[Haskell-cafe] Wikipedia on first-class object

[Cristian Baboi]

Thinking about files and types, I recalled that in Pascal files must have  
types.


On Thu, 27 Dec 2007 12:40:22 +0200, Yitzchak Gale <gale at sefer.org> wrote:

>> I'm not sure that in Haskell one can say that storing a value of some  
>> type
>> to disk is an operation defined on that type.
>
> It is. For example:
>
> hPutStr :: Handle -> String -> IO ()
>
> The result type of this function is IO (), which means an
> IO action. In this case, the semantics of the action are
> that, when performed, it writes the bytes into a file.
>


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