The most challenging date math we've faced recently (a real project) is the ISO 8601 week calculation. Extremely easy to introduce an off-by-one error!
On Sat, Dec 14, 2013 at 11:13 AM, Wols Lists <antli...@youngman.org.uk>wrote: > On 14/12/13 16:48, Dan Fitzgerald wrote: > > Kevin: I'd take the month (verifying; gigo), then run it through a case > statement to determine the number of days in that month (sounds like a > handy subroutine to have in the toolbox). Then I'd convert to get the day > of the week, another case statement to get the number of days past > Thursday, do the math from the last DOM internal date, oconv the result, > and grab a cup of dark roast. There are probably more efficient ways, but > that's how I'd work it through my head in an interview. > > This is pretty much the same problem as "current week of the year" :-) > > Can't remember off the top of my head, but it's *extremely* easy to make > an "off by one" error - I remember someone copying my Pickwiki code and > getting it wrong, introducing the very error I'd fixed. > > Cheers, > Wol > _______________________________________________ > U2-Users mailing list > U2-Users@listserver.u2ug.org > http://listserver.u2ug.org/mailman/listinfo/u2-users > _______________________________________________ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users
