in reply to How do I extract ORFs from a fasta file into a new fasta file

(Copied from my post in this thread: how do i obtain blast result from the given file.)

If you're looking for some good books, I can highly recommend these 3 books which form a 3 part series:
Learning Perl: Making Easy Things Easy and Hard Things Possible
Intermediate Perl: Beyond The Basics of Learning Perl
Mastering Perl: Creating Professional Programs with Perl

I just happened to notice this. I have no idea what it it like, but it might be just what you want:
Mastering Perl for Bioinformatics