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Re: member returns list
From: |
Michael Heerdegen |
Subject: |
Re: member returns list |
Date: |
Wed, 02 Sep 2015 18:45:14 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux) |
Emanuel Berg <embe8573@student.uu.se> writes:
> Or is it something else?
The `car' of the result of `member' is the actual element you were
searching. Since `member' tests with `equal', that can be a different
object. So it can be useful to have access to it.
But `member' returns a whole sublist. This gives you also a simple mean
to modify a list, like in this example:
(let ((list '(1 2 3 4 5)))
(let ((list1 (member 3 list)))
(when list1 (setcar list1 -3))
list))
==> (1 2 -3 4 5)
Michael.
- RE: To `boundp' or not to `boundp'?, (continued)
- RE: To `boundp' or not to `boundp'?, Drew Adams, 2015/09/01
- member returns list (was: Re: To `boundp' or not to `boundp'?), Emanuel Berg, 2015/09/01
- RE: member returns list (was: Re: To `boundp' or not to `boundp'?), Drew Adams, 2015/09/01
- Re: member returns list (was: Re: To `boundp' or not to `boundp'?), Emanuel Berg, 2015/09/01
- RE: member returns list (was: Re: To `boundp' or not to `boundp'?), Drew Adams, 2015/09/01
- Re: member returns list (was: Re: To `boundp' or not to `boundp'?), Emanuel Berg, 2015/09/01
- RE: member returns list (was: Re: To `boundp' or not to `boundp'?), Drew Adams, 2015/09/02
- Re: member returns list (was: Re: To `boundp' or not to `boundp'?), Emanuel Berg, 2015/09/02
- Message not available
- Re: member returns list, Pascal J. Bourguignon, 2015/09/03
- Re: member returns list, Emanuel Berg, 2015/09/03
- Re: member returns list,
Michael Heerdegen <=
- Re: member returns list, Emanuel Berg, 2015/09/02
- Re: member returns list, Michael Heerdegen, 2015/09/02
- RE: member returns list, Drew Adams, 2015/09/02
- Re: member returns list, Marcin Borkowski, 2015/09/02
- Re: member returns list, Emanuel Berg, 2015/09/03
- Re: member returns list, Marcin Borkowski, 2015/09/04
- Re: member returns list, Emanuel Berg, 2015/09/05
- Re: member returns list, Random832, 2015/09/05
- Re: member returns list, Emanuel Berg, 2015/09/05
- Re: member returns list, Random832, 2015/09/05