From: Christian Lindig <lindig@cs.uni-sb.de>
To: Dustin Sallings <dustin@spy.net>
Cc: Caml Mailing List <caml-list@inria.fr>
Subject: Re: [Caml-list] Map efficiency?
Date: Tue, 4 Nov 2003 10:39:05 +0100 [thread overview]
Message-ID: <20031104093905.GF24152@st> (raw)
In-Reply-To: <CE3F5BA3-0E9C-11D8-8A03-000393CFE6B8@spy.net>
On Mon, Nov 03, 2003 at 11:59:24PM -0800, Dustin Sallings wrote:
> Also, is there a particular reason Map is so, um, inaccessible to
> beginners? Hashtbl's generic interface is much more inviting than
> Map's functorial-only interface, especially to those not terribly
> familiar with the module system.
Map depends on keys to be ordered. This in turn requires to allow for a
user-defined order: assume sets as keys that are implemented by
unordered lists. Different lists can represent the same set. Hence, it
must be possible to provide a user-defined order that would treat those
lists as equal. The functor argument of Map contains the compare() which
does just that.
-- Christian
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next prev parent reply other threads:[~2003-11-04 9:41 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-11-04 7:59 Dustin Sallings
2003-11-04 9:11 ` Jean-Christophe Filliatre
2003-11-04 10:00 ` Richard Jones
2003-11-04 19:58 ` Issac Trotts
2003-11-04 9:39 ` Christian Lindig [this message]
2003-11-04 18:14 ` Alex Baretta
2003-11-05 1:09 ` Nicolas Cannasse
2003-11-07 8:27 ` Jean-Christophe Filliatre
2003-11-07 11:39 ` Why are functors better? (Re: [Caml-list] Map efficiency?) Yaron M. Minsky
2003-11-07 14:02 ` Michael Hicks
2003-11-07 14:08 ` Fernando Alegre
2003-11-07 14:49 ` [Caml-list] Map efficiency? Florian Hars
2003-11-04 19:37 ` Dustin Sallings
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