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Does anybody know a GUI library which goes OK with ghc-5?
I have been looking for one, but it seems that they only can be used with old versions
of ghc or with hugs.
Thanks in advance,
J. I. García
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Cagdas Ozgenc wrote:
> books2 :: Database2 -> Person -> [Book]
>
> books2 db person = head [ snd tuple | tuple <- db, fst tuple == person ]
>
> borrowers2 :: Database2 -> Book -> [Person]
> borrowers2 db book = [ person | (person, books) <- db, book <- books ]
You can't pattern match against
Hi,
I am trying to do some exercies in my Haskell book. I couldn't get my
program to work correctly.
type Database2 = [ (Person,[ Book ]) ]
exampleBase2 :: Database2
exampleBase2 = [ ("Alice", [ "Tintin", "Astrix" ] ),
("Anna", [ "Little Woman" ] ),
("Rory", [ "Tintin" ] )
]
books2 :: Data
