[NAME] ALL.dao.type.string.pattern.submatch [TITLE] string.submatch() [DESCRIPTION] 1 string.submatch( pt :string, group :int, start=0, end=0 ) => tuple<start:int,end:int,substring:string> Find a substring that matches to pt, between starting position start and ending position end, and extract the location of substring that matches the pattern group as specified by group.