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sequence difference
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| main :: IO() | |
| main = do | |
| print . f $ map sqrt [1..20] | |
| f :: Num a => [a] -> [a] | |
| f [x1,x2] = [x2-x1] | |
| f (x1:x2:xs) = x2-x1:f (x2:xs) | |
| f _ = [] |
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