[Haskell] Ignoring input

Jeremy Shaw jeremy.shaw at linspireinc.com
Sun Apr 9 20:19:55 EDT 2006


Data.Char has functions for converting upper/lower case, and for
testing if a character is alpha numeric.


If you combine these with the map and filter functions you should be
able to get it worked out:


You probably want to attack it as two steps:

 (1) remove unwanted characters
 (2) convert to lower case

Jeremy Shaw.

ps. Remember that String is just an alias for [Char] in haskell.

At Sun, 9 Apr 2006 16:59:19 -0700 (PDT),
UnfitElf wrote:
> Hi everyone,
> Im new to haskell and finding it quite hard to pickup as im a C/C++
> programmer however, im sticking with it as i think its a good thing to know.
> I have a problem were i have the user input a string, i then want to
> disregard the punctuation marks and spaces and change the case of the string
> to lower case.
> I was thinking that with the case i could work out the difference of the
> capital 'A' and the small 'a' and then change them somehow? As for ignoring
> punctuation marks and spaces im clueless.
> Thanks for any help
> Daniel
> --
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