The pattern "[x]" only matches singleton lists.

Pajo Patak wrote:
I want to return a list, from and list of lists (all integers), where is the erroe in the code?

nthList :: [[a]] -> Int -> [a]
nthList ([x]:xs) 1     = [x]
nthList ([x]:xs) (n+1) = nthListh xs n

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