[Haskell-cafe] IO (Either a Error) question

[Eugene Dzhurinsky]

On Thu, May 06, 2010 at 10:05:05AM +0200, David Virebayre wrote:
> A constructor can be seen as a function that takes some parameters and
> produces a value
> 
> for example with the type Maybe a, which has 2 constructors ; Just and Nothing :
> 
> Prelude> :t Just
> Just :: a -> Maybe a
> 
> the constructor Just is a function that takes a value of type a and
> makes a value of type Maybe a.
> 
> Prelude> :t Just
> Just :: a -> Maybe a

Ouch, that makes things clear. Thanks for the explanation!

-- 
Eugene N Dzhurinsky
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