Elixir Mini Introduction for Zürich Meetup

Transcript

1. Elixir Stefan Wintermeyer @wintermeyer
2. Elixir is a functional, concurrent, general-purpose programming language that runs on the Erlang virtual machine (BEAM). https://en.wikipedia.org/wiki/Elixir_(programming_language)
3. defmodule ModuleName do def hello do IO.puts "Hello World" end end http://elixir-lang.org/crash-course.html
4. IEx Elixir’s interactive shell
6. Why would I want to learn Elixir? Why invest the time and effort? I’m happy with Ruby and OO.
7. Three Main Reasons Spoiler Alert: Concurrency is not one of them.
8. 1. Speed Elixir runs circles around Ruby and Python.
9. 2. Stability Speed is nothing without stability.
10. 3. Hot-Code Upgrades Zero Downtime!
11. Some Code Examples
12. Assigning Values to Variables
13. iex(1)> a = 1 1 iex(2)>
14. iex(1)> a = 1 1 iex(2)> a = 2 2 iex(3)>
15. iex(1)> a = 1 1 iex(2)> a = 2 2 iex(3)> ^a = 3 ** (MatchError) no match of right hand side value: 3
16. Tuples
17. iex(1)> {a, b, c} = {10, 20, 30} {10, 20, 30} iex(2)>
18. iex(1)> {a, b, c} = {10, 20, 30} {10, 20, 30} iex(2)> a 10 iex(3)>
19. Pattern Matching
20. iex(1)> {a, b, c} = {10, 20, 30} {10, 20, 30} iex(2)>
21. iex(1)> {a, b, c} = {10, 20, 30} {10, 20, 30} iex(2)> {a, 20, c} = {10, 20, 30} {10, 20, 30} iex(3)>
22. iex(1)> {a, b, c} = {10, 20, 30} {10, 20, 30} iex(2)> {a, 20, c} = {10, 20, 30} {10, 20, 30} iex(3)> {a, 1, c} = {10, 20, 30} ** (MatchError) no match of right hand side value: {10, 20, 30}
23. If you want to get your feed wet with Elixir I recommend two projects.
24. If you like hardware try http://nerves-project.org
26. If you like the web try www.phoenixframework.org
28. Phoenix Framework Productive. Reliable. Fast. Phoenix != Rails
30. mix phoenix.new blog Y cd blog vim config/dev.exs brew install postgres brew services start postgres createuser -W --createdb blog demo mix ecto.create mix phoenix.gen.html Post posts subject body vim web/router.ex resources "/posts", PostController mix ecto.migrate mix phoenix.server Blog Example
31. Thank you! @wintermeyer