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

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

ruby-1.9.2-p0 > User.new.save!
ActiveRecord::RecordInvalid: Validation failed: Email is too short (minimum is 6 characters), Email should look like an email address., Email is too short (minimum is 3 characters), Email should use only letters, numbers, spaces, and .-_@ please., Password is too short (minimum is 4 characters), Password confirmation is too short (minimum is 4 characters), First name can't be blank, Last name can't be blank, Company name can't be blank, User type is not included in the list, Company size is not included in the list, Industry is not included in the list

tjsingleton

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