overture8

require 'md5'
module CommentsHelper
  def gravatar_url_for(email = null, size = 80)
    hash = MD5::md5(email.downcase)
    image_src = "http://www.gravatar.com/avatar/#{hash}?s=#{size}"
  end
end

overture8

<%= image_tag(gravatar_url_for(comment.email)) %>

overture8

map.connect 'archives/:year/:month',
    :controller => 'posts',
    :action => 'find_by_date',
    :year => /\d{4}/,
    :month => /(jan|feb|mar|apr|may|jun|jul|aug|sep|oct|nov|dec)/

overture8

def find_by_date
  @posts = Post.find(:all, 
    :conditions => ["monthname(created_at) = ? AND year(created_at) = ?", 
                 params[:month], params[:year]])
  render :action => "index"
end

overture8

def to_param
  "#{id}-#{title.gsub(/[^a-z0-9]+/i, '-')}"  
end

overture8

class Report
  def create_report
    # Left blank, sub-classes will implement this
  end
end

class XmlReport < Report
  def create_report
    puts "I am an Xml Report"
  end

overture8

class ReportGenerator
  def print_report(report_type)
    report_type.create_report
  end
end

overture8

rep_gen = ReportGenerator.new
my_reports = [XmlReport.new, TextReport.new, HtmlReport.new, PdfReport.new]

my_reports.each do |report|
  rep_gen.print_report(report)
end

overture8

user = User.find(1)
user_orders = user.orders

overture8

<div class="span-6"></div>