in reply to
making my suroutine and parts of my program case insensitive.
Change your first regex to /$_/ig. Note the i-modifier (which tells it to match case insensitively). Another option is to uc() or lc() all input data and then compare.
Compiling them myself
Merijn's HP-UX software
Whatever is shipped with my OS release
None, i use PerlScript
Results (170 votes),