[Haskell-cafe] List of functions
kr.angelov at gmail.com
Wed Aug 31 05:54:36 EDT 2005
2005/8/31, Sebastian Sylvan <sebastian.sylvan at gmail.com>:
> On 8/31/05, Dinh Tien Tuan Anh <tuananhbirm at hotmail.com> wrote:
> > >Something like (untested)...
> > >
> > >xs <- zipWith ($) forkIO (map (\f -> f x y) funs)
> > >tids <- sequence xs
> > >
> > what does "zipWith ($)" do ?
> $ is function application, so zipWith ($) will "zip" a list of
> functions with a list of arguments, by applying the functions to the
> arguments pair-wise, producing a list of results.
But forkIO is function not a list of functions. The above example is
incorrect. I think it should be:
tids <- sequence [forkIO (f x y) | f <- funs]
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