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| | <syntaxhighlight lang="Haskell"> | | <syntaxhighlight lang="Haskell"> |
| − | import Data.Char
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| − |
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| | fact1 :: Int -> Int | | fact1 :: Int -> Int |
| | fact1 0 = 1 | | fact1 0 = 1 |
| | fact1 n = n * fact1 (n-1) | | fact1 n = n * fact1 (n-1) |
| | | | |
| − | fact2 :: Int -> Int
| + | </syntaxhighlight> |
| − | fact2 n | n==0 = 1
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| − | | otherwise = n * fact2 (n-1)
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| | | | |
| − | fact3 :: Int -> Int
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| − | fact3 n = if n==0 then 1 else n * fact3 (n-1)
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| | | | |
| − | fib :: Int -> Int
| + | <div class="mw-collapsible mw-collapsed" data-collapsetext="Hide solution" data-expandtext="Show solution"> |
| − | fib 0 = 0
| + | Some text in the div here. |
| − | fib 1 = 1
| + | <syntaxhighlight lang="Haskell"> |
| − | fib n = tmp n 0 1 where
| + | fact1 :: Int -> Int |
| − | tmp 1 _ b = b
| + | fact1 0 = 1 |
| − | tmp x a b = tmp (x-1) b (a+b)
| + | fact1 n = n * fact1 (n-1) |
| | | | |
| − | gcd' :: Int -> Int -> Int
| + | </syntaxhighlight> |
| − | gcd' a b | a > b = gcd' (a-b) b
| + | Some more text in the div. |
| − | | a < b = gcd' a (b-a)
| + | </div> |
| − | | a==b = a
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| | | | |
| − | gcd2 :: Int -> Int -> Int
| + | <div style="clear:both;"></div> |
| − | gcd2 a 0 = a
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| − | gcd2 a b = gcd2 b (a `mod` b)
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| | | | |
| − | isPrime :: Int -> Bool
| + | <div class="toccolours mw-customtoggle-myList">Show solution</div> |
| − | isPrime 1 = False
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| − | isPrime y = isPrimeTest y (ceiling (sqrt (fromIntegral y)::Double))
| |
| − | where
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| − | isPrimeTest _ 1 = True
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| − | isPrimeTest n x | n `mod` x ==0 = False
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| − | | otherwise = isPrimeTest n (x-1)
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| | | | |
| − | length' :: [a] -> Int
| + | <div class=" mw-collapsible mw-collapsed" id="mw-customcollapsible-myList"> |
| − | length' [] = 0
| + | Some text in the div here. |
| − | length' (_:xs) = 1 + length' xs
| + | <syntaxhighlight lang="Haskell"> |
| | + | fact1 :: Int -> Int |
| | + | fact1 0 = 1 |
| | + | fact1 n = n * fact1 (n-1) |
| | | | |
| − | sumIt :: [Int] -> Int
| + | </syntaxhighlight> |
| − | sumIt [] = 0
| + | Some more text in the div. |
| − | sumIt (x:xs) = x + sumIt xs
| + | </div> |
| − | | |
| − | getHead :: [a] -> a
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| − | getHead (x:_) = x
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| − | | |
| − | getLast :: [a] -> a
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| − | getLast (x:xs) | length xs == 0 = x
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| − | | otherwise = getLast xs
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| − | | |
| − | isElement :: Eq a => a -> [a] -> Bool
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| − | isElement _ [] = False
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| − | isElement a (x:xs) | a == x = True
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| − | | otherwise = isElement a xs
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| − |
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| − | getTail :: [a] -> [a]
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| − | getTail (_:xs) = xs
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| − | | |
| − | getInit :: [a] -> [a]
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| − | getInit [_] = []
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| − | getInit (x:xs) = x : getInit xs
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| − | | |
| − | combine :: [a] -> [a] -> [a]
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| − | combine [] y = y
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| − | combine (x:xs) y = x : combine xs y
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| − | | |
| − | max' :: [Int] -> Int
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| − | max' [x] = x
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| − | max' (x:y:z) | x > y = max' (x:z)
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| − | | otherwise = max' (y:z)
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| | | | |
| − | max2 :: [Int] -> Int
| + | <div style="clear:both"></div> |
| − | max2 (y:ys) = tmp y ys where
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| − | tmp a [] = a
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| − | tmp a (x:xs) | x > a = tmp x xs
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| − | |otherwise = tmp a xs
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| − | | |
| − | reverse' :: [a] -> [a]
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| − | reverse' [] = []
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| − | reverse' (x:xs) = (reverse' xs) ++ [x]
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| − | | |
| − | reverse'' :: [a] -> [a]
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| − | reverse'' n = tmp n []
| |
| − | where tmp [] ys = ys
| |
| − | tmp (x:xs) ys = tmp xs (x:ys)
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| − | | |
| − | take' :: Int -> [a] -> [a]
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| − | take' 0 _ = []
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| − | take' _ [] = []
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| − | take' n (x:xs) = x: take' (n-1) xs
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| − | | |
| − | drop' :: Int -> [a] -> [a]
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| − | drop' 0 x = x
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| − | drop' _ [] = []
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| − | drop' n (_:xs) = drop' (n-1) xs
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| − | | |
| − | minimum' :: Ord a => [a] -> a -- Is this right?
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| − | minimum' [x] = x
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| − | minimum' (x:y:z) | x < y = minimum' (x:z)
| |
| − | | otherwise = minimum' (y:z)
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| − | | |
| − | divisors :: Int -> [Int]
| |
| − | divisors n = tmp n where
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| − | tmp 0 = []
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| − | tmp x | n `mod` x == 0 = x: tmp (x-1)
| |
| − | | otherwise = tmp (x-1)
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| − | | |
| − | divisors' :: Int -> [Int]
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| − | divisors' n = filter (\x -> n `mod` x == 0) [1..n]
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| − | | |
| − | divisors'' :: Int -> [Int]
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| − | divisors'' n = [x | x<-[1..n], n `mod` x == 0]
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| − | | |
| − | zipThem:: [a] -> [b] -> [(a,b)]
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| − | zipThem (x:xs) (y:ys) = (x,y) : zipThem xs ys
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| − | zipThem _ _ = []
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| − | | |
| − | dotProduct :: [a] -> [b] -> [(a,b)]
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| − | dotProduct [] _ = []
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| − | dotProduct (x:xs) ys = tmp ys ++ dotProduct xs ys where
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| − | tmp [] = []
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| − | tmp (b:bs) = (x,b) : tmp bs
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| − | | |
| − | dotProduct' :: [a] -> [b] -> [(a,b)]
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| − | dotProduct' xs ys = [(x,y)|x<-xs, y<-ys]
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| − | | |
| − | dotProduct'' :: [a] -> [b] -> [(a,b)]
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| − | dotProduct'' x y =
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| − | zip (concat (map (replicate (length y)) x))
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| − | (concat (replicate (length x) y))
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| − | | |
| − | | |
| − | fibonacci :: Int -> Int
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| − | fibonacci n = fst (tmp n) where
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| − | fibStep (a,b) = (b,a+b)
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| − | tmp 0 = (0,1)
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| − | tmp x = fibStep (tmp (x-1))
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| − | | |
| − | allToUpper :: String -> String
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| − | allToUpper xs = [toUpper x |x<-xs]
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| − | | |
| − | allToUpper' :: String -> String
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| − | allToUpper' xs = map toUpper xs
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| − | </syntaxhighlight> | |
