Elm & Elixir: Functional Programming and Web
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This document discusses functional programming and its use for web development. It introduces the Elm and Elixir languages as examples of pure functional languages that can handle input/output without side effects. Elm is described as a good choice for building mobile clients since it avoids CSS, HTML, and JavaScript. The document also presents serverless architecture as an option using Elm, with the client communicating directly with a shared database. It provides links to resources on Elm and the Phoenix framework for Elixir web development. Overall, the document promotes functional programming and Elm/Elixir as trends for building scalable and maintainable web applications.
![Why now?
Handling External World and IO
Elm & Elixir are pure functional langages that
handle this problem without getting dirty
Pure functionality leads to efficient compilers
Over simplified view :
fn([event1 … eventN])](https://image.slidesharecdn.com/main-161108035650/85/Elm-Elixir-Functional-Programming-and-Web-5-320.jpg)
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Elm & Elixir: Functional Programming and Web
- 1. Functional Programming and Web Umur Ozkul [email protected] http://www.slideshare.net/publitory/elm-elixir- functional-programming-and-web
- 2. Startup Crisis ● Competition ● Too many bugs ● High Response Time ● Scaling to billion users ● Metaprogramming & Beating the averages – http://paulgraham.com/avg.html If there is a nail then every tool is a hammer Join Formula 1 with a donkey ?
- 4. Why Functional Programming is Trending No Side Effects No runtime errors Evertything is testable If each user reports 1 bug then think about 10,000,000 users Better compilers Concurrency
- 5. Why now? Handling External World and IO Elm & Elixir are pure functional langages that handle this problem without getting dirty Pure functionality leads to efficient compilers Over simplified view : fn([event1 … eventN])
- 6. Elm No CSS, No Html, No Javascript Visual components, like OO but better Good for mobile clients
- 7. Serverless Architecture with Elm Nowadays every client is a powerful computer No need for server side processing We just need authenticated access to shared data No more scalability problem
- 8. Serverless Architecture with Elm Client Server Database Elm Client Authenticated Shared Data
- 9. Elm Links ● Language http://elm-lang.org/ ● Application Architecture ● https://www.elm-tutorial.org/en/ ● Arcade Game Examples http://builtwithelm.co/ ● Elm Component Example ● https://github.com/umuro/elm-mdl-counter-pair ● Mobile Widgets https://debois.github.io/elm-mdl/ Use Haskell syntax highlighting… Refer to Phoenix installation if you’re in trouble with node.js installation
- 10. Erlang VM Battle Tested Distributed processing on the phone satellites around the world Best context switching performance Born in 1987 by Ericsson We must develop our own language with the desirable features of Lisp, Prolog and Parlog, but with concurrency and error recovery built into the language
- 11. Elixir Good for Servers Threads, no processes Erlang VM : Concurrency is natural Microseconds, not milliseconds
- 12. Elixir Phoenix Links ● http://elixir-lang.org/install.html ● http://www.phoenixframework.org/docs/installation ● https://wiki.postgresql.org/wiki/Detailed_installation_guides ● http://www.phoenixframework.org/docs/up-and-running Do not study Elixir before studying Phoenix
- 13. Blorg $ mix phoenix.gen.json API.V1.Article articles title:string body:text $ mv web/models/api/v1/article.ex web/models/ $ mix ecto.migrate $ mix test Challenge : Implement (+) button to add new blog articles https://github.com/umuro/blorg
- 14. Last Word : Endurance ● Walk 7km per day ● Do not sit at least 3 hours per day ● 2 hours of weight lifting per week Or start to complain that you cannot program anymore… http://www.slideshare.net/publitory/elm-elixir- functional-programming-and-web