On Fri, Jan 31, 2014 at 9:09 AM, Roy Smith <r...@panix.com> wrote: > On Thursday, January 30, 2014 10:09:03 AM UTC-5, Steven D'Aprano wrote: >> `(x+1 > 0) and (y >= 5)` > > Me: >> this is even simpler: >> (x > -1) and (y >= 5) > > On Thursday, January 30, 2014 2:03:42 PM UTC-5, Chris Angelico wrote: >> Be careful; that's not the same thing. > > In what way? I'm assuming x is some numeric type. And further assuming it's > not some humungous floating point value, so we run into precision issues.
Now you're changing the problem domain :) Like I said, if it's an integer, you definitely will get the same result from each of the above; but that doesn't mean the expressions are equivalent. They just might happen to produce the same result for values within some particular domain. (I wouldn't even be 100% confident that it's valid for any numeric type, though I can't think of any float values that it would break on, and complex and int are unorderable anyway.) ChrisA -- https://mail.python.org/mailman/listinfo/python-list
