Talk:Palindrome detection

From Rosetta Code
Revision as of 17:03, 5 December 2008 by rosettacode>Drea

Haskell recursive solution note

I suppose the Haskell recursive code can be written a lot better, but I don't know how. --ShinTakezou 14:08, 5 December 2008 (UTC)

Does this look better to you?
is_palindrome_r x | length x <= 1 = True
                  | head x == last x = is_palindrome_r . tail. init $ x
                  | otherwise = False
--Gaaijz 14:37, 5 December 2008 (UTC)

The Python recursive example isn't testing that the string is a palindrome. It seems to actually be a test for whether the object tested supports len() and slicing. Drea 16:56, 5 December 2008 (UTC)

It looks like the Perl example doesn't check for character equality either. --Mwn3d 16:59, 5 December 2008 (UTC)
I've fixed the Python example. I don't know any Perl though, so I'll leave that for someone else. Drea 17:03, 5 December 2008 (UTC)