dwg

# Base class
class DynamicHostMailer < ActionMailer::Base
	def initialize method_name=nil, host, *args
		@host = host
		super method_name, *args
	end

	def url_options
		# Host should be checked against a relevant whitelist, this is only an example
		{ host: @host }

dwg

module AssociationPrimaryKey
  module ActiveRecord
    private
    
    def create_has_many_reflection(association_id, options, &extension)
      options.assert_valid_keys(
        :class_name, :table_name, :foreign_key, :primary_key,
        :dependent,
        :select, :conditions, :include, :order, :group, :limit, :offset,
        :as, :through, :source, :source_type,

dwg

module FlashHelper
  def embed_flash swf, options={}, &block
    outer_options = options.slice(:id, :width, :height).merge(:classid=>'clsid:D27CDB6E-AE6D-11cf-96B8-444553540000')
    inner_options = options.slice(:width, :height).merge(:type=>'application/x-shockwave-flash', :data=>swf)
    params = options[:params] && options[:params].map {|name, value| tag(:param, :name=>name, :value=>value)}.join || ''
    if block_given?
      embed_flash_with_block swf, outer_options, inner_options, params, &block
    else
      embed_flash_without_block swf, outer_options, inner_options, params
    end

dwg

# Drop the following in an initializer and enjoy consistency and less code when marking up forms.
# <% form_for @user do |f| %>
#   <%= f.text_field :username %>
#   <%= f.check_box :terms_accepted, :label=>'I accept the terms' %>
#   <%= f.submit 'Save' %>
# <% end %>
# produces
# <form ...>
#   <p>
#     <label for="user_username">Username</label><br/>