Re: Ugly bug in Foundation, beware!
Re: Ugly bug in Foundation, beware!
- Subject: Re: Ugly bug in Foundation, beware!
- From: Clark Cox <email@hidden>
- Date: Thu, 3 Jun 2004 09:38:25 -0400
On Jun 03, 2004, at 09:05, Ondra Cada wrote:
>
Hi all,
>
>
just bumped into this: mutable arrays do *NOT* deep copy upon receiving
I'm not sure I'd call this a bug. None of the Foundation objects
perform deep copies, and I don't think that they ever have. If the
objects did deep copies by default, one could get into some very hairy
situations at edge cases. For example:
{
id a = [[NSMutableArray alloc] init];
id b = [[NSMutableArray alloc] init];
id c = nil;
[a addObject: b];
[b addObject: a];
c = [a copy]; //If copy performs a deep copy, then this is an
infinite loop
}
--
Clark S. Cox III
email@hidden
http://homepage.mac.com/clarkcox3/
http://homepage.mac.com/clarkcox3/blog/B1196589870/index.html
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