My .irbrc file

.ircrb

require 'rbconfig'
Config = RbConfig

if defined?(Rails)
  Dir.glob("#{Rails.root}/app/models/**/*.rb").each { |file| require file }
end

def clear
  system 'clear'
  nil
end
            
begin
  require 'hirb' 

  Hirb.enable  
  extend Hirb::Console  

  def render(table) 
    Hirb::Helpers::AutoTable.render(table)
  end  
rescue Exception => e
  # no Hirb for you!
end

class Class
  def extend?(klass)
    not superclass.nil? and ( superclass == klass or superclass.extend? klass )
  end
end

def models 
  Module.constants.select do |constant_name|
    constant = eval constant_name.to_s
    if not constant.nil? and constant.is_a? Class and constant.extend? ActiveRecord::Base
      constant
    end
  end
end