sub blah{print +shift;}

my $word = 'BLAHBLAH';
blah( do{ (local $_= $word) =~ s/BLAH/COW/g; $_} );
# prints COWCOW
print $word;
# prints BLAHBLAH
[download]

PerlMonks lovingly hand-crafted by Tim Vroom.
PerlMonks went on a couple dates, and then decided to shack up with The Perl Foundation.
Marvelous Managed Hosting and Bandwidth Generously Provided by pair Networks
Built with the Perl programming language.