Carajillu <[EMAIL PROTECTED]> writes:
> compare function just compares the two lists and return true if they are
> equal, or false if they are not.
> find_match "4*h&a" "4*5&a" 'h' ----> returns '5' (5 matches with the h)
> find_match "4*n&s" "4dhnn" "k" ----> returns '' (no match at all - lists
> are different anyway)
Must they be equal the whole way, or just up to the occurrence of the
searched-for character?
find_match (x:xs) (y:ys) c | x==c = Just y
| x/=y = Nothing
| True = find_match xs ys c
find_match [] [] _ = Nothing
Or, to check the whole list:
find_match (x:xs) (y:ys) c | x==c && xs == ys = Just y
| x/=y = Nothing
| True = find_match xs ys c
find_match [] [] _ = Nothing
-k
--
If I haven't seen further, it is by standing in the footprints of giants
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