hash.rb

class Hash
  def method_missing name, *args
    if name.to_s =~ /=$/ # eg. @hash.foo = 'bar'
      self[$`.to_s] = args.first
    else
      if args.empty?
        self[name.to_s] # eg. @hash.foo
      else
        super # anything else ... fall back to super
      end
    end
  end
end