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Re^4: What is true and false in Perl? (undef,undef)

by amartyaj (Initiate)
on Nov 22, 2013 at 18:00 UTC ( #1063972=note: print w/ replies, xml ) Need Help??


in reply to Re^3: What is true and false in Perl? (undef,undef)
in thread What is true and false in Perl?

Hi can somebody explain to me the reason behind the following: test.pl: #!/usr/bin/perl my $a = (1==0); print "__".ref($a)."__\n"; Output: ____


Comment on Re^4: What is true and false in Perl? (undef,undef)
Re^5: What is true and false in Perl? (undef,undef)
by davido (Archbishop) on Nov 22, 2013 at 18:11 UTC

    What do you think ref does?

    In your example code, $a doesn't contain a reference. It contains a false value. ref does exactly this: "Returns a non-empty string if EXPR is a reference, the empty string otherwise."


    Dave

      Got it. Thanks a lot Dave.

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