Re^3: Perl Best Practices book: is this one a best practice or a dodgy practice?

[spiritway]

in reply to Re^2: Perl Best Practices book: is this one a best practice or a dodgy practice?
in thread Perl Best Practices book: is this one a best practice or a dodgy practice?

if you allow people to independently specify input and output filenames on the command-line, some of them inevitably will use the same name for both files (either intentionally or accidentally).

Ah, that makes perfect sense now... it's preemptive programming. You're right - someone will eventually do that...