dynamically define easy partial helper methods

helpers.rb

  helpers do
    def method_missing(method_name, *args, &block)
      method_str = method_name.to_s
      if method_str =~ /^_.+$/
        options = {}
        options.merge!(args.first) unless args.empty?

        class_eval <<-RUBY
          def #{method_name.to_s}(options={})
            haml :#{method_name}, :locals => args, :layout => false
          end
        RUBY
        send(method_name, options)

      else
        super
      end 
    end 
end