This way the conditions are evaluated less times

Eh? Not so. 

$ perl -le 'print "T" if (print "foo" xor print "bar")'
foo
bar

$ perl -le 'print "T" if ((print "foo" and not print "bar") or (not pr
+int "foo" and print "bar"))'
foo
bar
foo

[download]
At best, the expanded version will result in the same number of evaluations. 

-sauoq
"My two cents aren't worth a dime.";

In reply to Re: Re: Re: Anyone use "xor" in conditionals? by sauoq
in thread Anyone use "xor" in conditionals? by bsb

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