xor

Function

Package: excl

Arguments: &rest forms

This function returns true is an odd number of fomrs evaluate to a true value. (Logically, an xor expression with two arguments is true when one argument is true and the other false. The name comes from `exclusive or', meaning one or the other but not both. This function takes any number of arguments, and returns the result of xor'ing the first two, then the result of that with the next, and so on, which works out to true if an odd number of the arguments are true.)

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Created 2000.10.5.