tjsingleton

n.times { doc.add_text(msg) }
n.times { doc.undo }
n.times { doc.redo }

tjsingleton

# modules work! :) If we define_method on a module and include it, it works the same.

class A
  include World
end

module World
  def hello
    puts "World"
  end

tjsingleton

100000 Strings
After Block: 3318
After Forced GC: 31

100000 Symobls
After Block: 1519
After Forced GC: 98619

tjsingleton

# selenium-webclient does not clean up cookies unless your currently on that page.
module CookieRemover
  def self.delete_all(path)
    Capybara.current_session.driver.visit(path)
    Capybara.reset_sessions!
  end
end

After("@external-site") do
  CookieRemover.delete_all("http://www.external-site.com")

tjsingleton

class Value
  attr_reader :value
  def initialize(value)
    @value = value 
  end
  
  def add(i)
    class.self.new(i + @value)
  end
end

tjsingleton

require "json"
file = ARGV[0]
branches = File.open(file) {|f| JSON.parse(f.read).freeze }

LABEL_STRING = '"%s" [label="%s"]'
GRAPH_STRING = '"%s" -> "%s"'
cells = []

puts "digraph graph_example {"

tjsingleton

We have a widget that we want to extend

class Widget
end

so we open it and define_method

class Widget
  define_method :hello do

puts "Hello!"

tjsingleton

modules_to_load = [
  Authlogic::ActsAsAuthentic::SingleAccessToken::Methods::InstanceMethods,
  Authlogic::ActsAsAuthentic::SingleAccessToken::Methods,
  Authlogic::ActsAsAuthentic::SessionMaintenance::Methods,
  Authlogic::ActsAsAuthentic::PersistenceToken::Methods::InstanceMethods,
  Authlogic::ActsAsAuthentic::PersistenceToken::Methods,
  Authlogic::ActsAsAuthentic::PerishableToken::Methods::InstanceMethods,
  Authlogic::ActsAsAuthentic::PerishableToken::Methods,
  Authlogic::ActsAsAuthentic::Password::Methods::InstanceMethods,
  Authlogic::ActsAsAuthentic::Password::Methods,

tjsingleton

A=" on the wall"
def z n
"%s bottle#{"s" if n>1} of beer"%n
end
99.downto(1){|n|a,b,c=n,*n>1?[n-1,"Take one down and pass it around"]:[99,"Go to the store and buy some more"]
d=z a
puts"%s, %s.
"*2%[d+A,d,c,z(b)+A]+"
"}

tjsingleton

class CustomError < StandardError
  def initialize(message = nil)
    message ||=  "Default message."
    super(message)
  end
end