[Haskell-beginners] foldr for Nats

[kane96 at gmx.de]

yeahh, I know that it is similar, but don't know how to start implementing it.


-------- Original-Nachricht --------
> Datum: Tue, 26 Jan 2010 11:05:20 +0000
> Von: Stephen Tetley <stephen.tetley at gmail.com>
> An: 
> CC: Beginners at haskell.org
> Betreff: Re: [Haskell-beginners] foldr for Nats

> Hi
> 
> One hint is that your data type for natural numbers is remarkably like
> the data type for lists...
> 
> data List a = [] | a : List a
> 
> The difference is that List has an element of type 'a' at the non-zero
> cases.
> 
> Best wishes
> 
> Stephen
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