unofficial mirror of help-gnu-emacs@gnu.org
 help / color / mirror / Atom feed
From: Jean Louis <bugs@gnu.support>
To: help-gnu-emacs@gnu.org
Subject: How to get plist properties list?
Date: Fri, 8 Jan 2021 07:48:46 +0300	[thread overview]
Message-ID: <X/fkLpiKVINsGDSm@protected.rcdrun.com> (raw)
In-Reply-To: <7eec4142-3c37-4084-9ea1-73df5df2c821@default>

As I am replacing here `dotimes':

(setq plist '(age "47" name "Doe"))

(defun divisible-by-2-or-0-p (n)
  "Returns t if number is divisible by 2"
  (if (or (= n 0) (= (/ n 2.0) (truncate (/ n 2.0)))) t nil))

(defun plist-properties (plist)
  "Returns plist properties"
  (let* ((length (length plist))
  (properties '()))
    (dotimes (i length (reverse properties))
      (if (divisible-by-2-or-0-p i)
   (push (elt plist i) properties)))))

instead of the above complications to extreme length, I have replaced
it with this one below:

(defun plist-properties (plist)
  (let ((n 0)
 (properties '()))
    (while (/= n (length plist))
      (push (elt plist n) properties)
      (setq n (+ 2 n)))
    properties))

But maybe there is some more simpler way to get plist properties list?

Jean



  parent reply	other threads:[~2021-01-08  4:48 UTC|newest]

Thread overview: 77+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-07  7:58 How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'? Jean Louis
2021-01-07 10:03 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-07 11:00   ` Jean Louis
2021-01-07 10:07 ` Philipp Stephani
2021-01-07 10:07   ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-07 11:06     ` Jean Louis
2021-01-07 11:23       ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-07 11:12   ` Jean Louis
2021-01-07 11:33     ` Philipp Stephani
2021-01-07 11:35       ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-07 16:05         ` FW: " Drew Adams
2021-01-08  1:04           ` Jean Louis
2021-01-08  2:26             ` Stefan Monnier
2021-01-08  2:39               ` Jean Louis
2021-01-08  2:45                 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-08  2:50               ` Jean Louis
2021-01-08  3:36                 ` Stefan Monnier
2021-01-08  2:52               ` Jean Louis
2021-01-08  3:08               ` Drew Adams
2021-01-08  3:31                 ` Stefan Monnier
2021-01-08  2:19           ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-08  0:58         ` Jean Louis
2021-01-08  1:08           ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-07 15:38       ` Stefan Monnier
2021-01-08  1:03         ` Jean Louis
2021-01-08  2:21           ` Stefan Monnier
2021-01-08  2:21             ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-08  2:38             ` Jean Louis
2021-01-08  3:39               ` Stefan Monnier
2021-01-08  4:09                 ` Jean Louis
2021-01-08  5:13                   ` Stefan Monnier
2021-01-08  5:38                     ` Robert Thorpe
2021-01-08  6:22                       ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-08  7:10                       ` Stefan Monnier
2021-01-09 18:57                         ` Tomas Hlavaty
2021-01-09 19:01                           ` Stefan Monnier
2021-01-10  9:20                             ` Tomas Hlavaty
2021-01-10 14:52                               ` Stefan Monnier
2021-01-11 22:23                                 ` Tomas Hlavaty
2021-01-08  5:40                     ` Jean Louis
2021-01-08  7:14                       ` Stefan Monnier
2021-01-08  8:28                         ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-08 11:07                           ` tomas
2021-01-08 12:38                             ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-08 13:13                               ` tomas
2021-01-08 13:31                                 ` Philipp Stephani
2021-01-08 13:35                                 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-08 13:47                                   ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-08 13:15                               ` Philipp Stephani
2021-01-08 13:31                                 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-08 14:03                                   ` tomas
2021-01-09  7:55                         ` Jean Louis
2021-01-09 13:15                           ` Leo Butler
2021-01-09 14:02                             ` Philipp Stephani
2021-01-09 23:06                               ` Leo Butler
2021-01-09 23:14                                 ` Stefan Monnier
2021-01-11 12:53                                   ` Leo Butler
2021-01-11 15:03                                     ` Stefan Monnier
2021-01-08  3:03             ` Drew Adams
2021-01-08  4:40               ` Stefan Monnier
2021-01-08 17:22                 ` Drew Adams
2021-01-08  4:48               ` Jean Louis [this message]
2021-01-08  5:20                 ` How to get plist properties list? Stefan Monnier
2021-01-08  5:46                   ` Jean Louis
2021-01-08  6:50                     ` Stefan Monnier
2021-01-09  7:54                       ` Jean Louis
2021-01-09  9:27                         ` tomas
2021-01-09 10:41                           ` Jean Louis
2021-01-09 16:57                         ` Stefan Monnier
2021-01-12 20:32                           ` Jean Louis
2021-01-12 21:23                             ` Stefan Monnier
2021-01-08  0:57       ` How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'? Jean Louis
2021-01-07 15:35 ` Stefan Monnier
2021-01-08  1:02   ` Jean Louis
2021-01-08  1:12     ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-08  2:08       ` Jean Louis
2021-01-08  2:26         ` Emanuel Berg via Users list for the GNU Emacs text editor

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

  List information: https://www.gnu.org/software/emacs/

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=X/fkLpiKVINsGDSm@protected.rcdrun.com \
    --to=bugs@gnu.support \
    --cc=help-gnu-emacs@gnu.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).