Re: [Haskell-cafe] Simple matrix

Jared Updike wrote:

Wouldn't you want the expression

[[1,0],[0,2]] + 10 to yield [[11,10],[10,12]]

You could handle this as a special case in (+) and (*), but this is kind of a hack. Something like:

(+) [[x]] y = map (map (x+)) y (+) x [[y]] = map (map (+y)) x (+) x y = zipWith (zipWith (+)) x y

Twan