From: skaller <skaller@users.sourceforge.net>
To: Richard Jones <rich@annexia.org>
Cc: caml-list <caml-list@inria.fr>
Subject: Re: [Caml-list] Should be INSIDE STANDARD-LIB: Hashtbl.keys
Date: 24 Apr 2004 11:58:52 +1000 [thread overview]
Message-ID: <1082771932.21205.654.camel@pelican.wigram> (raw)
In-Reply-To: <20040423150322.GA21489@redhat.com>
On Sat, 2004-04-24 at 01:03, Richard Jones wrote:
> Maybe there's no good behaviour, but I keep writing a 'keys' function
> in almost every program I've written which uses Hashtbl, which
> certainly suggests that something is missing.
The problem is that the Ocaml hashtbl isn't a conventional
hash table. It allows multiple bindings which means it
cannot be treated as a simple container.
I spend some time making sure I don't use that
feature by mistake.
Similar 'too rich' functionality exists for
many data types, for example mutable strings and arrays.
On the other hand some functionality is missing,
for example variable length arrays.
The former can be fixed easily by the client
building a wrapper library with restricted functionality.
The latter *needs* to be added to the standard
library urgently because it cannot be implemented
at all in Ocaml without magic, and it is a very
useful and important data structure to have.
--
John Skaller, mailto:skaller@users.sf.net
voice: 061-2-9660-0850,
snail: PO BOX 401 Glebe NSW 2037 Australia
Checkout the Felix programming language http://felix.sf.net
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next prev parent reply other threads:[~2004-04-24 1:59 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-04-21 1:19 Oliver Bandel
2004-04-21 8:39 ` Richard Jones
2004-04-21 9:13 ` Martin Jambon
2004-04-23 12:51 ` Xavier Leroy
2004-04-23 13:05 ` Jean-Baptiste Rouquier
2004-04-23 16:04 ` Xavier Leroy
2004-04-23 18:21 ` Jon Harrop
2004-04-23 21:31 ` Jon Harrop
2004-04-23 21:53 ` John Goerzen
2004-04-26 6:28 ` Florian Hars
2004-04-23 18:29 ` John Goerzen
[not found] ` <20040423190710.GA1506@first.in-berlin.de>
2004-04-23 20:42 ` John Goerzen
2004-04-23 15:03 ` Richard Jones
2004-04-24 1:58 ` skaller [this message]
2004-04-24 9:20 ` Nicolas Cannasse
2004-04-24 19:26 ` skaller
2004-04-26 7:29 ` Jean-Christophe Filliatre
2004-04-23 16:06 ` Brian Hurt
2004-04-23 16:31 ` Martin Jambon
2004-04-23 17:27 ` Christoph Bauer
2004-04-23 18:29 ` John Goerzen
[not found] ` <20040423191010.GB1506@first.in-berlin.de>
2004-04-23 20:41 ` John Goerzen
[not found] ` <20040424080904.GA821@first.in-berlin.de>
2004-04-24 20:59 ` John Goerzen
2004-04-25 8:12 ` Oliver Bandel
2004-04-23 18:28 ` John Goerzen
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