5 skips xs = [map snd $ filter (\(i, _) -> (i `mod` n) == 0) $ zip [1..] xs | n <- [1 .. length xs]]
7 localMaxima :: [Integer] -> [Integer]
8 -- localMaxima xs = [p <- zip [0..length xs] xs], n <- [1 .. (length xs - 1)], fst p
11 localMaxima [_,_] = []
12 localMaxima [x,y,z] | y > x && y > z = [y]
14 localMaxima (x:y:z:xs) = localMaxima [x,y,z] ++ localMaxima (y:z:xs)
16 localMaxima' :: [Integer] -> [Integer]
17 localMaxima' xs = [b | [a,b,c] <- [drop (snd pair) (fst pair) | pair <- zip [[ p | p <- fst (splitAt n xs)] | n <- [3..length xs]] [0..]], b > a && b > c]