On Sat, Aug 18, 2012 at 8:27 PM, Adde Nilsson <trialc...@gmail.com> wrote:
> Hi. > How do you add to or subtract from a LocalTime? > I'm trying to subtract a second from a LocalTime value but the only API's > I can find act only on the TimeOfDay part. > > subSec :: LocalTime -> LocalTime > subSec (LocalTime d t) = LocalTime d $ timeToTimeOfDay ((timeOfDayToTime > t) - (secondsToDiffTime 1)) > > I'm obviously on the wrong track as this looks way too complex for what > it's trying to achieve. > Calling with '2012-08-18 00:00:00' gives '2012-08-18 -01:59:59' which > isn't very helpful. How do I get to '2012-08-17 23:59:59'? > The time-lens [1] package should do what you need. [1]: http://hackage.haskell.org/package/time-lens Roman
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