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

[Roman Cheplyaka]

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

  http://hackage.haskell.org/package/time-lens
  https://github.com/feuerbach/time-lens

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

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/