a logger with no if statements

gistfile1.txt

require 'active_support/core_ext/string'

module Logger
  class Null
    def initialize
      @blob = {}
    end

    def unknown(*); end
    def fatal(*); end
    def error(*); end
    def warn(*); end
    def info(*); end
    def debug(*); end
  end

  %w(unknown fatal error warn info debug).reduce(Null) do |ancestor, name|
    klass = Class.new(ancestor) do
      define_method(:initialize) do
        super()
        @blob[name] = []
      end

      define_method(name) {|msg| @blob[name] << msg}
    end
    const_set(name.classify, klass)
  end
end