[Haskell-cafe] Infinite lists in real world programs
limestrael at gmail.com
Sat Dec 18 19:48:22 CET 2010
Thanks you all for your links,
I will read this.
However, Brent, I fail to understand your implementation of Monad... I
understand the purpose, but not the algorithm.
2010/12/18 Matthew Sottile <mjsottile at mac.com>
> This may be of some interest:
> That describes a simple project that I think is similar to what you are
> looking at doing. The code is in that github repository as well, a couple
> directories up from the paper.
> On Dec 15, 2010, at 5:52 AM, Yves Parès wrote:
> > Hello Café,
> > I was wondering if using infinite lists was a viable and efficient
> solution in haskell programs (I mean not simple prototypes) :
> > I was considering using them to model agents in a hierarchical
> multi-agent application for school.
> > A list would representate the state of an agent at a step of the program.
> > Let's say we have two simple agents, one multiplying its input by 2 and
> the other dividing it by 4 :
> > agent1 = fmap (*2)
> > agent2 = fmap (/4)
> > allValues = xs where
> > ys = agent1 xs
> > xs = 100:agen2 ys
> > main = do
> > mapM_ print $ take 100 allValues
> > Of course, in a real program, an agent would rather take a list of
> multiple agents (i.e. a list of lists) in input, so that its ouput could
> depend on what several agents feed him.
> > Some could state what I'm trying to do is FRP, and I agree. But it
> remains a simple goal so I'd like to keep the program simple, and not go
> into the whole complexity of a FRP framework (and I'm working with a
> > For instance, with my solution, I cannot dynamically connect or
> disconnect agents during the runtime, but I'll will not need to do that in
> my program.
> > Besides, I'd like to try to implement this myself, not use an already
> existing framework.
> > So is it viable or would the use of multiple infinite lists kill the
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