# File lib/icalendar/parser.rb, line 78
    def parse_weekday_list(name, string)
      match = string.match(/;#{name}=(.*?)(;|$)/)
      if match
        match[1].split(",").map {|weekday| 
          wd_match = weekday.match(/([+-]?\d*)(SU|MO|TU|WE|TH|FR|SA)/)
          Weekday.new(wd_match[2], wd_match[1])
          }
      else
        nil
      end
    end