From: "Bill Schottstaedt" <bil@ccrma.Stanford.EDU>
To: bug-guile@gnu.org
Subject: Re: (< complex) and friends
Date: Fri, 19 Sep 2008 06:23:57 -0700 [thread overview]
Message-ID: <20080919132021.M10915@ccrma.Stanford.EDU> (raw)
In-Reply-To: <49dd78620809171437r739ec0cave11d0728165e6292@mail.gmail.com>
map does not accept no list:
guile> (map (lambda (a) a))
Backtrace:
In standard input:
1: 0* [map #<procedure #f (a)>]
standard input:1:1: In procedure map in expression (map (lambda # a)):
standard input:1:1: Wrong number of arguments to #<primitive-generic map>
ABORT: (wrong-number-of-args)
+ and * have a "natural" identity (0 and 1), so it is not silly that (+ a) is
(+ a 0) and (+) is (+ 0 0), but #t does not strike me as a natural identity
for < -- (< 1 1) is #f. But I hate these kinds of discussions, so I defer...
next prev parent reply other threads:[~2008-09-19 13:23 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
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 [this message]
2008-09-19 23:17 ` Neil Jerram
2008-09-19 23:59 ` Jon Wilson
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