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Re: How to flatten a one-level-deep list?
From: |
Emanuel Berg |
Subject: |
Re: How to flatten a one-level-deep list? |
Date: |
Wed, 18 May 2016 23:07:53 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.4 (gnu/linux) |
Marcin Borkowski <mbork@mbork.pl> writes:
>> (setq l '((a b c) (d e f) (g h i))) (apply 'append l) => (a b c d e f g h
>> i)
>> No idea whether performance or edge cases match your requirements, though :)
>
> Thanks, that looks fine. Meanwhile, I went
> with a mapconcat nested within a mapconcat
> (the atoms I have are strings, and what
> I really need is concatenation of all of
> them).
C-h a flatten RET anyone?
(defun message-flatten-list (list)
"Return a new, flat list that contains all elements of LIST.
\(message-flatten-list '(1 (2 3 (4 5 (6))) 7))
=> (1 2 3 4 5 6 7)"
(cond ((consp list)
(apply 'append (mapcar 'message-flatten-list list)))
(list
(list list))))
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- so far: 33 Blogomatic articles -
- How to flatten a one-level-deep list?, Marcin Borkowski, 2016/05/18
- Re: How to flatten a one-level-deep list?, tomas, 2016/05/18
- Re: How to flatten a one-level-deep list?, Marcin Borkowski, 2016/05/18
- Re: How to flatten a one-level-deep list?,
Emanuel Berg <=
- Re: How to flatten a one-level-deep list?, Stefan Monnier, 2016/05/20
- Re: How to flatten a one-level-deep list?, Michael Heerdegen, 2016/05/20
- Re: How to flatten a one-level-deep list?, Marcin Borkowski, 2016/05/20
- Re: How to flatten a one-level-deep list?, Michael Heerdegen, 2016/05/20
- Re: How to flatten a one-level-deep list?, Marcin Borkowski, 2016/05/20
- Re: How to flatten a one-level-deep list?, Michael Heerdegen, 2016/05/20