Re: [Haskell-beginners] another type problem

Before cons'ing the result of init', you should check whether it's Just or Nothing. What you're doing now is something along the line with 5 : Just 3 -- this won't typecheck. On Tue, May 12, 2015 at 5:22 PM Roelof Wobben wrote:

Brandon Allbery schreef op 12-5-2015 om 16:16:

On Tue, May 12, 2015 at 10:11 AM, Roelof Wobben 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 associates allbery.b@gmail.com ballbery@sinenomine.net unix, openafs, kerberos, infrastructure, xmonad http://sinenomine.net

_______________________________________________ Beginners mailing listBeginners@haskell.orghttp://mail.haskell.org/cgi-bin/mailman/listinfo/beginners

What is then the right way to do. I still do not understand what you are trying to make clear to me.

Roelof

------------------------------ [image: Avast logo] http://www.avast.com/

Dit e-mailbericht is gecontroleerd op virussen met Avast antivirussoftware. www.avast.com

_______________________________________________ Beginners mailing list Beginners@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/beginners