[Haskell-cafe] take the keywords from a string

Neil Mitchell ndmitchell at gmail.com
Sat Jun 17 21:06:43 EDT 2006


On 6/18/06, Sara Kenedy <sarakenedy at gmail.com> wrote:
> Sorry, I am not clear at some point in your answer:
> 1) The function
> lex :: String -> [(String,String)]
> and
> filter :: (a -> Bool) -> [a] -> [a]
> So, I did not see how filter can use the list of tuple string of lex.

You can write a function lexList, of type String -> [String], by
repeatedly calling lex - its not too hard. Once you have this the
filter will work.



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