From: "Basil L. Contovounesios" <contovob@tcd.ie>
To: Alex Branham <alex.branham@gmail.com>
Cc: 33309@debbugs.gnu.org, Michael Albinus <michael.albinus@gmx.de>,
Stefan Monnier <monnier@IRO.UMontreal.CA>
Subject: bug#33309: Add flatten-list?
Date: Mon, 10 Dec 2018 23:26:56 +0000 [thread overview]
Message-ID: <87d0q92can.fsf@tcd.ie> (raw)
In-Reply-To: <87pnu9m0ou.fsf@gmail.com> (Alex Branham's message of "Mon, 10 Dec 2018 17:17:21 -0600")
Alex Branham <alex.branham@gmail.com> writes:
> Basil, if you want git author credit, feel free to use yourself as the
> author since you wrote the function :-)
No need, thanks. :)
> diff --git a/lisp/subr.el b/lisp/subr.el
> index d3bc007293..52ac475cc6 100644
> --- a/lisp/subr.el
> +++ b/lisp/subr.el
> @@ -5448,5 +5448,25 @@ unmsys--file-name
> (setq file (concat (substring file 1 2) ":" (substring file 2))))
> file)
>
> +(defun flatten-tree (tree)
> + "Take TREE and \"flatten\" it.
> +This always returns a list containing all the elements of TREE.
> +Dotted pairs are flattened as well, and nil elements are removed.
> +
> +\(flatten-tree \\='(1 (2 . 3) nil (4 5 (6)) 7))
> +=> (1 2 3 4 5 6 7)"
> + (let (elems)
> + (setq tree (list tree))
> + (while (let ((elem (pop tree)))
> + (cond ((consp elem)
> + (setq tree (cons (car elem) (cons (cdr elem) tree))))
> + (elem
> + (push elem elems)))
> + tree))
Is it just me, or is the indentation a bit off here?
Thanks,
--
Basil
next prev parent reply other threads:[~2018-12-10 23:26 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-07 19:46 bug#33309: Add flatten-list? Alex Branham
2018-11-07 20:36 ` Drew Adams
2018-11-07 21:19 ` Alex Branham
2018-12-10 8:44 ` Michael Albinus
2018-12-10 17:49 ` Stefan Monnier
2018-12-10 20:12 ` Alex Branham
2018-12-10 21:36 ` Stefan Monnier
2018-12-10 23:06 ` Alex Branham
2018-12-11 12:36 ` Stefan Monnier
2018-12-10 22:42 ` Basil L. Contovounesios
2018-12-10 23:17 ` Alex Branham
2018-12-10 23:26 ` Basil L. Contovounesios [this message]
2018-12-10 23:34 ` Stephen Berman
2018-12-11 8:21 ` Michael Albinus
2018-12-11 8:34 ` martin rudalics
2018-12-11 17:36 ` bug#33309: [PATCH] flatten-list Alex Branham
2018-12-11 20:11 ` Michael Albinus
2018-12-11 20:16 ` Alex Branham
2018-12-17 11:33 ` Michael Albinus
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