CoCalc -- folds.hs

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cocalc-examples / martinthoma-latex-examples / documents / Programmierparadigmen / scripts / haskell / folds.hs

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summer :: [Int] -> Int
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summer = foldr (-) 0
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summel :: [Int] -> Int
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summel = foldl (-) 0
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main :: IO ()
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main = do
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	print (summer [1,2,3])
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	-- 0-(1-(2-3)) = 0-(1-(-1)) = 2
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	print (summel [1,2,3])
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	-- ((0-1)-2)-3 = -6
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