... 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
[mich...@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>
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