On Tue, Nov 8, 2016 at 6:26 PM, Jon Zeppieri <[email protected]> wrote:
> > > On Tue, Nov 8, 2016 at 6:18 PM, George Neuner <[email protected]> > 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 [email protected]. For more options, visit https://groups.google.com/d/optout.
