From: Erik de Castro Lopo <ocaml-erikd@mega-nerd.com>
To: caml-list@pauillac.inria.fr
Subject: Re: [Caml-list] laziness
Date: Mon, 6 Sep 2004 18:44:20 +1000 [thread overview]
Message-ID: <20040906184420.25a3b8dc.ocaml-erikd@mega-nerd.com> (raw)
In-Reply-To: <20040906005741.GA20406@annexia.org>
On Mon, 6 Sep 2004 01:57:41 +0100
Richard Jones <rich@annexia.org> wrote:
> One thing that worries me about laziness.
>
> Doesn't laziness often indicate a bug in the code? ie. You've
> written an expression in the program, but that expression is never
> used. This is dead code, right? Hence a bug?
Not necessarily, but I'm not 100 sure I can justify that.
Consider mathematical code that uses lazy evaluation. Certain
expressions might be expressed in terms of an infinite sum of
terms. It would also be possible to have two expressions
declared like this, divide one by the other and have something
which when evaluated results in a finite constant and without
even trying to evaluate the two infinite sums.
Erik
--
+-----------------------------------------------------------+
Erik de Castro Lopo nospam@mega-nerd.com (Yes it's valid)
+-----------------------------------------------------------+
"I don't think any MS Exec will ever die of old age. Satan
doesn't need the competition."
-- Digital Wokan on LinuxToday.com
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next prev parent reply other threads:[~2004-09-06 8:44 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-09-05 1:07 Jason Smith
2004-09-05 5:46 ` skaller
2004-09-06 0:57 ` Richard Jones
2004-09-06 6:11 ` Nicolas Cannasse
2004-09-06 8:24 ` skaller
2004-09-06 8:44 ` Erik de Castro Lopo [this message]
2004-09-06 12:55 ` Jon Harrop
2004-09-06 16:21 ` William Lovas
2004-09-06 22:35 ` Hartmann Schaffer
2004-09-07 8:31 ` Richard Jones
2004-09-07 8:37 ` Nicolas Cannasse
-- strict thread matches above, loose matches on Subject: below --
2004-09-06 12:17 Jason Smith
2004-09-06 17:00 ` skaller
2004-09-06 9:16 Jason Smith
2004-09-06 9:07 Jason Smith
2004-09-06 10:18 ` skaller
2004-09-04 6:30 skaller
2004-09-04 8:40 ` Marcin 'Qrczak' Kowalczyk
2004-09-04 11:21 ` skaller
2004-09-04 11:49 ` Richard Jones
2004-09-04 20:40 ` Hartmann Schaffer
2004-09-05 10:50 ` Jon Harrop
2004-09-05 14:07 ` skaller
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