11 Aug
2006
11 Aug
'06
9:34 a.m.
On Fri, Aug 11, 2006 at 03:24:18PM +0200, Henning Thielemann wrote:
On Fri, 11 Aug 2006, Ross Paterson wrote:
-- | /O(n)/. Map values and separate the 'Left' and 'Right' results. mapEither :: Ord k => (a -> Either b c) -> Map k a -> (Map k b, Map k c)
Looks more like 'partition' than 'map'.
It's a bit of both, in the same way as mapMaybe (from Data.Maybe) combines map and filter.