From: Dustin Sallings <dustin@spy.net>
To: Christian Lindig <lindig@cs.uni-sb.de>
Cc: Caml Mailing List <caml-list@inria.fr>
Subject: Re: [Caml-list] Map efficiency?
Date: Tue, 4 Nov 2003 11:37:59 -0800 [thread overview]
Message-ID: <65B5AFEA-0EFE-11D8-9AA8-000393CFE6B8@spy.net> (raw)
In-Reply-To: <20031104093905.GF24152@st>
On Nov 4, 2003, at 1:39, Christian Lindig 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.
I'm not suggesting doing away with the functorial interface, just
providing an additional one that is more accessible. I mean, something
like this would be cool (excuse my abuse of syntax):
Map.create ('a -> 'a -> int)
Then my app would just do this:
Map.create compare;;
--
Dustin Sallings
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prev parent reply other threads:[~2003-11-04 19:38 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
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 [this message]
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