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Talk:99 questions/1 to 10

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Revision as of 17:33, 30 July 2008 by Brian (Talk | contribs)
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1 Bad format

The format of this page is awful. I'm collecting the problem descriptions, but having to be very careful not to look at the solutions.

The function signature and description of what it is to do should be given. The solutions should be on some separate page.

2 Does the problem 1 example need correction?

The problem refers us to
last
as a
Prelude
function providing the same functionality. However,
last
has type
[a] -> a
which differs from the Lisp example's type
[a] -> [a]
. Should we revise the example or should we rephrase the reference to
last
to highlight the difference?

Chrycheng 12:02, 12 September 2007 (UTC)

I think the answer to problem 6 is kind of "cheating". I think something like this would be a nice alternate solutions: 

isPalindrome        :: Eq (a) => [a] -> Bool
isPalindrome []     = True
isPalindrome [x]    = True
isPalindrome (x:xs) = x == last xs && isPalindrome (init xs)

Michael 16:40, 17 January 2008 (UTC)

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