2. Exclusive or of Lua values x and y
xor = not x == not y
I have read this one several times to be sure I am not missing something obvious.
For me, not x == not y computes the *negation* of the exclusive OR !
The formula should be:
xor := not x ~= not y
--
-- Patrick Rapin
-- coauthor of "Le guide de Lua et ses applications", D-BookeR