Jose Valim during SFI Academic IT Festival (03/13/2015) has presented basics and motivation for Elixir programming language.

1. @elixirlang / elixir-lang.org

2. Rails 2.2
threadsafe

3. Functional
programming

4. • Explicit instead of implicit state
• Transformation instead of mutation

6. Switch
Switch

7. Switch
Browser
Endpoint
Server

8. http://stackoverflow.com/questions/1636455/where-is-
erlang-used-and-why

9. http://blog.whatsapp.com/index.php/
2012/01/1-million-is-so-2011/
2 million connections
on a single node

10. Intel Xeon CPU X5675 @ 3.07GHz
24 CPU - 96GB
Using 40% of CPU and Memory

11. Idioms

12. •Functional
•Concurrent
•Distributed

13. Sequential
code

14. Sequential
code
elixir

15. elixir

16. elixir

17. WebDB MailerStats

18. WebDB MailerStats
Sup

19. WebDB MailerStats
Sup
App

20. •Processes
•Supervisors
•Applications
•Message passing

21. •Concurrent
•Let it crash
•Fault tolerant
•Distributed?

22. elixir

23. app2@localapp1@local
elixir

24. •Compatibility
•Extensibility
•Productivity

25. goal#1
Compatibility

26. goal#2
Extensibility

27. Now we need to go meta. We should now
think of a language design as being a
pattern for language designs. A tool for
making more tools of the same kind.
Guy Steele - “Growing a language”
at ACM OOPSLA 1998

28. defmacro unless(expr, opts) do
quote do
if(!unquote(expr), unquote(opts))
end
end
unless(is_number(x), do: raise(“oops”))
elixir

29. defmodule MathTest do
use ExUnit.Case
test "basic operations" do
assert 1 + 1 == 2
end
end
elixir

31. from p in Post,
where: p.published_at < now and
p.author == “José”,
order: p.created_at
elixir

32. goal#3
Productivity

33. •First-class documentation
•Tooling (ExUnit, IEx, Mix)
•Hex packages

34. Demo time!

35. elixir-lang.org

38. beamcommunity.github.io / @josevalim

39. elixir-lang.org / @elixirlang