[Haskell-beginners] string instead of char

John Moore john.moore54 at gmail.com
Sun Oct 4 12:05:33 EDT 2009

    I am now writing a function that replaces vowels with the letter x.
eg.put in a string "help" and out comes hxlp.
I tried this:

f x = case x of

      {'a' -> 'x';'e' -> 'x';'i' -> 'x';'o' -> 'x';'u' -> 'x';_ -> x}

but this wont work on strings, only on the individual letters. Any direction
would be very welcome.


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