gistfile1.rb

    class Logger

      LEVELS = [:debug, :info, :warn, :error, :fatal]

      attr_accessor :level

      def initialize(name)
        @name = name
        @level = :info
      end

      def level= level
        @level = level.is_a?(Fixnum) ? LEVELS[level] : level.to_sym
      end

      LEVELS.each do |level|
        define_method(level) do |*msg, &block|
          return  if LEVELS.index(level.to_sym) < LEVELS.index(@level.to_sym)
          msg = block ? block.call : msg.join
          puts "#{@name} #{level}: #{msg}"
        end
      end

    end