2 Mar
2001
2 Mar
'01
7 p.m.
Thu, 1 Mar 2001 20:25:28 +0900 (KST), Laszlo Nemeth <laszlo@ropas.kaist.ac.kr> pisze:
Prelude> let f x | Just _ == x = 0 in f (Just 4) ERROR: Illegal `_' in expression
So it works with (Just 4), but it doesn't with (Just _)?
'Just _ == x' must be an exppression. '_' is a pattern but not an expression. -- __("< Marcin Kowalczyk * qrczak@knm.org.pl http://qrczak.ids.net.pl/ \__/ ^^ SYGNATURA ZASTÊPCZA QRCZAK