Elixir

This talk highlights the reason, goals and roadmap behind Elixir, http://elixir-lang.org

Transcript

1. @elixirlang / elixir-lang.org Monday, November 19, 2012
2. @josevalim Monday, November 19, 2012
3. Monday, November 19, 2012
4. Why? Monday, November 19, 2012
5. case #1 Monday, November 19, 2012
6. Switch Switch Monday, November 19, 2012
7. Switch Browser Endpoint Server Monday, November 19, 2012
8. Server Browser Monday, November 19, 2012
9. •Web sockets •API streaming •Server sent events Server Monday, November 19, 2012
10. case #2 Multi-core Monday, November 19, 2012
11. Server Server Server Server Monday, November 19, 2012
12. 50 cores $2600 Monday, November 19, 2012
13. Server Monday, November 19, 2012
14. case #3 Doing it live! Monday, November 19, 2012
15. http://blog.whatsapp.com/index.php/2012/01/1-million-is-so-2011/ 2 million connections on a single node Monday, November 19, 2012
16. http://stackoverflow.com/questions/1636455/where-is-erlang-used-and-why Monday, November 19, 2012
17. Goals Monday, November 19, 2012
18. goal #1 Productivity Monday, November 19, 2012
19. Everything is an expression Monday, November 19, 2012
20. -module(my_module). some_function(Foo) -> % ... other_function(Bar) -> % ... erlang Monday, November 19, 2012
21. -module(my_module). % won’t compile io:put_chars("hello"). some_function(Foo) -> % ... other_function(Bar) -> % ... erlang Monday, November 19, 2012
22. defmodule MyModule do def some_function(foo) do # ... end IO.puts "hello" def other_function(bar) do # ... end end elixir Monday, November 19, 2012
23. Macros Monday, November 19, 2012
24. :foo - atoms/symbols { 1, 2, 3 } - tuples [ 1, 2, 3 ] - lists Monday, November 19, 2012
25. is_atom(:foo) function line args atom { :is_atom, 1, [:foo] } Monday, November 19, 2012
26. 1 + 2 function line args { :+, 1, [1,2] } Monday, November 19, 2012
27. defmacro unless(expr, opts) do quote do if(!unquote(expr), unquote(opts)) end end unless(true, do: exit()) elixir Monday, November 19, 2012
28. Domain Specific Languages Monday, November 19, 2012
29. defmodule MathTest do use ExUnit.Case test "basic operations" do assert 1 + 1 == 2 end end elixir Monday, November 19, 2012
30. defmodule MathTest do use ExUnit.Case def test_basic_operations do assert 1 + 1 == 2 :ok end end elixir Monday, November 19, 2012
31. assert 1 + 1 == 2 { :==, 5, [1 + 1, 2] } function line args Monday, November 19, 2012
32. # assert 1 + 1 == 2 defmacro assert({ :=~, line, [l,r] }) do # ... end defmacro assert({ :==, line, [l,r] }) do # ... end defmacro assert(default) do # ... end Monday, November 19, 2012
33. goal #2 Extensibility Monday, November 19, 2012
34. -module(json). to_json(Item) when is_list(Item) -> % ... to_json(Item) when is_binary(Item) -> % ... to_json(Item) when is_number(Item) -> % ... erlang Monday, November 19, 2012
35. Protocols Monday, November 19, 2012
36. defprotocol JSON do def to_json(item) end JSON.to_json(item) elixir Monday, November 19, 2012
37. defimpl JSON, for: List do # ... end elixir defimpl JSON, for: Binary do # ... end defimpl JSON, for: Number do # ... end Monday, November 19, 2012
38. defimpl JSON, for: Array do # ... end elixir Monday, November 19, 2012
39. goal #3 Compatibility Monday, November 19, 2012
40. Monday, November 19, 2012
41. DISTRIBUTED FAULT-TOLERANT APPLICATIONS WITH HOT-CODE SWAPPING Monday, November 19, 2012
42. There is no conversion cost for calling Erlang from Elixir and vice-versa Monday, November 19, 2012
43. • UTF-8 binaries strings • Keyword arguments • First-class documentation • First-class regular expressions • Zero-index access • ... Monday, November 19, 2012
44. Example Monday, November 19, 2012
45. defmodule MathTest do use ExUnit.Case, async: true test "basic operations" do assert 1 + 1 == 2 end end elixir Monday, November 19, 2012
46. 1 MathTest 2 SystemTest 3 ... 4 ... 5 ... 6 ... 7 ... 8 ... ExUnit. Runner ExUnit. Formatter Monday, November 19, 2012
47. 1 MathTest 2 SystemTest 3 ... 4 ... 5 ... 6 ... 7 ... 8 ... ExUnit. Runner run ExUnit. Formatter Monday, November 19, 2012
48. 1 MathTest 2 SystemTest 3 ... 4 ... 5 ... 6 ... 7 ... 8 ... ExUnit. Runner run ExUnit. Formatter Monday, November 19, 2012
49. 1 MathTest 2 SystemTest 3 ... 4 ... 5 ... 6 ... 7 ... 8 ... ExUnit. Runner run ExUnit. Formatter Monday, November 19, 2012
50. 1 MathTest 2 SystemTest 3 ... 4 ... 5 ... 6 ... 7 ... 8 ... ExUnit. Runner done ExUnit. Formatter info Monday, November 19, 2012
51. 1 MathTest 2 SystemTest 3 ... 4 ... 5 ... 6 ... 7 ... 8 ... ExUnit. Runner ExUnit. Formatter run Monday, November 19, 2012
52. 127.0.0.9 127.0.0.3 1 MathTest 2 SystemTest 3 ... 4 ... 5 ... 6 ... 7 ... 8 ... ExUnit. Runner ExUnit. Formatter Monday, November 19, 2012
53. 127.0.0.9 127.0.0.3 1 MathTest 2 SystemTest 3 ... 4 ... 5 ... 6 ... 7 ... 8 ... ExUnit. Runner ExUnit. Formatter ExUnit. Supervisor Monday, November 19, 2012
54. Roadmap Monday, November 19, 2012
55. • v0.6 (Aug/12) Erlang language compatibility • v0.8 (Dec/12) Erlang apps support • Dynamo (xx/13) Web framework • v0 (Jan/11) Monday, November 19, 2012
56. Monday, November 19, 2012
57. @elixirlang / elixir-lang.org Monday, November 19, 2012