... Any idea's?

Go ahead :) try someting from perlintro#Simple matching, perlintro#Simple substitution, perlintro#More complex regular expressions and perlrequick...perlintro#Writing subroutines and http://learn.perl.org/books/beginning-perl/ Chapter 8: Subroutines, https://metacpan.org/pod/Text::CSV_XS#csv