On Tue, 04 Dec 2007, [EMAIL PROTECTED] wrote:
> It's also a cautionary tale - if you're using the default "$_" in for
> loops, you can munge your original data.
> foreach my $foo ( @foo ) {
> $foo =~ s/SID/12345/;
> }
>
> this doesn't mess w/ @foo.
That is not correct; it will still modify @foo. It only protects
you against functions that you might call inside of your for() loop
from messing with your values via $_, which is a global variable
in Perl 5.8.
Note that you can have a lexical $_ in 5.10:
foreach my $_ ( @foo ) {
s/SID/12345/;
}
Cheers,
-Jan
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