Hello Alfonso,

Friday, April 6, 2007, 9:33:45 PM, you wrote:

> (I'm not that comfortable working with existentials yet :)).

probably you may benefit from looking at
http://haskell.org/haskellwiki/OOP_vs_type_classes and original
Wadler's paper mentioned there

-- 
Best regards,
 Bulat                            mailto:[EMAIL PROTECTED]

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