caius

def output name=((default=true); "caius")
  puts "name: #{name.inspect}"
  puts "default: #{default.inspect}"
end

output
# >> name: "caius"
# >> default: true

output "avdi"

ryanb

$('#products').append('<%= j render(@products) %>');
<% if @products.next_page %>
  $('.pagination').replaceWith('<%= j will_paginate(@products) %>');
<% else %>
  $('.pagination').remove();
<% end %>

avdi

def maybe_a_sandwich
  nil
end

# Methods that might return nil are annoying. We want to write a nice
# confident chain:

result = nil
result = maybe_a_sandwich.add_horseradish.get_into_my_belly! rescue $! 
result # => #<NoMethodError: undefined method `add_horseradish' for nil:NilClass>

dkubb

rvm use @$(basename `pwd`) --create

jcasimir

Polymorphism

Sometimes relationships need to be flexible, and that's where we look to polymorphism. Say we want to implement:

• A Person
• A Company
• A PhoneNumber that can connect to a Person or a Company

At the Database Level

protocool

/**
  Sample Propane caveatPatchor.js file based on tmm1's avatar hack.

  You'll need at least version 1.1.1 to experiment with this:
  http://propaneapp.com/appcast/Propane.1.1.1.zip
 
  Once I'm sure exposing this hack-injection point doesn't cause problems
  I'll do an official auto-updating version.

  As of version 1.1.1, Propane will load and execute the contents of

patmaddox

# Functional test just to demonstrate that everything is hooked up

describe UsersController, "POST create", :type => :controller do
  before(:each) do
    UsersController.dispatcher = DefaultDispatcher
  end

  context "successful" do
    it "should create a user" do
      lambda {