Well, here is your problem:
map :: (a -> b) -> [a] -> [b]
putStrLn :: String -> IO ()
qlist :: [String]
map putStrLn :: [String] -> [IO ()]
map putStrLn qlist :: [IO ()]
The type of (map putStrLn qlist) is not of the form IO a, so it's not
an action which can be run. There are some useful prelude
I have a simple list like this:
qlist = ["ll", "kkk", "d"]
Why is it OK to do this:
qwrap [] = putStrLn ":"
qwrap (a:as) = do
putStrLn a
qwrap as
qwap qlist
but not this:
map putStrLn qlist
What is going on in the map function?
McQueen
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