Re: Is "static" meaningful in Objective-C methods?

[Miles Parker]

I'd agree with Russ, though not being privy to the design details, its
possible that this would be overkill.

Miles T. Parker
Software Engineer
The Brookings Institution  1775 Mass. Ave. NW  Washington, DC  20036
http://www.brook.edu/es/dynamics/models/ascape
mailto:address@hidden  voice 202.797.6136  fax 202.797.6319

> From: Russell Standish <address@hidden>
> Reply-To: address@hidden
> Date: Thu, 2 Nov 2000 12:46:40 +1100 (EST)
> To: address@hidden
> Subject: Re: Is "static" meaningful in Objective-C methods?
> 
> Let me butt in: It seems that the solution to Paul's problem to define
> a sim. anneal class, and to store the relevant instance variables
> there. Then messages pass to the enclosing class can be forwarded onto
> the sim. anneal class.
> 
> Paul E Johnson wrote:
>> 
>> "Marcus G. Daniels" wrote:
>>> 
>>>>>>>> "PJ" == Paul E Johnson <address@hidden> writes:
>>> PJ> Using this in Swarm would let me get rid of a bunch of IVARS that hold
>>> PJ> values of seldom-used methods, so I could clean up some code.
>>> 
>>> It seems fishy that an instance variable would ever be changed to static
>>> state, since one is local to an object and the other modifies the
>>> behavior of any object that calls the method.
>> 
>> OK, I don't want instances to share the static variable, so I won't do
>> it. 
>> 
>> So you don't think I'm totally insane, here is why I wanted do do this.
>> I was looking at using simulated annealing to optimize something (the
>> Gnu Scientific Library code makes it quite clear how this can be done,
>> incidentally).  In the method to do the simulated annealing, it uses
>> some variables that are adjusted each time the method is called.  For
>> example, the T variable ("Temperature")  shrinks T just a bit, say
>> T=T/1.1.  T is used in no other methods, so it is not needed as an IVAR,
>> except that each time the method is called, of course, it has to know
>> its previous value.
>> 
>> I'm reading a C book that recommends using static locals in place of
>> global variables where possible. Too bad Obj-C methods don't allow it.
>> 
>> -- 
>> Paul E. Johnson                       email: address@hidden
>> Dept. of Political Science            http://lark.cc.ukans.edu/~pauljohn
>> University of Kansas                  Office: (785) 864-9086
>> Lawrence, Kansas 66045                FAX: (785) 864-5700
>> 
>> ==================================
>> Swarm-Support is for discussion of the technical details of the day
>> to day usage of Swarm.  For list administration needs (esp.
>> [un]subscribing), please send a message to <address@hidden>
>> with "help" in the body of the message.
>> 
> 
> 
> 
> ----------------------------------------------------------------------------
> Dr. Russell Standish              Director
> High Performance Computing Support Unit, Phone 9385 6967
> UNSW SYDNEY 2052                       Fax   9385 6965
> Australia                address@hidden
> Room 2075, Red Centre             http://parallel.hpc.unsw.edu.au/rks
> ----------------------------------------------------------------------------
> 
> ==================================
> Swarm-Support is for discussion of the technical details of the day
> to day usage of Swarm.  For list administration needs (esp.
> [un]subscribing), please send a message to <address@hidden>
> with "help" in the body of the message.
> 


                  ==================================
   Swarm-Support is for discussion of the technical details of the day
   to day usage of Swarm.  For list administration needs (esp.
   [un]subscribing), please send a message to <address@hidden>
   with "help" in the body of the message.