[Haskell-cafe] laziness

[Ranjan Bagchi]

Thank you -- turns out that mapAccumL did exactly what I wanted it  
to, push state through processing a very large list.

Thanks,

Ranjan

On Dec 10, 2006, at 10:18 AM, Taral wrote:

> On 12/9/06, Ranjan Bagchi <ranjan.bagchi at frotz.com> wrote:
>> Which is great.. however, what I'd like to fold the list over a  
>> tuple:
>>  >foo x (l,payload) = ((x:l), payload)
>>  >(x,_) = foldr foo ([], Nothing) [1..]
>>  >(take 10) x
>>
>> Doesn't terminate, until the stack overflows
>
> Look at Data.List's mapAccumR function.
>
> -- 
> Taral <taralx at gmail.com>
> "You can't prove anything."
>    -- Gödel's Incompetence Theorem
>
>