Complexity - Speaker Deck

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@jcinnamond Complexity

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As a business

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As a business I want A/B testing on the   homepage

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As a business I want A/B testing on the   homepage Because business

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GREAT!

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There’s a GEM  for that GREAT!

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source 'https://rubygems.org' gem 'rails', '4.2.5.2' group :development, :test do gem 'byebug' end

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source 'https://rubygems.org' gem 'rails', '4.2.5.2' group :development, :test do gem 'byebug' end gem 'ab-testing-because-business'

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$ 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

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rails g ab-testing:init invoke ab_test_all_the_things modify app/views/homepage.html.erb convert_all_the_users $

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rails g ab-testing:init invoke ab_test_all_the_things modify app/views/homepage.html.erb convert_all_the_users $ :shipit:

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Everyone is happy

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Everyone is happy Everything is EASY

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As a user

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As a user I want some copy  changed

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As a user I want some copy  changed Because reasons

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GREAT!

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There’s a GEM  for that GREAT!

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source 'https://rubygems.org' gem 'rails', '4.2.5.2' gem 'ab-testing-because-business' group :development, :test do gem 'byebug' end

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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'

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$ 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…

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AwesomeCopyChange.config do |config| change 'romanus eunt domus', to: 'romani ite domum' end config/initializers/awesome_copy_change.rb

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AwesomeCopyChange.config do |config| change 'romanus eunt domus', to: 'romani ite domum' end config/initializers/awesome_copy_change.rb :shipit:

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Everyone is happy

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Everyone is happy Everything is EASY

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47% of rails development is installing gems* * I totes just made this up

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$ grep -c '^\s*gem' Gemfile 40 $ bundle list | grep -c '\*' 122

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$ bundle install --path=vendor/bundle ...

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$ bundle install --path=vendor/bundle ... $ find vendor/bundle/ruby/2.3.0/gems -name \*.rb |

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$ bundle install --path=vendor/bundle ... $ find vendor/bundle/ruby/2.3.0/gems -name \*.rb | egrep -v 'spec|test' |

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$ bundle install --path=vendor/bundle ... $ find vendor/bundle/ruby/2.3.0/gems -name \*.rb | egrep -v 'spec|test' | wc -l

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$ bundle install --path=vendor/bundle ... $ find vendor/bundle/ruby/2.3.0/gems -name \*.rb | egrep -v 'spec|test' | wc -l 4234

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$ find vendor/bundle/ruby/2.3.0/gems -name \*.rb | egrep -v 'spec|test' |

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$ find vendor/bundle/ruby/2.3.0/gems -name \*.rb | egrep -v 'spec|test' | xargs cat |

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¯\_(ϑ)_/¯

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$ find app -name '*.rb' | xargs cat | grep -v '^\s*#' | grep -v '^\s*$' | wc -l 1007

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100% Our code Other people's code

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0 100000 200000 300000 400000 Code that's been through our PR process Code that hasn't

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Projects get COMPLEX

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Rails projects get COMPLEXERERER

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GEMS  aren't the problem

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Solve problems by DOING STUFF

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Solve problems by DOING STUFF Adding a gem

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Solve problems by DOING STUFF Adding a gem Running scripts

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Solve problems by DOING STUFF Adding a gem Running scripts Writing code

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Solve problems by DOING STUFF Adding a gem Running scripts Writing code ADDING COMPLEXITY

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COMPLEXITY KILLS PROJECTS

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Avoid complexity by

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Avoid complexity by DOING LESS STUFF

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Avoid complexity by DOING LESS STUFF THINKING MORE

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Avoid complexity by DOING LESS STUFF THINKING MORE CARING MORE

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This takes time

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Nobody is happy

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Nobody is happy Nothing is EASY

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AVOIDING COMPLEXITY isn't always  the right thing

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But it's about balance

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COMPLEXITY KILLS PROJECTS

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COMPLEXITY KILLS PROJECTS nobody likes a dead project

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Great!   There's a   gem for this

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I can bash   out out   some code

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maybe don't think that I can bash   out out   some code

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try thinking   about the   problem I can bash   out out   some code

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try to ﬁnd  the SIMPLE  solution I can bash   out out   some code

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IN THE SHORT TERM nobody cares

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IN THE LONG TERM your project depends on it

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Thank you Complexity @jcinnamond Bath Ruby 2016