On 10/07/2012 08:00 PM, Jan Karel Schreuder wrote: > > > On Oct 7, 2012, at 7:24 PM, Dave Angel <d...@davea.name> wrote: > >>>>> >>>> >> >> It still makes no sense to me. There are at least two equally silly >> ways to define the results of a negative modulus, and you've properly >> described one of them, presumably the one that Python implements. >> >> But I've used and abused about 35 languages over the years, and each >> makes its own choice for this. I'd rather just call it undefined, and >> eliminate it. That's what we did when the hardware guys couldn't decide >> how the hardware was going to respond to a particular microcode bit >> pattern. They documented it as undefined, and I made it illegal in the >> microcode assembler. >> >> Fortunately, the OP isn't asking about this case, which is the other >> reason I didn't bother to describe what Python does. >> >> >> >> -- >> >> DaveA >> _______________________________________________ >> I'm not a professional programmer, so I might be way off base here. But what >> I like about Pythons modulo solution is that I can use it to right and left >> shift in lists or tuples, and I will link to the first element when I right >> shift past the last element and link to the last element when I left shift >> past the first element. In other words I can consider the last as a chain >> where the last and the first element are connected. This I find useful in >> surprisingly many situations. > > Certainly, but you've never had to do that with lists or tuples having negative lengths. It's a negative modulus that I'm complaining about.
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