{- | Split a list by a given character and select the nth list.

> cut ' ' 2 "foo bar baz quux" -> "bar"
-}
cut :: Integer -> Char -> String -> String
cut pos = cutR [pos]

{- | Split a list by a given character and select ranges of the resultant lists.

> cutR [2..4] ' ' "foo bar baz quux foobar" -> "baz quux foobar"
> cutR [1..1000] ' ' "foo bar baz quux foobar" -> "bar baz quux foobar"
> cutR [-1000..1000] ' ' "foo bar baz quux foobar" -> "foo bar baz quux foobar"

   Note that too large and too small indices are essentially ignored.
-}
cutR :: [Integer] -> Char -> String -> String
cutR nums delim z = drop 1 $ concat [delim:x | (x, y) <- zip string [0..], elem y nums]
     where string = split delim z