[Haskell-cafe] how to calculate the sum of list of lists?

[Eric Olander]

If I understand you correctly, this should do it:

sums :: Num a => [[a]] -> a
sums l = sum [sum p | p <- l]

-Eric

On 2/5/07, Miranda Kajtazi <mirandakajtazi at gmail.com> wrote:
>
> Help,
>
> How to calculate the sum of list of lists in Haskell?
> Please help me,
> Miranda
>
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