From mboxrd@z Thu Jan 1 00:00:00 1970 Received: (from majordomo@localhost) by pauillac.inria.fr (8.7.6/8.7.3) id WAA06335; Fri, 23 Apr 2004 22:20:16 +0200 (MET DST) X-Authentication-Warning: pauillac.inria.fr: majordomo set sender to owner-caml-list@pauillac.inria.fr using -f Received: from concorde.inria.fr (concorde.inria.fr [192.93.2.39]) by pauillac.inria.fr (8.7.6/8.7.3) with ESMTP id WAA05694 for ; Fri, 23 Apr 2004 22:20:15 +0200 (MET DST) Received: from hirsch.in-berlin.de (hirsch.in-berlin.de [192.109.42.6]) by concorde.inria.fr (8.12.10/8.12.10) with ESMTP id i3NKKEYM003330 for ; Fri, 23 Apr 2004 22:20:14 +0200 X-Envelope-From: oliver@first.in-berlin.de X-Envelope-To: Received: from hirsch.in-berlin.de (localhost [127.0.0.1]) by hirsch.in-berlin.de (8.12.11/8.12.11/Debian-3) with ESMTP id i3NKK1IU012403 for ; Fri, 23 Apr 2004 22:20:13 +0200 Received: from first.UUCP (uucp@localhost) by hirsch.in-berlin.de (8.12.11/8.12.11/Debian-3) with UUCP id i3NKF33Q012016 for inria.fr!caml-list; Fri, 23 Apr 2004 22:15:03 +0200 Received: by first.in-berlin.de via sendmail from stdin id (Debian Smail3.2.0.114) Fri, 23 Apr 2004 22:09:32 +0200 (CEST) From: oliver@first.in-berlin.de (Oliver Bandel) Date: Fri, 23 Apr 2004 22:09:32 +0200 To: caml-list@inria.fr Subject: [oliver: Re: [Caml-list] Should be INSIDE STANDARD-LIB: Hashtbl.keys] Message-ID: <20040423200932.GB271@first.in-berlin.de> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline User-Agent: Mutt/1.3.28i X-Miltered: at concorde by Joe's j-chkmail ("http://j-chkmail.ensmp.fr")! X-Loop: caml-list@inria.fr X-Spam: no; 0.00; oliver:01 in-berlin:01 oliver:01 bandel:01 caml-list:01 hashtbl:01 caml-list:01 hashtbl:01 2004:99 hashtables:01 hashtables:01 hastbl:01 behaviour:01 forwarded:97 forwarded:97 Sender: owner-caml-list@pauillac.inria.fr Precedence: bulk ----- Forwarded message from oliver ----- To: Richard Jones Subject: Re: [Caml-list] Should be INSIDE STANDARD-LIB: Hashtbl.keys On Fri, Apr 23, 2004 at 04:03:22PM +0100, 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. FULL ACK Hashtables are an ideal tool for many applications, where retrieving BY KEYs is necessary. I mean it seems like they were imvented to do this. So, why should a person write a keys-function by him/herself, if this is the MAIN work for what Hashtables are useful? If it only makes sense to collect some data, no Hashtbl would be necessary and instead a list could be used. But Hashtables are there to do jobs, where we have keys and get values. Hashtbl.keys gives a complete access to all valid Hastbl.find/Hashtbl.find_all retrievals. So, when there is a Hashtbl.keys not trying stochastical "let's look if there is something inside" must be done, but certain retrieves for data. Ciao, Oliver ----- End forwarded message ----- ------------------- To unsubscribe, mail caml-list-request@inria.fr Archives: http://caml.inria.fr Bug reports: http://caml.inria.fr/bin/caml-bugs FAQ: http://caml.inria.fr/FAQ/ Beginner's list: http://groups.yahoo.com/group/ocaml_beginners