in reply to Re^2: How can I differentiate between 0 and whitespace in Perl?
in thread How can I differentiate between 0 and whitespace in Perl?

Then this should be fixed in perlsyn, because use feature ":5.10" is what you find there. *sigh* The 5.10 vs. 5.010 syntax is nasty.
print+qq(\L@{[ref\&@]}@{['@'x7^'!#2/"!4']});

In Section Seekers of Perl Wisdom