From: Jon Wilson <jsw@wilsonjc.us>
To: Bill Schottstaedt <bil@ccrma.Stanford.EDU>
Cc: bug-guile@gnu.org, Neil Jerram <neiljerram@googlemail.com>
Subject: Re: (< complex) and friends
Date: Thu, 18 Sep 2008 09:59:30 -0400 [thread overview]
Message-ID: <48D25EC2.8050305@wilsonjc.us> (raw)
In-Reply-To: <20080917214328.M24754@ccrma.Stanford.EDU>
Say you want to both filter out most elements from a list and also make
sure that the remaining elements are sorted.
(apply < (filter some-predicate original-list))
If (<) didn't evaluate to #t, then you'd have to put code in there to
check the length of the value you get from filter, which makes things
uglier. Also, having (<) => #t doesn't hurt anything.
Bill Schottstaedt wrote:
> There are actually more problems in that area; for example:
>
> guile> (< 2 1 1.0+3.0i)
> #f
>
> which perhaps should be an error also. My druthers for the
> one arg case is to simply disallow it -- why does Guile support
> stuff like:
>
> guile> (<)
> #t
>
>
>
>
>
next prev parent reply other threads:[~2008-09-18 13:59 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-11 21:03 (< complex) and friends Bill Schottstaedt
2008-08-12 9:18 ` Neil Jerram
2008-09-17 21:37 ` Neil Jerram
2008-09-17 21:45 ` Bill Schottstaedt
2008-09-18 13:59 ` Jon Wilson [this message]
2008-09-18 19:02 ` Andy Wingo
2008-09-18 17:59 ` Bill Schottstaedt
2008-09-19 3:07 ` Jon Wilson
2008-09-19 23:11 ` Neil Jerram
2008-09-19 13:23 ` Bill Schottstaedt
2008-09-19 23:17 ` Neil Jerram
2008-09-19 23:59 ` Jon Wilson
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