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From: Nicolas Richard <theonewiththeevillook@yahoo.fr>
Newsgroups: gmane.emacs.help
Subject: Re: setcdr question
Date: Tue, 02 Jul 2013 11:06:58 +0200
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To: drain <aeuster@gmail.com>
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drain <aeuster@gmail.com> writes:

> (setq list '(Trevor Jason John Alex Max))
> (setcdr (nthcdr (1- 4) list) 'Christina)

As your question was already answered, I allow me to digress slightly
in suggesting that you may like setf for such operations:

(let ((list '(Trevor Jason John Alex Max)))
  (setf (nth (1- 4) list) 'Christina)
  list)
=> (Trevor Jason John Christina Max)

-- 
Nico.