>> A xor B := ( A and not B) or ( B and not A)

I only want to leave here an example: although 'logically' they return the same 'Perl-truthness', in this case they won't return same value: 
perl -wle 'my( $A, $B ); print for map "[$_]", ( $A xor $B ), ( $A and
+ not $B or $B and not $A ); '

[download]
output ('' vs. undefined): 
Use of uninitialized value $_ in concatenation (.) or string at -e lin
+e 1.
[]
[]

[download]

In reply to Re^6: 'xor' operator is not a sibling to 'or' and 'and'? by rsFalse
in thread 'xor' operator is not a sibling to 'or' and 'and'? by rsFalse

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