21 Dec
2009
21 Dec
'09
6:54 p.m.
Am Montag 21 Dezember 2009 17:39:49 schrieb kane96@gmx.de:
Prelude> :t filter filter :: (a -> Bool) -> [a] -> [a]
So we need a predicate on the type of list elements.
getMonth month cal = filter predicate cal where predicate (d,m,y) = ??
it has to match the given month and year. But don't know how to define it.
Does (==) ring a few bells?