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On 01/12/2012 20:50, Dirk Laurie wrote:

1. To convert a Lua value to boolean:

     bool = not not x

2. Exclusive or of Lua values x and y

     xor = not x == not y

Anything better?


(aside the (slight) formula error [1])
I never have any use for xor in practice. What examples usage do you have? (I really ask, i'm interested in knowing when & where we may need it, whether it is worth having it built in a prog lang). 

Denis

[1] Of the kind I typically do myself, reason why I would rather code this KISS:
    x_xor_y = (x or y) and not (x and y)
Or: this is one usage case for Lua macros ;-)