crontab string eval

gistfile1.rb

class Foo
  def schedule
    # crontab like string, e.g. "5 * * * *"
  end
  
  def run?(time)
    fields = schedule.split(/\s+/)

    !%w(min hour day month wday).map.with_index do |name, i|
      fields[i].gsub(/(?:(?![\d\/\*,]).)*/, '').split(',').select do |v|
        now = time.send(name.to_sym).to_s
        v.gsub(/\*/, now) == now
      end.size > 0
    end.include?(false)
  end
end