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From: "WJ" <w_a_x_man@yahoo.com>
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Subject: Re: basic help evaluating function in an alist
Date: 2 Dec 2012 01:06:07 GMT
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WJ wrote:

> Matt Price wrote:
> 
> > Hi,
> > 
> > i'm trying to figure out what's wrong with this simple code:
> > 
> > (add-to-list 'my-winlist
> >              '(guide . (selected-window) )
> >              )
> > (windmove-right)
> > (select-window(cdr(assoc 'guide my-winlist)) )
> > 
> > So, what I would hope happens here is that I add an element (guide .
> > (selected-window))  to an alist, but that the second element would be
> > the actual window object in question, not the text string
> > "(selected-window)".  Lisp puzzles me pretty thoroughly so I know I'm
> > missing a very basic feature, but I can't figure it out by flipping
> > through the info pages...  Thanks everyone!
> > Matt
> 
> : (setq mylist '((b . 2)))
> ((b . 2))
> : (add-to-list 'mylist (cons 'c (sqrt 3)))
> ((c . 1.7320508075688772) (b . 2))

Another way:

: (require 'cl)
cl
: (setq mylist '((b . 2)))
((b . 2))
: (setq mylist (acons 'c (sqrt 3) mylist))
((c . 1.7320508075688772) (b . 2))