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dmwit/gist:fe96f4a2ac769029e57f0019d642c34c

Created July 21, 2019 21:39
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gistfile1.txt
sums :: Num a => [a] -> (a, [a])
sums [] = (0, [])
sums (x:xs) = let ~(v,vs) = sums xs; v' = v+x in v' `seq` (v',v':vs)
main :: IO ()
main = print (fst (sums [0..1000000 :: Int]))
-- OR
-- main = print (last (scanl1 (+) [0..1000000 :: Int]))
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