Re: "Reader Q&A: ?Will C++ remain indispensable???" by Herb Sutter

On Sat, 14 Sep 2013 08:17:19 -0700 (PDT)
woodbrian77@gmail.com wrote:


e:


Heh,
{- Rust implementation
fn main() {
    let nums = [0, 1, 2, 3];
    let noms = ["Tim", "Eston", "Aaron", "Ben"];

    let mut evens = nums.iter().filter(|&x| x % 2 == 0);

    for evens.advance |&num| {
        do spawn {
            let msg = fmt!("%s says hello from a lightweight thread!",
                           noms[num]);
            println(msg);
        }
    }
}
-}

import Control.Concurrent

main = do
    let noms = ["Tim", "Eston", "Aaron", "Ben"]
        evens = [x | (x,y) <- zip noms [0..], even y]
    vars <- mapM (\x -> do
                    var <- newEmptyMVar
                    forkIO $ do
                        putStrLn
                            $ x ++ " says hello from a lightweight thread!"
                        putMVar var () -- signal finished
                    return var) evens
    mapM_ takeMVar vars -- thread join(s)

Rust is not bad, but I prefer Haskell ;)

--
Sig.