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neokewl

Fri Dec 29, 2006 9:51 pm


Does anyone know the explanation of this !!!

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type Person = String
type Book = String
 
are the two  types tht i have defined. when i define a type tht corresponds to a tuple of Person and Book, i get the following error:

type database = [ (Person, Book) ] 

 ' Malformed LHS to type of class declaration ' 

but when i change to :

type Database = [ (Person, Book)] , things are fine and everything seems proper...

a) Why does this happen ?
b) What is the meaning of the above error specified ?

Thanx..
NeoKewl...


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rdrake

Fri Dec 29, 2006 10:50 pm



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Well...
Prelude> :t 5
5 :: (Num t) => tHm...Prelude> :t "HI!"
"HI!" :: [Char]Hmmmmmmmm...Prelude> :t 5 ** 2
5 ** 2 :: (Floating t) => tSeems to me like every datatype in Haskell begins with a capital letter.  Maybe that could be why? ;-)

The error, of course, tells us that.


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neokewl

Sat Dec 30, 2006 1:59 am



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Hey ..

possibly could mean that ....  dint think of tht ...thnx buddy...