On Thu, 04 Sep 2014 21:42:56 +1000, Chris Angelico wrote: > On Thu, Sep 4, 2014 at 9:17 PM, Denis McMahon <denismfmcma...@gmail.com> > wrote: >> On Wed, 03 Sep 2014 07:16:34 +0000, Steven D'Aprano wrote: >> >>> Who uses + for disjunction (∨ OR) and concatenation for conjunction (∧ >>> AND)? That's crazy notation. >> >> The way I was taught it in the mid 1980s, a.b === a and b, a+b === a or >> b. > > The middle dot is another notation for multiplication, as is abuttal > (not actually concatenation, in this context). So they're all saying the > same thing: boolean 'and' is multiplication, boolean 'or' is addition.
Yes Chris, I know that. I was responding to Stephen's statement that using + for or was crazy notation, and pointing out that 30 years ago, that's what UK colleges were teaching! -- Denis McMahon, denismfmcma...@gmail.com -- https://mail.python.org/mailman/listinfo/python-list
