On Tue, Nov 8, 2016 at 6:26 PM, Jon Zeppieri <zeppi...@gmail.com> wrote:
> > > On Tue, Nov 8, 2016 at 6:18 PM, George Neuner <gneun...@comcast.net> > wrote: > >> >> On 11/8/2016 2:29 PM, Robby Findler wrote: >> >>> find-seconds returns a number, not a date? Maybe seconds->date is the >>> culprit here? >>> >>> Robby >>> >> >> Spoke too soon. 1 combination gets it right: (seconds->date >> (find-seconds ... #F) #T). >> >> Note that (for me) Nov 6 should be DST [until 2AM], but Nov 7 should be >> EST. >> >> ------------------------------ >> (require racket/date) >> >> (seconds->date (find-seconds 0 0 0 6 11 2016 #f) #f) >> (seconds->date (find-seconds 0 0 0 6 11 2016 #f) #t) >> (seconds->date (find-seconds 0 0 0 6 11 2016 #t) #f) >> (seconds->date (find-seconds 0 0 0 6 11 2016 #t) #t) >> (displayln "") >> (seconds->date (find-seconds 0 0 0 7 11 2016 #f) #f) >> (seconds->date (find-seconds 0 0 0 7 11 2016 #f) #t) >> (seconds->date (find-seconds 0 0 0 7 11 2016 #t) #f) >> (seconds->date (find-seconds 0 0 0 7 11 2016 #t) #t) >> >> => >> date* 0 0 0 6 11 2016 0 310 #f 0 0 "UTC") >> (date* 0 0 20 5 11 2016 6 309 #t -14400 0 "Eastern Daylight Time") >> (date* 0 0 4 6 11 2016 0 310 #f 0 0 "UTC") >> (date* 0 0 0 6 11 2016 0 310 #t -14400 0 "Eastern Daylight Time") >> >> (date* 0 0 0 7 11 2016 1 311 #f 0 0 "UTC") >> (date* 0 0 19 6 11 2016 0 310 #f -18000 0 "Eastern Standard Time") >> (date* 0 0 5 7 11 2016 1 311 #f 0 0 "UTC") >> (date* 0 0 0 7 11 2016 1 311 #t -14400 0 "Eastern Daylight Time") >> ------------------------------ >> >> > > George, these are not correct results. The UTC offset is correct, but the > time fields are not -- under the assumption that you're trying to > round-trip them unchanged. (But maybe that's not a correct assumption.) At > any rate, I think your original example demonstrates a problem with > seconds->date on Windows. > > > Sorry, that was confusing. What I meant to say was: the results are correct (given the treatment of the original date fields as UTC and the treatment of the resulting seconds as local), but based on your original post, I don't think they're the results you were after. But I'm not certain of that. - Jon -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
