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How to use parameters in "IO(int, int)"
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一千瓦的刀狼
May 25, 2008, 3:47:35 AM5/25/08
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Hi all,
I have got such a function like "Object => o -> IO(int, int)" from
existing API, and actually I needed is the parameters of "IO(int,
int)". How can I get these 2 parameters? just use a sentence like "x
<- fst(IO(int, int))"? Is it works? Or somebody will have a good idea
to help me? Thank you very much!
I have got such a function like "Object => o -> IO(int, int)" from
existing API, and actually I needed is the parameters of "IO(int,
int)". How can I get these 2 parameters? just use a sentence like "x
<- fst(IO(int, int))"? Is it works? Or somebody will have a good idea
to help me? Thank you very much!
Dirk Thierbach
May 25, 2008, 6:04:07 AM5/25/08
to
?????? <knif...@gmail.com> wrote:
> I have got such a function like "Object => o -> IO(int, int)" from
> existing API, and actually I needed is the parameters of "IO(int,
> int)". How can I get these 2 parameters? just use a sentence like "x
> <- fst(IO(int, int))"? Is it works?
No, that doesn't work: Read up on Monads. Tutorials have just been
mentioned in a different thread.
> Or somebody will have a good idea to help me?
Try something like
> foo o = do
> (x1,x2) <- yourFunction o
> -- now do something with x1 and x2, eg add them:
> return (x1+x2)
But if you don't understand how to use the IO-Monad, you'll probably
quickly get stuck again.
- Dirk
一千瓦的刀狼
May 26, 2008, 9:14:47 AM5/26/08
to
On 5月25日, 下午6时04分, Dirk Thierbach <dthierb...@usenet.arcornews.de>
wrote:
wrote:
Thank you very much! I will read the tutorial first
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