Re: [Swarm-Support] Selectors

[Paul Johnson]

This is a "wrapper" problem. The only valid type of variable in forEach: 
is an id or pointer. Some people cast integers as pointers to do this 
kind of thing, but floats are a no-go as far as I understand.  I think 
in the User Guide's discussion of scheduling it talks about creating 
wrapper objects to pass variables to and fro. FOr example, you could 
create a class SwarmFloat, set a value in there, and pass it through the 
way you want.

But please just consider taking the simple, direct route: iterate over 
your list.

id <Index> index = [list begin: [self getZone]];
id anObj;
for (anObj = [index next]; [index getLoc]==Member; anObj = [index next])
{
        [anObj setPayoff: pay];
}

Marcello wrote:
> Pardon me the frequency of my questions!
>
> I have a method in a class Agent:
>
> - setPayoff: (float) p {
>
> payoff=p;
>
> return self;
> }
>
> Now, in another class, I have a List of Agent called "group". I'd like
> to pass through the list and set the payoff as follows:
> float pay=10.1;
> [group forEach: M(setPayoff:): pay ];
>
> If I do that, I get
> gcc: incompatible type for argument 4 of indirect function call
>
> if I set
> [group forEach: M(setPayoff:): (id) pay ];
> id does not work either,
>
> it only works if :
> [group forEach: M(setPayoff:): (int) pay ];
>
> but then pay is always zero.
>
> Any help?
> thanks
> marcello


--
Paul E. Johnson                       email: address@hidden
Dept. of Political Science            http://lark.cc.ku.edu/~pauljohn
University of Kansas                  Office: (785) 864-9086
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