From: Xavier Leroy <xavier.leroy@inria.fr>
To: "Marcin 'Qrczak' Kowalczyk" <qrczak@knm.org.pl>
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] Sorting
Date: Mon, 5 Nov 2001 10:22:51 +0100 [thread overview]
Message-ID: <20011105102251.C8282@pauillac.inria.fr> (raw)
In-Reply-To: <slrn9tvbh7.904.qrczak@qrnik.zagroda>; from qrczak@knm.org.pl on Wed, Oct 31, 2001 at 07:54:16AM +0000
> What are advantages and disadvantages in parametrizing either by '<'
> or by the 3-way comparison?
In addition to what has been said already, the 3-way comparison is
less error-prone with respect to two classic errors:
1- passing a "less than or equal" predicate where a "less than"
predicate is expected, or conversely;
2- passing a predicate that is not a total ordering where a total
ordering is expected.
Both errors could cause the old Sort.array or Sort.list functions to
misbehave seriously. These errors are still possible with the 3-way
comparison approach, but less likely I think.
- Xavier Leroy
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next prev parent reply other threads:[~2001-11-05 9:23 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-10-31 7:54 Marcin 'Qrczak' Kowalczyk
2001-11-05 9:22 ` Xavier Leroy [this message]
2001-11-05 12:26 ` jeanmarc.eber
2001-10-31 13:42 Damien Doligez
2001-11-02 14:38 ` Pierre Weis
2001-11-02 15:10 Krishnaswami, Neel
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