[Haskell-cafe] Lists of Lists

[zell_ffhut]

Last attempt, as its due in a couple of hours

Here's what i have so far..

> charToGrid :: Char -> Position -> Grid -> Grid
> charToGrid c [] (row,col) xs = xs
> charToGrid c (row,col) xs = (changeValue c (concat xs (row*9 + col)))

Using changeValue - 

changeValue x 0 (y:ys) = (x:ys) 
changeValue x n (y:ys) = y:(changeValue x (n-1) ys)

Would really appritiate any help
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