Re: [Haskell-cafe] foldlWhile

To my question of

...

foldlWhile :: (a -> b -> a) -> (a -> Bool) -> a -> [b] -> a foldlWhile f p a bs = case (bs, p a) of ([], _ ) -> a (_, False) -> a (b:bs', _ ) -> foldlWhile f p (f a b) bs'

foldl does not seem to cover this.

Dylan Thurston wrote: On Nov 20, 2004

An alternative is

foldlWhile f p a bs = last $ takeWhile p $ scanl f a bs

Yes. Thank you. Inspecting Prelude, we find out that scanl expresses, mainly, the thing. ----------------- Serge Mechveliani mechvel@botik.ru