Elixir is a game changer - let's spread the love

Transcript

1. HI
2. I’M ROMAN AND I LOVE PROGRAMMING
3. THAT’S ALL I’M GONNA TELL ABOUT ME FOR NOW
4. MY SLIDES ARE PLAIN I DID NOT REHEARSE MY TALK IT’S MY FIRST TALK AT A MEETUP I’VE GOT TOO MUCH TO SHARE TO FIT IT INTO A SINGLE TALK WHAT CAN GO WRONG? ;)
5. PLEASE BARE WITH ME AND LET’S MAKE THIS EVENT SOMETHING SPECIAL…
6. - PROGRAMMING IN THE SMALL - PROGRAMMING IN THE LARGE - A LITTLE SURPRISE TOPICS TODAY:
7. QUESTION / DISCUSSION: WHAT IS PROGRAMMING ALL ABOUT - THE MOST SIMPLE DEFINITION?
8. READ DATA TRANSFORM DATA WRITE DATA SIMPLISTIC DEFINITION
9. KEYWORD: DATA
10. KEYWORD: TRANSFORM
11. THAT IS WHAT MOST OF OUR TASKS LOOK LIKE. GET STUFF FROM SOMEWHERE, CHANGE IT SOMEHOW, SEND IT SOMEWHERE.
13. THE |> OPERATOR IS AWESOME!
14. IT MAKES THE FLOW VERY EXPLICIT
15. BUT HOW DO YOU DEAL WITH ERRORS? LET IT CRASH?
16. RAILWAY-ORIENTED PROGRAMMING TO THE RESCUE! - RUBY2ELIXIR/PLUMBER_GIRL
17. IT GIVES YOU A PROTOCOL TO CONTROL THE FLOW WITH EXPECTED ERRORS, RAISING FUNCTIONS AND SIDE-EFFECTS
18. defmodule TripleArrowExample do use PlumberGirl def tagged_inc(v) do IO.puts "inc for #{v}" # sideeffect for demonstration {:ok, v + 1} end def error_fn(_) do {:error, "I'm a bad fn!"} end def raising_fn(_) do raise "I'm raising!" end def result do 1 |> tagged_inc >>> tagged_inc >>> tagged_inc end def error_result do 1 |> tagged_inc >>> tagged_inc >>> error_fn >>> tagged_inc end def raising_result do 1 |> tagged_inc >>> tagged_inc >>> raising_fn >>> tagged_inc end end iex> TripleArrowExample.result inc for 1 inc for 2 inc for 3 {:ok, 4}
19. >>> {:OK, …} -> PASS {:ERROR, …} -> CONTROLLED FAIL
20. BIND WRAPS FUNCTION OUTPUT IN {:OK, OUTPUT} -> PROTOCOL COMPLIANT
21. TRY_CATCH WRAPS (POSSIBLY) RAISING FUNCTION IN {:ERROR, OUTPUT} / {:OK, OUTPUT}
22. TEE DOES SOME WORK AND RETURNS THE __INPUT__ (NOT OUTPUT!)
23. OK SIMPLE HELPER TO UNWRAP THE RESULT {:OK, OUTPUT} |> OK == OUTPUT
24. PLEASE CHECK IT OUT, YOU MIGHT LIKE IT HTTPS://GITHUB.COM/RUBY2ELIXIR/ PLUMBER_GIRL
25. WHEN YOUR FUNCTIONS DON’T QUITE WORK WITH THE FLOW…
26. defmodule Some do import PipeHere def check_pipe_here do "abc" |> Regex.match?(~r/a/, _) |> pipe_here end end iex> Some.check_pipe_here true
27. VICTOR HUGO BORJA HAS SOME REALLY COOL SMALL ELIXIR LIBRARIES, CHECK THEM OUT! GITHUB.COM/VIC
28. WHAT DO YOU THINK ABOUT PLUG?
29. HAVING SMALL BITS OF LOGIC IN MODULES AND “PLUG”-ING THEM TOGETHER AS YOU LIKE?
30. I REALLY LIKE THE IDEA OF “MIDDLEWARE”!
33. JUST FOR YOU: A STRIPPED DOWN VERSION OF PLUG FOR GENERAL PURPOSES
34. GITHUB.COM/RUBY2ELIXIR/PLUGIN HELPS YOU TO STRUCTURE YOUR BUSINESS LOGIC IN COMPOSABLE BLOCKS. THINK “PLUG-LITE”
35. defmodule Plugin1 do use Plugin.Builder plugin :first_fn def first_fn(acc, _) do Map.put(acc, :first_fn_passed, true) end end defmodule Plugin2 do use Plugin.Builder plugin :second_fn def second_fn(acc, _) do Map.put(acc, :second_fn_passed, true) end end defmodule Plugin3 do use Plugin.Builder plugin Plugin1 plugin Plugin2 end acc = Plugin.call(Plugin3, %{}) true = Map.get(acc, :first_fn_passed) true = Map.get(acc, :second_fn_passed)
36. GITHUB.COM/RUBY2ELIXIR/PLUGIN - EXTENSIVE README - UNIT TESTS - SMALL AND WITHOUT DEPENDENCIES GIVE IT A TRY! ;)
37. THIS FINISHES THE PROGRAMMING IN THE SMALL PART
38. PROGRAMMING IN THE LARGE
39. I REALLY LIKE WHAT DAVE THOMAS IS DOING
40. AGILE IS DEAD https://www.youtube.com/watch?v=a-BOSpxYJ9M
41. BE CAREFUL WITH EXPERTS! THEY FORGET TO HAVE FUN. THEY KNOW THEIR ANSWERS… BUT PROBABLY NOT YOURS…
42. HAVE THE GUTS TO PUSH BACK COMPLEXITY AND FIND YOUR OWN WAY…
43. ANOTHER NICE ARTICLE ABOUT INCREASED PERCEIVED COMPLEXITY IN SOFTWARE DEVELOPMENT…
44. FROM THE AUTHOR OF
45. http://ferd.ca/the-little-printf.html
47. That is exactly the way I wanted it!
48. Printf, who's now sitting right in front of me, is on his way home. Talking with him made me realize how much of what I do flies in the face of what I liked, what I started programming for. Each of the people Printf met are roles I see myself taking one day or another over time. I was encouraged by them to become them, and probably encouraged people to do the same. Where I got dragged in the game of trying to become a real programmer, Printf didn't. He said he was okay with not being a real programmer, that he preferred to be a programmer with a human face.
49. I REALLY THINK ELIXIR/ERLANG CHANGES THE GAME
50. THE PERFORMANCE<>PRODUCTIVE TRADEOFF IS GONE
51. WRITE GOOD CODE AND STILL STAY FAST IN PRODUCTION
52. LESS LIBRARIES REQUIRED, BETTER BASIC FOUNDATION
53. I COULD GO ON FOR HOURS ABOUT ELIXIR AND BENEFITS…
54. BUT THAT WOULD NOT HELP MUCH
55. THE TECHNOLOGY IS ALREADY HERE
56. MUCH MORE SOLID THAN RUBY WAS IN 2005
57. BUT PUBLIC PERCEPTION IS STILL LAGGING…
58. - NO DEVELOPERS - NO BIG CORPORATION BEHIND - FUNCTIONAL ERLANG WTF - NO OBJECTS OMG! TYPICAL FEARS (MANAGERS)
59. - FEW JOBS - TIME INVESTMENT UNCLEAR - FEW LIBRARIES - FEW STACKOVERFLOW ANSWERS… - NO DEVISE/ACTIVE_ADMIN/ETC… TYPICAL FEARS (DEV)
60. - RUBY2ELIXIR.GITHUB.IO/ - @RUBY2ELIXIR - 179 FOLLOWERS - GITHUB.COM/RUBY2ELIXIR RUBY2ELIXIR
61. - BLOG TO HAVE DEV TESTIMONIALS IN ONE PLACE - TWITTER ACCOUNT TO HAVE A TIMELINE OF THE PUBLIC PERCEPTION - GITHUB TEAM TO COLLECT GOOD / USEFUL LIBRARIES IN ONE PLACE RUBY2ELIXIR
62. - ONLY SOME MUCH CAN BE DONE BY A SINGLE PERSON - STILL NOT A VERY EFFECTIVE STRATEGY TO MAKE ELIXIR MORE POPULAR CONCERNS
63. WHAT ELSE CAN WE DO TO MAKE ELIXIR MORE POPULAR?
64. REALLY, THIS IS OUR RESPONSIBILITY. WE DEVELOPERS SHAPE THE WORLD. OUR OPINIONS MATTER.
65. - - DEVELOPERS! - - DEVELOPERS! - - DEVELOPERS! Steve Ballmer
66. FEED A MAN AND YOU HAVE TO FEED HIM EVERYDAY. TEACH HIM FISHING AND HE’LL BE SET FOR LIFE… OR SOMETHING LIKE THIS ;)
67. LET’S MAKE ELIXIR GO VIRAL!
68. LET’S GIVE ELIXIR WORKSHOPS FOR FREE.
69. THE PRICE FOR AN ATTENDEE: HE’LL HAVE TO GIVE A WORKSHOP IN RETURN
70. EVEN IF IT IS 10 MINUTES ELIXIR INTRODUCTION TO YOUR MUM…
71. SPREAD THE LOVE!
72. EXPECTED RESULT: - ELIXIR INSTALLED ON SOMEBODY’S LAPTOP - THEY HAVE USED THE BASICS IN IEX - THEY HAVE A STANDARD SURVIVAL KIT TO GIVE A WORKSHOP THEMSELVES
73. NEXT STEPS: VIRALELIXIR.ORG -> COMMUNITY FOR ELIXIR WORKSHOP GIVERS!
74. VIRALELIXIR.ORG LET’S MAKE IT HAPPEN!
75. ABOUT SPEAKER Roman Heinrich ELIXIR ENTHUSIAST RUBY DEVELOPER REACT.JS LOVER DEVOPS GUY GITHUB.COM/MINDREFRAMER TWITTER.COM/MINDREFRAMER DEVOPSBOX.ES