31 lines
757 B
Haskell
31 lines
757 B
Haskell
module Utils where
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inBoth :: (Eq a) => [a] -> [a] -> [a]
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inBoth x y = filter (\n -> n `elem` y) x
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showMonth :: Integer -> String
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showMonth 1 = "January"
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showMonth 2 = "February"
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showMonth 3 = "March"
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showMonth 4 = "April"
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showMonth 5 = "May"
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showMonth 6 = "June"
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showMonth 7 = "July"
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showMonth 8 = "August"
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showMonth 9 = "September"
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showMonth 10 = "October"
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showMonth 11 = "November"
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showMonth 12 = "December"
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rotate :: Integer -> [a] -> [a]
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rotate n xs = take lxs . drop ((fromIntegral n) `mod` lxs) . cycle $ xs
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where
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lxs = length xs
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strictApplyN :: Integer -> (a -> a) -> a -> a
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strictApplyN 0 _ x = x
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strictApplyN n f x = strictApplyN (n - 1) f $! (f x)
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changes :: Eq a => [a] -> [a] -> [a]
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changes x y = filter (\n -> not $ n `elem` y) x
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