Elixir: Gentle Introduction to Functional Programming

Slides for a lightning talk introducing elixir at the Stanford IT Unconference

Transcript

1. Elixir: An Introduction to Functional Programming Booker C. Bense : bbense@slac.stanford.edu
9. def build_paths(:help) do IO.puts @moduledoc System.halt(0) end
10. def build_paths(:help) do IO.puts @moduledoc System.halt(0) end
14. args |> parse_args |> build_paths |> background |> process |> cleanup
15. args |> parse_args |> build_paths |> background |> process |> cleanup
17. • { code , results } = File.Stat(path) • { :ok , results } = File.Stat(path)
18. • { code , results } = File.Stat(path) • { :ok , results } = File.Stat(path)
20. def build({options,[head | tail]}) do {options,process( head ),tail } end def build_paths(:help) do IO.puts @moduledoc System.halt(0) end
21. def build({options,[head | tail]}) do {options,process( head ),tail } end def build_paths(:help) do IO.puts @moduledoc System.halt(0) end
23. def sum_list([head|tail], accumulator) do sum_list(tail, head + accumulator) end def sum_list([], accumulator) do accumulator end
24. def sum_list([head|tail], accumulator) do sum_list(tail, head + accumulator) end def sum_list([], accumulator) do accumulator end
26. if( a == 1 , do: b = 1, :else b = 2) if a == 1 do b = 1 else b = 2 end
27. if( a == 1 , do: b = 1, :else b = 2) if a == 1 do b = 1 else b = 2 end
29. time elixir --erl "+P 1000000" -r chain.exs -e "Chain.run(1_000_000)" {13896652, "Result is 1000000”} 15.75 real 7.26 user 8.45 sys
30. time elixir --erl "+P 1000000" -r chain.exs -e "Chain.run(1_000_000)" {13896652, "Result is 1000000”} 15.75 real 7.26 user 8.45 sys
32. Erlang OTP Concurrency Actors, Tasks, Applications GenServer GenEvents
33. Erlang OTP Concurrency Actors, Tasks, Applications GenServer GenEvents
34. More Resources • www.elixir-lang.org - Installation instructions and excellent tutorial. • Goggle Groups : elixir-lang-talk • Stack Overflow: tag elixir