On Sat, Jan 31, 2009 at 8:33 PM, Robert Rohde <[email protected]> wrote: > This discussion is getting side tracked. > > The real complaint here is that > > {{#expr:(0.00007 * 1000 * 1000) mod 1000}} is giving 69 when it should give > 70. > > This is NOT a formatting issue, but rather it is bug in the #expr > parser function, presumably caused by some kind of round-off error.
$ php -r 'echo (0.00007 * 1000 * 1000) % 1000 . "\n";' 69 $ php -r 'echo (int)(0.00007 * 10000000) . "\n";' 699 The issue is bog-standard floating-point error. If PHP has a decent library for exact-precision arithmetic, we could probably use that. Otherwise, template programmers will have to learn how floating-point numbers work just like all other programmers in the universe. _______________________________________________ Wikitech-l mailing list [email protected] https://lists.wikimedia.org/mailman/listinfo/wikitech-l
