haskell remove from list code example

Example 1: delete a as haskell

removeItem _ []                 = []
removeItem x (y:ys) | x == y    = removeItem x ys
                    | otherwise = y : removeItem x ys

Example 2: remove nth element from list haskell

deleteN :: Int -> [a] -> [a]
deleteN _ []     = []
deleteN i (a:as)
   | i == 0    = as
   | otherwise = a : deleteN (i-1) as