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Re: alist-get in Emacs 24?


From: Michael Heerdegen
Subject: Re: alist-get in Emacs 24?
Date: Thu, 08 Oct 2015 18:14:17 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux)

Drew Adams <drew.adams@oracle.com> writes:

> Yes, with such (destructive) functions, if you have a variable
> pointing to the list (empty or not), you do need to re-set it
> to the result returned by the function.  But that's all, AFAIK.

Our views just differ in whether you think of a `setter' as already
including the above (undoubtedly necessary) "res-set" operation or not.
I understood "setter" as the term is used for (generalized) variables
like in gv.el.

What I meant is that just passing by value is not sufficient, you have
to set a symbol's value somewhere.  With regard to that, no, this is not
different from `delete'.


Michael.




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