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Re: 7 logical-xor implementations in source tree

From: Yuri Khan
Subject: Re: 7 logical-xor implementations in source tree
Date: 2019年7月23日 18:01:05 +0700 
On Tue, Jul 23, 2019 at 5:44 PM Basil L. Contovounesios <address@hidden> wrote:
> Most people seem to define n-ary xor as a parity check (i.e. its result
> is non-nil if the number of non-nil arguments is odd).
The other interpretation, based on the literal meaning of "exclusive
or", is that the result is non-nil if exactly one argument is non-nil.
(Could actually return that one argument as the result.)
With both interpretations, a vacuous xor is nil.
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