RE: can s-exprs represent a graph without eval?

[Guy Steele - Sun Microsystems Labs <address@hidden>]

   From: "Christopher Dutchyn" <cdutchyn@cs.ubc.ca>
   To: <[mailto:owner-ll1-discuss@ai.mit.edu]>
   Cc: "Guy Steele - Sun Microsystems Labs" <Guy.Steele@sun.com>
   Subject: RE: can s-exprs represent a graph without eval?
   Date: Thu, 19 Jun 2003 13:36:14 -0700
   
   Guy Steele wrote:
   
   >> Consider this bit of code:
   >>  (mapcar #'+ x '#1=(1 -1))
   >> If x is (1 4 7 10), the result will be (2 3 8 9).
   
   Um, that can't be right - you never refer to #1#.  I think you meant:
   
   (mapcar #'+ '(1 4 7 10) '#1=(1 -1 . #1#))
   
Indeed!  Thanks for correcting my braino.

--Guy Steele