using Doulos TREV

i downloaded Doulos trev-tcl regexp gui- but i cant get it started. is there any prefix and suffix that should be added to the regexp in order t开发者_运维问答o get a match with the search string?

With Tcl's usual RE matching strategy, it looks for a match anywhere in the string (i.e., matches are not anchored unless you specifically ask for it). If your match space is “abcde” then using an RE of “c” should match the third letter only. I suggest trying something equally simple to start out with.