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bug#25929: 25.2; map-delete doesn't delete permanently 1st alist elt


From: Drew Adams
Subject: bug#25929: 25.2; map-delete doesn't delete permanently 1st alist elt
Date: Thu, 28 Apr 2022 16:00:23 +0000

> It is a natural consequence of list structure that 
> deleting the first element doesn't do it destructively,
> so you need to do (setq foo (delq elt foo))
> 
> This is a general principal of deletion in Lisp, so
> let's teach it to people rather than trying to help
> people avoid the need to learn it.

+1.

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