Catmandu::Fix::Condition::marc_match3pm

   # marc_match(MARC_PATH,REGEX)
   # Match when 245 contains the value "My funny title"
   if marc_match('245','My funny title')
        add_field('my.funny.title','true')
   end
   # Match when 245a contains the value "My funny title"
   if marc_match('245a','My funny title')
        add_field('my.funny.title','true')
   end
   # Match when all 650 fields contain digits
   if marc_match('650','[0-9]')
     add_field('has_digits','true')
   end
   # Match when /one/ of the 650 fields contain digits
   do marc_each()
      if marc_all_match('650','[0-9]')
        add_field('has_digits','true')
      end
   end