Re: [Haskell-cafe] MonadList?

Michael Shulman wrote:

class MonadList m where option :: [a] -> m a

[...] There's no need for an extra class, it can be done with MonadPlus: option :: MonadPlus m => [a] -> m a option = msum . map return This definition came up before, for example here: http://www.haskell.org/haskellwiki/Sudoku enjoy, Bertram