Re: Storing values in dictionary with their address as the key
Re: Storing values in dictionary with their address as the key
- Subject: Re: Storing values in dictionary with their address as the key
- From: Dave Carrigan <email@hidden>
- Date: Mon, 28 Jul 2008 11:31:36 -0700
On Jul 28, 2008, at 11:13 AM, Carter R. Harrison wrote:
If I wanted to store an object in a dictionary and set its key as
the object's memory address - how would I go about doing this?
I'm racking my brains trying to think of a good reason to do this and
am drawing a blank. I can, however, think of myriad bad reasons.
Right now I'm doing this:
int i;
for (i = 0 ; i < 10 ; i++)
{
NSObject *myObject = [[NSObject alloc] init];
[dictionary setValue:myObject forKey:[NSString
stringWithFormat:@"%x", &myObject]];
}
The above does seem to work, but the memory address that I get
always seems to be the same.
myObject is a variable (of type pointer) that is allocated on the
stack. Its address is always going to be the same inside that tight
loop, since the stack pointer isn't changing.
--
Dave Carrigan
email@hidden
Seattle, WA, USA
Attachment:
PGP.sig
Description: This is a digitally signed message part
_______________________________________________
Cocoa-dev mailing list (email@hidden)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden