Re: Setting the nth element of a list

[Barry Margolin]

In article 
<8a7c4d36-195d-4517-827e-7fbeca7ae03f@r34g2000vba.googlegroups.com>,
 Nordlöw <per.nordlow@gmail.com> wrote:

> This simple example changes the second element in the list x:
> 
> (setq x '(a nil c))
> (setcar (cdr x 'b)
> 
> How do I generalize this to a function that sets (changes) the nth
> element of a list (for side effects only)?
> 
> Thanks in advance,
> Nordlöw

(require 'cl-macs)
(setf (nth n x) 'b)

-- 
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
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