From: Ted Zlatanov <tzz@lifelogs.com>
To: help-gnu-emacs@gnu.org
Subject: Re: print hash table to disk and reread in hash table
Date: Thu, 28 Aug 2008 09:03:53 -0500 [thread overview]
Message-ID: <86od3dfd86.fsf@lifelogs.com> (raw)
In-Reply-To: bbbc0efc-affc-42dd-bfc0-ebe217ad7073@z6g2000pre.googlegroups.com
On Wed, 27 Aug 2008 22:27:47 -0700 (PDT) Xah <xahlee@gmail.com> wrote:
X> but is there a function or lib to save hashtable to disk? i.e.
X> sometimes called serializing?
No. It's easy to convert a hashtable to a list, and Emacs makes it easy
to serialize a list, so that's what people do. I have code in
gnus-registry.el (copied in part from the way Gnus saves its newsrc
file) to do this. The combination of two easy things is not,
unfortunately, simple anymore.
I like the (puthash ...) approach suggested by Thierry Volpiatto but
it's a lot of function calls for a large hashtable (which the Gnus
registry creates). So I'm not sure it's the right approach either.
BBDB has a similar problem; it saves vectors instead of lists.
If there's no library for serialization, it should definitely be
written. Emacs Lisp has only a few basic data types, and not all of
them have to be supported anyhow.
Ted
next prev parent reply other threads:[~2008-08-28 14:03 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-28 1:01 print hash table to disk and reread in hash table Xah
2008-08-28 5:21 ` Thierry Volpiatto
[not found] ` <mailman.17732.1219901096.18990.help-gnu-emacs@gnu.org>
2008-08-28 5:27 ` Xah
2008-08-28 6:17 ` Thierry Volpiatto
2008-08-28 14:03 ` Ted Zlatanov [this message]
2008-08-28 18:10 ` Eli Zaretskii
[not found] ` <mailman.17796.1219947087.18990.help-gnu-emacs@gnu.org>
2008-08-29 14:06 ` Ted Zlatanov
2008-08-29 14:52 ` Eli Zaretskii
[not found] ` <mailman.17897.1220021571.18990.help-gnu-emacs@gnu.org>
2008-08-29 18:10 ` Ted Zlatanov
2008-08-28 8:36 ` Niels Giesen
2008-10-10 20:38 ` harven
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