... There have been 12 replies to this question, all of which say the same thing. I'm glad we're so happy to help, but does Just 3 >>= return . (+1) Need to be explained by 12 different people? fmap ("trying to"++) $ Just "help" -- :D Cory
Why doesn't this work?
Michael [michael@localhost ~]$ ghci GHCi, version 6.10.1: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim ... linking ... done. Loading package integer ... linking ... done. Loading package base ... linking ... done. Prelude> Just 3 >>= (1+)
<interactive>:1:0: No instance for (Num (Maybe b)) arising from a use of `it' at <interactive>:1:0-14 Possible fix: add an instance declaration for (Num (Maybe b)) In the first argument of `print', namely `it' In a stmt of a 'do' expression: print it Prelude>