMQ • DIY (REST/socket APIs are easy *) • It runs on Heroku ** • https://github.com/vorn/ChicagoBoss-on-Heroku
- 10. Build Something • rebar - a build tool (on steroids) • ChicagoBoss - (Rails-like MVC Framework) • for immediate gratification • webmachine by Basho (a “REST Toolkit”) • Emacs! (?)
- 11. Hack Something • ChicagoBoss - http://github.com/evanmiller • http://github.com/languages/Erlang • Riak, RabbitMQ , eJabberd, CouchDB
- 12. Read Something “Don't drink too much • http://learnyousomeerlang.com Kool-Aid” • “Programming Erlang” (pragprog.com) • “Erlang Programming” (O’Reilly) - good for learning OTP • “Erlang and OTP in Action” (Manning) • “7 Languages in 7 weeks” (pragprog.com)
- 13. Erlang Pizzafest • Every 2mths @ RocketBoots • Next meetup Tues 5th June • http://bit.ly/erl_syd • No experience necessary (pizza xp assumed)
- 14. Double-Click to Edit (this is the last slide)