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$a = 0; $b = 0; $c = $a++ && $b++; # only $a++ is evaluated print "a = $a, b = $b\n"; # prints "a = 1, b = 0"
$a = 0; $b = 0; $c = ++$a || ++$b; # only ++$a is evaluated print "a = $a, b = $b\n"; # prints "a = 1, b = 0"
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