From: Drew Adams <drew.adams@oracle.com>
To: Paul Eggert <eggert@cs.ucla.edu>,
Stefan Monnier <monnier@iro.umontreal.ca>,
Michael Heerdegen <michael_heerdegen@web.de>
Cc: Emacs Development <emacs-devel@gnu.org>
Subject: RE: Three questions about pcase for Stefan
Date: Sat, 23 Jan 2016 14:08:27 -0800 (PST) [thread overview]
Message-ID: <4f92034b-858c-4c44-a51e-983da90a778a@default> (raw)
In-Reply-To: <56A3EF3E.3020502@cs.ucla.edu>
> > Testing equality of floating point numbers is very rarely correct.
>
> Although it's rarely correct in programs written by newbies, it's
> almost always correct in floating-point programs written by experts.
Really? Care to give an expert example of what a `pcase' user
would need to do?
What users typically do for this, AFAIK, is to test that the
given floating-point number is within a certain range. Even
experts don't test equality using `equal' and such, AFAIK.
next prev parent reply other threads:[~2016-01-23 22:08 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-23 11:48 Three questions about pcase for Stefan Michael Heerdegen
2016-01-23 15:36 ` Stefan Monnier
2016-01-23 15:45 ` Michael Heerdegen
2016-01-24 4:52 ` Stefan Monnier
2016-01-23 21:23 ` Paul Eggert
2016-01-23 22:08 ` Drew Adams [this message]
2016-01-23 22:22 ` Stefan Monnier
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