2009/6/14 Gjuro Chensen
Hello everyone!
Im a Haskell newbie, and Ive have few unanswered questions. For someone more experienced (at least I think so) its a very simple task, but I just cant get a grip on it and its pretty frustrating. It wouldn't be that bad if I haven't browse thru bunch of pages and tutorials and still nothing... The problem is: take a string, and if every words starts with uppercase letter then print yes, else no. Forum Text Bold -> yes Frog image File -> no
Ive had my share of approaches to this, but I just cant make it work. Standard one seemed the most simple:
search :: String -> String search [] = []
and then use words (splits string on space) to split the string so I could get a list and go through it recursively. But how to apply words to entered string in this form?
To find the first letter I came up with: first = take 1 (head x). And compare it with elem or ASCII values to determine if its upper case.
Any help, advice or suggestion is appreciated.
Thanks in advance!
-- View this message in context: http://www.nabble.com/Haskell---string-to-list-isusses%2C-and-more-tp2402267... Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com.
_______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
As you say, there are a number of possible approaches to take here. I'd say take a look at functions "all" [1] and "isUpper" [2], those should be all you need. * "all" takes a predicate (a function) and a list of elements. It returns True if that predicate holds for all of the elements in the list, otherwise False. * "isUpper" takes a Char and returns True if that character is an uppercase letter, otherwise False. [1] http://haskell.org/ghc/docs/latest/html/libraries/base/Prelude.html [2] http://haskell.org/ghc/docs/latest/html/libraries/base/Data-Char.html -- Deniz Dogan