class Rufus::CronLine

def parse_weekdays (item)
  item = item.downcase
  WDS.each_with_index { |day, index| item = item.gsub(day, index.to_s) }
  r = parse_item(item, 0, 7)
  r.is_a?(Array) ?
    r.collect { |e| e == 7 ? 0 : e }.uniq :
    r
end