[Haskell-cafe] Re: [Haskell] Issue about use of WinHugs

Hi

I'm new to WinHugs, what's wrong with isUpper of my WinHugs?

Nothing. The book/tutorial you are going from is out of date. Before using the isUpper/isLower functions you first have to type ":load Char": Hugs> :load Char Hugs> filter isUpper "ABCDEfgh" "ABCDE" The ":load Char" loads the Char module into scope, which provides the isUpper function. The haskell@ mailing list is mainly for announcements, so I've sent this email to haskell-cafe@ - which is the right place for questions like this. Thanks Neil