[Haskell-cafe] ANNOUNCE: time-lens-0.1

Roman Cheplyaka roma at ro-che.info
Sat May 19 17:01:36 CEST 2012

I'm happy to announce the first, experimental version of the
time-lens library.


Its goal is to simplify working with time and date data structures in
Haskell by providing lens-based overloaded accessors for Data.Time

E.g. to find the current hour you currently need to write something like

  todHour . localTimeOfDay . zonedTimeToLocalTime <$> getZonedTime

With time-lens it becomes

  getL hours <$> getZonedTime

The difference is even more impressive when you need to *update* the hour
in a ZonedTime structure, but admittedly such a need is relatively rare.

The library is pure Haskell 2010 code. It is also completely
type-compatible with Data.Time, so it's very easy to start using it in
existing projects.

Roman I. Cheplyaka :: http://ro-che.info/

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