On Jun 17, 10:05 am, pdpi <pdpinhe...@gmail.com> wrote: > On Jun 17, 5:37 pm, Lie Ryan <lie.1...@gmail.com> wrote: > > > > > Steven D'Aprano wrote: > > > On Tue, 16 Jun 2009 22:46:14 -0700, William Clifford wrote: > > > >> I was staring at a logic table the other day, and I asked myself, "what > > >> if one wanted to play with exotic logics; how might one do it?" > > > > This might be useful for you, and if not useful, at least it might blow > > > your mind like it did mine. > > > > (This is not original to me -- I didn't create it. However, I can't find > > > the original source.) > > > > Imagine for a moment that there are no boolean values. > > > There are no numbers. They were never invented. > > > There are no classes. > > > There are no objects. > > > There are only functions. > > > > Could you define functions that act like boolean values? And could you > > > define other functions to operate on them? > > > > def true(x, y): > > > return x > > > > def false(x, y): > > > return y > > > > def print_bool(b): > > > print b("true", "false") > > > String isn't considered object? > > > Also, b/true()/false() is a function object, isn't it? Unless function > > is first-class, you can't pass them around like that, since you need a > > function pointer (a.k.a number); but if function is first-class then > > there it is an object. > > What Steven was doing was implementing some of the more basic stuff > from Lambda calculus in python. If you're implementing a different > system in an existing language, you'll need to use _some_ facilities > of the original language to interface with the outside world.
Sir! Entropy levels are approaching dangerously low levels. We don't even have enough entropy to fi -- http://mail.python.org/mailman/listinfo/python-list