Re: [Haskell-beginners] Are these soloutions all valid and a good use of Haskell

It's an indentation issue. Make sure that there are no spaces before the bit about 'last5 = foldr acc' etc. On Mon, Nov 10, 2014 at 12:48 PM, Roelof Wobben wrote:

Roelof Wobben schreef op 10-11-2014 20:59:

...

last5 :: [a] -> Maybe a last5 = foldr acc Nothing where acc x Nothing = Just x acc _ j = j

When I enter this in GHCI I see this error :

Illegal type signature: ‘[a] -> Maybe a last5’

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