Vicki Brown wrote: > > # Problem - we want code to validate input. > # In this particular case, the possible input values are > # blastx, blastn, blastp, tblastx, tblastn > # so it looks like a job for a regexp > while (<>){ /t?blast[xn]/ && next; /blastp/ && next; die "$_ : not valid"; } I think that's closer to what the holy camel tome wants of us. ==== Want to unsubscribe from Fun With Perl? ==== Well, if you insist... Send mail with body "unsubscribe" to ==== fwp-request@technofile.org