[Haskell-cafe] how to break foldl' ?

[gary ng]

Thanks. But how would I think about using scanl
instead of foldl(or foldl') when I want is the sum,
but not the progressive result. Once again show me
that I need to throw away all imperative stuff.

Oh, BTW, the reason I asked is that I was playing with
python which has a reduce function that looks like
foldl, and I tried to practice some FP style
programming and came up with this issue. There is no
scanl though, better use for loop and break.

> 
> This should work as expected:
>   takeWhile (<maxX) (scanl (+) 0 xs)
> 
> 
> 



		
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