Created
April 19, 2017 17:00
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Haskell lazy async
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import Control.Concurrent.Async | |
import Control.Monad | |
sites = ["http://www.google.com", | |
"http://www.bing.com", | |
"http://www.yahoo.com", | |
"http://www.wikipedia.com/wiki/Spade", | |
"http://www.wikipedia.com/wiki/Shovel"] | |
printRepeat :: String -> IO [String] | |
printRepeat url = do | |
return $ repeat url | |
main = do | |
as <- mapM (async . printRepeat) sites | |
xs <- mapM wait as | |
forM_ xs $ putStrLn . ("Got: " ++) . head |
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