[Haskell-beginners] first number is a list

Mats Rauhala mats.rauhala at gmail.com
Mon Jun 27 13:50:14 CEST 2011

I'm sorry, I'm not entirely sure what you're trying to do. Are you
trying to find the first number _in_ a list? That could be done with for
example pattern matching:

 head (x:_) = x
 head _ = error "Empty list"

The guards in list comprehension requires booleans, you gave it a
function that takes a list and returns an item of the same time.

 last :: [a] -> a

Mats Rauhala
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