Complexity

A short talk about complexity, delivered at Bath Ruby 2016

Transcript

1. @jcinnamond Complexity
2. As a business
3. As a business I want A/B testing on the 
 homepage
4. As a business I want A/B testing on the 
 homepage Because business
5. GREAT!
6. There’s a GEM
 for that GREAT!
7. source 'https://rubygems.org' gem 'rails', '4.2.5.2' group :development, :test do gem 'byebug' end
8. source 'https://rubygems.org' gem 'rails', '4.2.5.2' group :development, :test do gem 'byebug' end gem 'ab-testing-because-business'
9. $ bundle install Using rake 10.5.0 Using rails 4.2.5.2 Installing ab-testing-because-business Using node 6.0.1 Using vb.net 14.0 Using microsoft-iis 5.1
10. rails g ab-testing:init invoke ab_test_all_the_things modify app/views/homepage.html.erb convert_all_the_users $
11. rails g ab-testing:init invoke ab_test_all_the_things modify app/views/homepage.html.erb convert_all_the_users $ :shipit:
12. Everyone is happy
13. Everyone is happy Everything is EASY
14. As a user
15. As a user I want some copy
 changed
16. As a user I want some copy
 changed Because reasons
17. GREAT!
18. There’s a GEM
 for that GREAT!
19. source 'https://rubygems.org' gem 'rails', '4.2.5.2' gem 'ab-testing-because-business' group :development, :test do gem 'byebug' end
20. source 'https://rubygems.org' gem 'rails', '4.2.5.2' gem 'ab-testing-because-business' group :development, :test do gem 'byebug' end gem 'awesome-copy-change'
21. $ bundle install Using rake 10.5.0 Using peoples-front-of-judea 1.4.3 Using judean-peoples-front 2.1.0 Using judean-popular-peoples-front 0.9 Using ab-testing-because-business 1.0 Installing awesome-copy-change 0.1 Using romanes-eunt-domus 1.0.0-beta3 A møøse once bit my sister…
22. AwesomeCopyChange.config do |config| change 'romanus eunt domus', to: 'romani ite domum' end config/initializers/awesome_copy_change.rb
23. AwesomeCopyChange.config do |config| change 'romanus eunt domus', to: 'romani ite domum' end config/initializers/awesome_copy_change.rb :shipit:
24. Everyone is happy
25. Everyone is happy Everything is EASY
26. 47% of rails development is installing gems* * I totes just made this up
27. $ grep -c '^\s*gem' Gemfile 40 $ bundle list | grep -c '\*' 122
28. $ bundle install --path=vendor/bundle ...
29. $ bundle install --path=vendor/bundle ... $ find vendor/bundle/ruby/2.3.0/gems -name \*.rb |
30. $ bundle install --path=vendor/bundle ... $ find vendor/bundle/ruby/2.3.0/gems -name \*.rb | egrep -v 'spec|test' |
31. $ bundle install --path=vendor/bundle ... $ find vendor/bundle/ruby/2.3.0/gems -name \*.rb | egrep -v 'spec|test' | wc -l
32. $ bundle install --path=vendor/bundle ... $ find vendor/bundle/ruby/2.3.0/gems -name \*.rb | egrep -v 'spec|test' | wc -l 4234
33. $ find vendor/bundle/ruby/2.3.0/gems -name \*.rb | egrep -v 'spec|test' |
34. $ find vendor/bundle/ruby/2.3.0/gems -name \*.rb | egrep -v 'spec|test' | xargs cat |
35. $ find vendor/bundle/ruby/2.3.0/gems -name \*.rb | egrep -v 'spec|test' | xargs cat | grep '^\s*def\b' |
36. $ find vendor/bundle/ruby/2.3.0/gems -name \*.rb | egrep -v 'spec|test' | xargs cat | grep '^\s*def\b' | wc -l
37. $ find vendor/bundle/ruby/2.3.0/gems -name \*.rb | egrep -v 'spec|test' | xargs cat | grep '^\s*def\b' | wc -l 35454 (methods)
38. $ find vendor/bundle/ruby/2.3.0/gems -name \*.rb | egrep -v 'spec|test' | xargs cat | grep '^\s*def method_missing\b' | wc -l 35454 (methods) 93 (method_missing)
39. $ find vendor/bundle/ruby/2.3.0/gems -name \*.rb | egrep -v 'spec|test' | xargs cat | grep '^\bdefine_method\b' | wc -l 35454 (methods) 93 (method_missing) 205 (define_method)
40. ¯\_(ϑ)_/¯
41. $ find app -name '*.rb' | xargs cat | grep -v '^\s*#' | grep -v '^\s*$' | wc -l 1007
42. $ find vendor/bundle/ruby/2.3.0/gems -name \*.rb | egrep -v 'spec|test' | xargs cat | grep -v '^\s*#' | grep -v '^\s*$' | wc -l 377195
43. 100% Our code Other people's code
44. 0 100000 200000 300000 400000 Code that's been through our PR process Code that hasn't
45. Projects get COMPLEX
46. Rails projects get COMPLEXERERER
47. GEMS
 aren't the problem
48. Solve problems by DOING STUFF
49. Solve problems by DOING STUFF Adding a gem
50. Solve problems by DOING STUFF Adding a gem Running scripts
51. Solve problems by DOING STUFF Adding a gem Running scripts Writing code
52. Solve problems by DOING STUFF Adding a gem Running scripts Writing code ADDING COMPLEXITY
53. COMPLEXITY KILLS PROJECTS
54. Avoid complexity by
55. Avoid complexity by DOING LESS STUFF
56. Avoid complexity by DOING LESS STUFF THINKING MORE
57. Avoid complexity by DOING LESS STUFF THINKING MORE CARING MORE
58. This takes time
59. Nobody is happy
60. Nobody is happy Nothing is EASY
61. AVOIDING COMPLEXITY isn't always
 the right thing
62. But it's about balance
63. COMPLEXITY KILLS PROJECTS
64. COMPLEXITY KILLS PROJECTS nobody likes a dead project
65. Great! 
 There's a 
 gem for this
66. I can bash 
 out out 
 some code
67. maybe don't think that I can bash 
 out out 
 some code
68. try thinking 
 about the 
 problem I can bash 
 out out 
 some code
69. try to find
 the SIMPLE
 solution I can bash 
 out out 
 some code
70. IN THE SHORT TERM nobody cares
71. IN THE LONG TERM your project depends on it
72. Thank you Complexity @jcinnamond Bath Ruby 2016