in reply to Re^2: Determining whether a value is zero.
in thread Determining whether a value is zero.

Certainly is interesting that quoted 00 is true while quoted 0 is false (but it sounds like '0', "0" are special cases). 
perl -E 'say 0      ? q{true} : q{false}'  # false
perl -E 'say 00     ? q{true} : q{false}'  # false
perl -E 'say q{0}   ? q{true} : q{false}'  # false
perl -E 'say qq{0}  ? q{true} : q{false}'  # false
perl -E 'say q{00}  ? q{true} : q{false}'  # true
perl -E 'say qq{00} ? q{true} : q{false}'  # true

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