class Rufus::CronLine

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