Re: How to free memory?
- To: mathgroup at smc.vnet.net
- Subject: [mg59837] Re: How to free memory?
- From: "Richard J. Fateman" <fateman at eecs.berkeley.edu>
- Date: Tue, 23 Aug 2005 04:51:41 -0400 (EDT)
- Organization: UC Berkeley
- References: <de46jr$r62$1@smc.vnet.net><de6lru$cg5$1@smc.vnet.net> <de9cs2$q5l$1@smc.vnet.net> <debsf8$969$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Wonseok Shin wrote:
>
> Wow! What you are saying is very huge to me. I though that the scope
> of the variables defined in a Module is just inside the Module. But as
> you wrote, the variables defined in a Module can be referred to from
> outside (by referring e$nnn in my case), and they are effectively
> global variables! This is quite different from the concept of local
> variables in the ordinary programming languages like C and C++.
Yes.
>
> Then, is there any way to define local variables resembling those of C
> and C++, which are automatically destroyed outside some blocks like
> Module, With, or Block?
>
> Or, how can I remedy my code, which generates a lot of unwanted
> (effectively global) variables? I may do Remove or Clear the variables
> like e1, e2, h1, and so on before returning {e, de}.
>
> Since the concept of local variables which are automatically generated
> inside a block and destroyed outside the block is very useful in C and
> C++, I'm sure that there is some elegant way to achieve the same thing
> in Mathematica.
Why are you so sure? Module was a particularly inelegant way of
trying to correct the problems with Block (and so corrected only some
of them). Maybe Module should be redefined to actually use local
(stack-allocated) variables as you and most other people with previous
experience in programming assume.
RJF
>
> Thanks,
> Wonseok Shin
>