in reply to Re^2: looking for a good idiom: return this if this is true
in thread looking for a good idiom: return this if this is true

It returns the equivalent of an empty list, which in a scalar context, is undef. 
my $x = ();

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Sets $x to undef.

-- Randal L. Schwartz, Perl hacker
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In Section Seekers of Perl Wisdom