On Sun, 2006-23-04 at 05:03 -0400, M. Kristall wrote: > John W. Krahn wrote: > > You can make it even shorter: > > > > print/.*/g,$"for<> > They aren't quite the same though. 'while' loops if the condition is > still true (scalar context). 'for' loops if there are more items in the > array (array context). > > while (<>) gets a little extra magic than just the normal <>. > while (<>) is the same as while (local $_ = readline (ARGV)) > for (<>) is the same as for (readline (ARGV)) >
It's more than that. The expression 'for<>' is in array context. That means the entire file is read and stored the first time the expression in encountered. In other words, it does work for large files. The expression 'while(<>)' is in scalar context. It reads the file one line at a time. -- __END__ Just my 0.00000002 million dollars worth, --- Shawn "For the things we have to learn before we can do them, we learn by doing them." Aristotle * Perl tutorials at http://perlmonks.org/?node=Tutorials * A searchable perldoc is at http://perldoc.perl.org/ -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] <http://learn.perl.org/> <http://learn.perl.org/first-response>
