On Wed, Dec 7, 2011 at 23:24, Alexej Segeda <aloscha_den_st...@hotmail.com>wrote:
> case s of > (s == reverse s) -> putStrLn (s ++ " is a > palindrome") > otherwise -> putStrLn (s ++ " is not a > palindrome") > case does pattern matching, not Boolean expressions. (s == reverse s) is not a useful pattern, and in fact is probably a syntax error because == is not a valid infix constructor. If you want to do Boolean comparisons in a case, you need to use something like > case () of > () | s == reverse s -> putStrLn "palindrome" > _ -> putStrLn "nope" (otherwise isn't doing what you think there, either; it's exactly equivalent to the _ (unnamed placeholder) I used, since you aren't then using otherwise as the local binding (shadowing the Prelude one) that it is.) -- brandon s allbery allber...@gmail.com wandering unix systems administrator (available) (412) 475-9364 vm/sms
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