What should I use (the equivalent of Windows schtasks) to schedule a task to run?
I searched "schedul" on hayoo!, but had no clue. It seems that I can use scheduleEventAt from Control.Monad.Event.Classes. But what is type "e"? It seems like an event. How do I define an event? I have not learned Monad yet. Can some one give me a simple example? Suppose I want to run an external program "pg" which in Haskell's language has the type of String -> IO (). Thanks, Hong
On Fri, Mar 26, 2010 at 11:29:42PM -0500, Hong Yang wrote:
I searched "schedul" on hayoo!, but had no clue. It seems that I can use scheduleEventAt from Control.Monad.Event.Classes. But what is type "e"? It seems like an event. How do I define an event?
I don't think that's what you want; Control.Monad.Event appears to be for doing event-driven simulations, not for scheduling actual tasks on your OS. I am not sure how to do this but presumably there would have to be a library with bindings to the OS's underlying calls.
I have not learned Monad yet. Can some one give me a simple example? Suppose I want to run an external program "pg" which in Haskell's language has the type of String -> IO ().
Can you be more specific? A "simple example of monads" is rather vague; monads are used for quite a lot of things. Have you read any particular books or tutorials? -Brent
Hi Brent,
Thanks for your reply.
I asked for an example, because I thought I needed to use
Control.Monad.Event and I did not go to Monads in my learning yet (you only
have so much time left having a full time job and a little boy:)). Since
Control.Monad.Event is not what I want, do not bother with the example.
Hong
On Tue, Mar 30, 2010 at 5:38 PM, Brent Yorgey
On Fri, Mar 26, 2010 at 11:29:42PM -0500, Hong Yang wrote:
I searched "schedul" on hayoo!, but had no clue. It seems that I can use scheduleEventAt from Control.Monad.Event.Classes. But what is type "e"? It seems like an event. How do I define an event?
I don't think that's what you want; Control.Monad.Event appears to be for doing event-driven simulations, not for scheduling actual tasks on your OS. I am not sure how to do this but presumably there would have to be a library with bindings to the OS's underlying calls.
I have not learned Monad yet. Can some one give me a simple example? Suppose I want to run an external program "pg" which in Haskell's language has the type of String -> IO ().
Can you be more specific? A "simple example of monads" is rather vague; monads are used for quite a lot of things. Have you read any particular books or tutorials?
-Brent _______________________________________________ Beginners mailing list Beginners@haskell.org http://www.haskell.org/mailman/listinfo/beginners
participants (2)
-
Brent Yorgey -
Hong Yang