Olivier Lacan olivierlacan

Why is the server unhappy?

Bundle API is 70%-80% of traffic and it has to resolve the dependency graph and Marshal
x Processes are spinning in Ruby with 380% (of 400% total CPU [4 x 100%])
x Bundle can only use vanilla gems, so that's why we have to use Marshal
Redis Heapsize
Diskspace

Timing - middle of the day US

Your class can be no longer than 100 lines of code.
Your methods can be no longer than five lines of code.
You can pass no more than four parameters and you can’t just make it one big hash.
When a call comes into your Rails controller, you can only instantiate one object to do whatever it is that needs to be done. And your view can only know about one instance variable.

You can break these rules if you can talk your pair into agreeing with you.

Update 8/16/2015: I updated this guide a bit and posted it to Medium

A few notes about things I do when I travel to Japan.

Your class can be no longer than a hundred lines of code.
Your methods can be no longer than five lines of code
You can pass no more than four parameters and you can't just make it one big hash.
In your controller, you can only instantiate one object, to do whatever it is that needs to be done.
Your view can only know about one instance variable.
Your Rails view should only send messages to that object i.e., no Demeter violations.[ "thunder dome principal". Translated: one model in, one model out! ]
Rules are meant to be broken if by breaking them you produce better code. [ ...where "better code" is validated by explaining why you want to break the rule to someone else. ]

	# Given a controller in need of refactoring into multiple controllers, how
	# can I redirect to new controller actions based upon a feature flag?
	#
	# The current code "works" but doesn't exercise the controller action.
	#
	# Rails 2.3 or 3.0 methods accepted

	class BetterController
	def overview
	# .. a small amount of auth/permissions code

	# app/controllers/users/password_controller.rb

	class Users::PasswordsController < Devise::PasswordsController
	def resource_params
	params.require(:user).permit(:email, :password, :password_confirmation, :reset_password_token)
	end
	private :resource_params
	end

	def snake_case
	return downcase if match(/\A[A-Z]+\z/)
	gsub(/([A-Z]+)([A-Z][a-z])/, '\1_\2').
	gsub(/([a-z])([A-Z])/, '\1_\2').
	downcase
	end

	"FooBar".snake_case #=> "foo_bar"
	"HeadlineCNNNews".snake_case #=> "headline_cnn_news"
	"CNN".snake_case #=> "cnn"

	# Typically in Rails to use VCR we setup the RSpec config like so:
	RSpec.configure do \|config\|
	config.extend VCR::RSpec::Macros #deprecated
	end

	# This gives us access to the use_vcr_cassette method:
	describe Reviewed::Article do
	use_vcr_cassette 'article/grill'
	end

	module PoltergeistFlash
	module TestHelpers
	def flash_cookie
	cookie = CGI.unescape Capybara.current_session.driver.cookies["flash"].value
	return {} unless cookie
	JSON.parse(cookie).with_indifferent_access
	rescue JSON::ParserError
	{}
	end
	end

	curl https://raw.github.com/gist/3998177/0ac991d732fbfba9f3d8cfd14b861461ef2d9393/2.0.0-preview1 > /tmp/2.0.0-preview1
	rbenv install /tmp/2.0.0-preview1