humanize_time_answer.rb

require 'time'
class Time
  private
    def hour_to_words(hr)
      puts self
      case hr
      when 12 then "noon"
      when 0,24 then "midnight"
      else ['zero','one','two','three','four','five','six','seven',
          'eight','nine','ten','eleven'][hr % 12]
      end
    end
  public
  def humanize
    "About " +
      case self.min # what minute is it?
      when 0..7   then "#{hour_to_words(hour)}"
      when 8..22  then "a quarter after #{hour_to_words(hour)}"
      when 23..37 then "half past #{hour_to_words(hour)}"
      when 38..52 then "a quarter til #{hour_to_words(hour+1)}"
      when 53..59 then "#{hour_to_words(hour+1)}"
      end
  end
end