[Haskell-cafe] records proposals list

Wolfgang Jeltsch wolfgang at jeltsch.net
Tue Nov 22 04:54:56 EST 2005

Am Montag, 21. November 2005 20:34 schrieb Max Eronin:
> On 11/21/05, David Roundy <droundy at abridgegame.org> wrote:
> > class Coord a where
> >   get_x :: a -> Double
> >   get_y :: a -> Double
> >   set_x :: Double -> a -> a
> >   set_y :: Double -> a -> a
> I'd say this is a typical OO solution to the problem that doesn't exist
> Why do you need setters and getters for coordinate in purely
> functional language? Doesn't  data Coord = Coord Double Double,
> functional composition and monads solve problems in way better than
> inheritance?
> The most impressive feature of haskell for me, as a former "OO-design
> patterns-UML is great" programmer was that I don't have to and in fact
> must not use OO and inheritance and can write code that doesn't leave
> you guessing what exactly it is doing and what is not. And that the
> language forces you make good design decisions and doesn't let you
> make wrong ones. Inheritance  is no doubt one of the most sensless
> solutions for code reuse i have ever seen.

Yes, yes, yes! :-)

Best wishes,

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