[Haskell-beginners] How to tell haskell that 'a' is 'a' ?

[Lai Boon Hui]

Hi all,

skips :: [a] -> [[a]]
skips xs = go 1 [] where
  go :: Int -> [[a]] -> [[a]] *-- Compiles if i remove this line*
  go n acc
    | n > (length xs) = acc
    | n == 1 = xs : (go (n+1) acc)
    | n < 1 = []
    | otherwise = (everyN n xs) : (go (n+1) acc)

everyN :: Int -> [a] -> [a]
everyN n xs =
  case (drop (n-1) xs) of
    y:ys -> y : (everyN n ys)
    [] -> []

How can i tell haskell compiler that a is the sub program if the same as a
in the main program?


-- 
Best Regards,
Boon Hui
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