Re: [Haskell-cafe] Problems interpreting

Carajillu writes:

I get "line 18:parse error (possibly incorrect indentation)"

..which is a bit misleading, as the problem is on the preceeding line of code.

if x == e then return l2

And if x /= e? What is check_elem then?¹

-- Tries to match two lists. If they match, the result consists of the sublist -- bound to the wildcard in the pattern list. (line 18)

-k ¹ If you really don't want to provide that option, you could perhaps do: check_elem x | x == e = return l2