chad

class Thing
  def do_something
    puts "Doing something in Thing"
  end
end

class SubThing < Thing
end

chad

module Friendly
 def greet
   puts "Hello World!"
  end 
end

class HelloWorld
  include Friendly
end

chad

class ActiveRecord::Base
  is_paranoid
end

chad

def is_paranoid opts = {}
  # ...snip...
  include InstanceMethods
end

module InstanceMethods
  # snip snip snip
  def destroy
    # ....etc.
  end

chad

class Thing
  def do_something
    puts "Doing something in Thing"
  end
end

class SubThing < Thing
end

module IneffectiveOverride

chad

def start
  puts "Starting round #{@rounds + 1}"
  say('start', 5)
  3.times do |minute|
    sleep 60
    say("Ending minute #{minute + 1}")
  end
  @rounds += 1
end

chad

require 'test/unit'
class TestMe < Test::Unit::TestCase
end if
class Me
  def a_method
    
  end
  false
end

chad

require 'pathname'
class FileDB
  class ModuleDefiner
    class ClassDefiner
    end
  end

  class << self
    def from_dir(path)
      with_module_for(module_name_for(path)) do |m|

chad

module ActiveSomething
  class Base
    def self.setup_methods!
      columns = File.readlines("#{self.name}.schema").map do |line|
                   line.chomp.split(/:/)
                 end
      columns.each do |name, column_type|
        instance_eval{attr_accessor name}
      end
    end

chad

# How to find out where a method comes from.
# Learned this from Dave Thomas while teaching Advanced Ruby Studio
# Makes the case for separating method definitions into
# modules, especially when enhancing built-in classes.
module Perpetrator
  def crime
  end
end

class Fixnum