[Haskell-cafe] eager/strict eval katas

Benja Fallenstein benja.fallenstein at gmail.com
Wed Dec 12 15:50:23 EST 2007

Hi Thomas,

On Dec 12, 2007 5:31 PM, Thomas Hartman <thomas.hartman at db.com> wrote:
>   (solution involves building an accum list of (average,listLength) tuples.
> again you can't do a naive fold due to stack overflow, but in this case even
> strict foldl' from data.list isn't "strict enough", I had to define my own
> custom fold to be strict on the tuples.)

Might it be worthwhile considering the use of a custom strict pair
type instead of rewriting the strict fold functions? I.e., define

data Pair a b = Pair !a !b

and then use ordinary foldl' and foldr' on that.

- Benja

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