Re: (apply #'and '(t t nil)) not work

On Mon, 31 Mar 2008 21:41:24 +0800, fishmacs wrote:
Apparently and is not a normal function like +, -, ...

Correct; AND is a macro.

I can write (and t t nil), but if the parameters are packaged into a list,
how can I do?

One way is to use EVERY, specifying the IDENTITY function as a predicate.

(every #'identity '(t t nil)) => nil

Another way is to use macro expansion:

(let ((list '(t t nil))) `(and ,@list)) => (and t t nil)
(eval *) => nil


--
Dave Seaman
Court affirms Judge Yohn's ruling.
<http://www.ipsnews.net/news.asp?idnews=41761>
.

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