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Re: Restoring objects
- To: info-mcl
- Subject: Re: Restoring objects
- From: will@ils.nwu.edu (William Fitzgerald)
- Date: 20 May 92 20:48:46 GMT
- Newsgroups: comp.lang.lisp.mcl
- Organization: The Institute for the Learning Sciences
- References: <9205201857.AA06381@cambridge.apple.com>
- Sender: usenet@ils.nwu.edu (Mr. usenet)
bill@cambridge.apple.com (Bill St. Clair) writes:
>
> The only drawback with this is that no instance of cleanup-mixin
> will be gc'able. You can solve this by using weak hash tables
> (undocumented, but present in both 2.0b1 and 2.0 final).
What are "weak hash tables", how do they work, and what are they good
for?