Hello Matthew, Monday, May 29, 2006, 1:38:38 AM, you wrote:
The third and final concern is the point of this post. How does one handle state efficiently in Haskell? I've seen the various state monads and gained a superficial enough understanding to be concerned about how useful they are, for the following reason:
I would like to aggregrate a large number of state variables (possibly in the hundreds of variables) into a few data structures. These structures would not only contain basic variable types, but probably some rather large mutable arrays. So lets say I have such a structure called world and I wish to update just 1 entry. If I do w=world{entry=newentry}, the entire enormous world structure is copied to w.
use RealWorld :) IORef and StorableArray are you best friends. after all, it's not good idea to work with StorableArray otherwise than via the IO monad. i think you should create separate thread for each part of your simulation and send data between them through Channels -- Best regards, Bulat mailto:Bulat.Ziganshin@gmail.com