δΊ 2011-11-5 16:57, Uri Guttman ει:
it isn't confusing. when a system call error occurs, you get an undef return value which says that. then you check $! to see what was the error. clearing $! on all good calls is a waste of cpu since most calls succeed vs the number that fail. the same is true for $@ when an eval fails. you check the return value of the eval and if needed, then check the value of $@ for what the error was.
Then where did it get the error and set up the value of $! in my first post? Thanks again. -- To unsubscribe, e-mail: beginners-unsubscr...@perl.org For additional commands, e-mail: beginners-h...@perl.org http://learn.perl.org/
