The type of the cons operator (:) is(:) :: a -> [a] -> [a]The way you are invoking it expects it to have the type(:) :: a -> Maybe [a] -> [a] -- not validOne solution is to write such a function yourself, while the other would be to rewrite your code to invoke it correctly.On 12 May 2015 at 19:46, Brandon Allbery <allbery.b@gmail.com> wrote:_______________________________________________On Tue, May 12, 2015 at 10:11 AM, Roelof Wobben <r.wobben@home.nl> wrote:I do not understand what you are saying to me.
I know that init produces a Maybe [a] . That is why I did put a Just before it.
You are invoking it again though, and using its result as if it produces [a] instead of Maybe [a].--brandon s allbery kf8nh sine nomine associatesunix, openafs, kerberos, infrastructure, xmonad http://sinenomine.net
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--RegardsSumit Sahrawat