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Re: How to use a symbol and its value to create alist?
From: |
Navy Cheng |
Subject: |
Re: How to use a symbol and its value to create alist? |
Date: |
Wed, 12 Aug 2015 09:35:48 +0800 |
User-agent: |
Mutt/1.5.23 (2014-03-12) |
On Tue, Aug 11, 2015 at 07:21:15PM -0500, Barry Margolin wrote:
> In article <mailman.8135.1439301205.904.help-gnu-emacs@gnu.org>,
> Navy Cheng <navych@126.com> wrote:
>
> > For example:
> >
> > (setq a 1)
> > (setq b 2)
> > (setq c 3)
> >
> > How can I a alist, like:
> > ((a . 1) (b . 2) (c .3))
> >
> > The value of a, b and c may change, so don't do this like
> > (setq tree ((a . 1) (b . 2) (c .3)))
> >
> > Thank you!
>
> I suspect this is what you want:
>
> (setq tree (list (cons 'a a) (cons 'b b) (cons 'c c)))
>
> or using backquote:
>
> (setq tree `((a . ,a) (b . ,b) (c . ,c)))
>
Thank you for your help, This is what I want.