"Steven D'Aprano" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] | On Sat, 08 Mar 2008 17:09:11 -0800, Mark Dickinson wrote: | | > On Mar 8, 6:26 pm, Paul Rubin <http://[EMAIL PROTECTED]> wrote: | >> Alasdair <[EMAIL PROTECTED]> writes: | >> > What is the best way of finding a ceiling of a quotient of arbitrary | >> > sized integers? | >> | >> ceiling(a/b) = (a+b-1)//b | > | > I prefer: | > | > ceiling(a/b) = -(-a)//b
Obvious typo: -(-a)//b == a//b This should be -(-a//b) == -((-a)//b) | Unfortunately it doesn't give the right answer. | Looks like you've confused ceiling() and floor(). | | (And the ease that these mistakes can happen is why such fundamental | functions should be in the standard library, no matter how easy they are | to implement.) I'll let Paul say whether is was a typo, due to answering too quickly, or a logic error, but I suspect the former. *Any* expression can be mistyped. tjr -- http://mail.python.org/mailman/listinfo/python-list
