From: Thomas S. Dye <tsd@tsdye.com>
To: Matt Price <moptop99@gmail.com>
Cc: Org Mode <emacs-orgmode@gnu.org>
Subject: Re: how the $@%& do you add a property to a plist?
Date: Sat, 18 Jul 2015 10:01:27 -1000 [thread overview]
Message-ID: <m2a8uti6aw.fsf@tsdye.com> (raw)
In-Reply-To: <CAN_Dec890zUJA7QBCd_LGMJv3DU0hN_aS_1qBKfxdMbUcjdf+A@mail.gmail.com>
Matt Price <moptop99@gmail.com> writes:
> Hi,
>
> I am continuing to work on my marking stuff; it's working really well,
> actually.
>
> I am currently importing a list of student names and emails from a csv file
> -- this is normally how I get the list of enrolled students. I have
> modified the defauly settings from our Universities CSV export so I get
> these files in the form:
>
> Student Name,Email
> Student One, em.address@utoronto.ca
> Student Two, em.address2@utoronto.ca
>
> I then parse this into a list, each element of which is itself a list
> ("Student One" "em.address@utoronto.ca"), etc.
>
> This is OK, but not very robust. I would like instead to set *properties*,
> in case the CSV file has some other ordering of fields. So I've tried this:
>
> (defun parse-plist-csv-file (file)
> (interactive
> (list (read-file-name "CSV file: ")))
> (let ((buf (find-file-noselect file))
> (result nil))
> (with-current-buffer buf
> (goto-char (point-min))
> (let ((header (split-string (buffer-substring-no-properties
> (line-beginning-position)
> (line-end-position)) ","))
> )
> (while (not (eobp))
> (let ((line (split-string (buffer-substring-no-properties
> (line-beginning-position)
> (line-end-position))))
> (count 0)
> (new-plist '()))
> (while (< count (length line))
> (setq plist-new (plist-put new-plist '(nth count header)
> (nth count line)))
> (setq count (1+ count)))
> (push new-plist result)
> (forward-line 1))))
> (reverse result))))
>
> The line that's not working here is:
>
> (setq plist-new (plist-put new-plist '(nth count header)
> (nth count line)))
>
> which just inserts nil nil into 'new-plist. Obviously I'm making some
> elementary elsip mistake, but my elisp is too weak to figure it out. Can
> you guys help? thanks,
> Matt
According to plist-put's documentation:
(setq x (plist-put x prop val))
(setq new-plist (plist-put new-plist (nth count header) (nth count line)))
^^^^^^^^^ ^
So, you don't want plist-new, I think. Also, quoting the first (nth
...) list means the function nth is interpreted as a value of the list,
rather than a function. I think you want it to return a property.
I didn't test any of this, so your mmv.
hth,
Tom
--
Thomas S. Dye
http://www.tsdye.com
prev parent reply other threads:[~2015-07-18 20:01 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-18 18:36 how the $@%& do you add a property to a plist? Matt Price
2015-07-18 20:01 ` Thomas S. Dye [this message]
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