How users start programming in Emacs Lisp...

[Christopher Dimech]

I would like to be able to decide the name from the mini-buffer.
How can that be done?


----- Christopher Dimech

Society has became too quick to pass judgement and declare someone Persona 
Non-Grata, 
the most extreme form of censure a country can bestow. 

In a new era of destructive authoritarianism, I support Richard Stallman.  
Times of great 
crisis are also times of great opportunity. I call upon you to make this 
struggle yours as well !

https://stallmansupport.org/     https://www.fsf.org/     https://www.gnu.org/


> Sent: Monday, May 31, 2021 at 7:48 AM
> From: "Jean Louis" <bugs@gnu.support>
> To: "Christopher Dimech" <dimech@gmx.com>
> Cc: help-gnu-emacs@gnu.org
> Subject: Re: How users start programming in Emacs Lisp...
>
> * Christopher Dimech <dimech@gmx.com> [2021-05-30 20:22]:
> > I am having some problem figuring out what the following does, having 
> > format 
> > repeated twice.
> > 
> > (format format ": " name)
> 
> It could be all simpler, it just adds the sub-name to the main name.
> 
> M-x rcd-temp-buffer would create *RCD TEMPORARY BUFFER: 1*
> 
> but (rcd-temp-buffer "Lisp") would create *RCD TEMPORARY BUFFER: Lisp*
> 
> Myself I don't know why I made it so complex, but it just works and I
> use temporary or scratch buffers that way often.
> 
> Simpler way to open temporary buffer is just:
> 
> C-x b NAME-OF-YOUR-BUFFER
> 
> but when function is tied to key binding it becomes simple, press F5
> or other key how you bind it, and you are already in clean empty new
> temporary buffer. Or invoke C-u prefix to be asked for the mode.
> 
> As Eduardo mentioned maybe it is good to keep those notes, but because
> in my mind there is distinction on what is temporary and what is not,
> for me it is fine that way as I use the database and it is trivial to
> make a function to just open quickly buffer, write anything and have
> it saved for future.
> 
> So I made this one...
> 
> (defun hyperscope-quick-emacs-lisp ()
>   (interactive)
>   (let* ((id (hlink-add-generic (concat "Emacs Lisp: " 
> (rcd-timestamp-literate)) "" 50 33))
>        (template (rcd-db-get-entry "hlinktypes" "hlinktypes_template" 50 
> hs-db)))
>     (when template
>       (rcd-db-update-entry "hyobjects" "hyobjects_text" id template hs-db))
>     (hyperscope-edit-with-mode id "hyobjects_text")))
> 
> The "name" of the note should be something quick:
> 
> (concat "Emacs Lisp: " (rcd-timestamp-literate)) ⇒ "Emacs Lisp: Sunday, May 
> 30 2021, 22:21:26"
> 
> Function `hlink-add-generic' just adds generic object with type 50
> (Emacs Lisp in description, text and report of the object) with the
> parent node 33 which is "Emacs Lisp" set or category.
> 
> A type can have a template, why not, it is inserted as value of the
> column "hyobjects_text", and finally edited in the last line.
> 
> Automatic saving is not a big deal, and automatic revision system
> also.
> 
> What really matters is integration that brings speed to user without
> thinking, and so the workflow is:
> 
> 1. Press F5, edit Emacs Lisp (forget about anything else)
> 
> When editing database stuff, then things like byte compiling will not
> work as it is not tied to buffer, but is not impossible to byte
> compile and keep what is compiled in the database. I did not manage to
> make it.
> 
> I am aware that little of this makes sense to people who edit mostly
> files. Some functionality can be for files:
> 
> ;;;; ↝ RCD TEMPORARY BUFFERS
> 
> (defvar rcd-temp-buffer-mode-history nil)
> (defvar rcd-temp-file-directory "~/tmp/")
> (defvar rcd-temp-buffer-name "RCD TEMPORARY BUFFER")
> (defvar rcd-temp-buffer-modes '(("adoc-mode" . "adoc")
>                               ("emacs-lisp-mode" . "el")
>                               ("lisp-mode" . ".lisp")
>                               ("markdown-mode" . ".md")
>                               ("org-mode" . "org")
>                               ("sql-mode" . "sql")
>                               ("fundamental-mode" . "txt")
>                               ("html-mode" . "html")))
> 
> (defun rcd-temp-buffer (&optional name mode)
>   (interactive "p")
>   (let* ((format (concat "*" rcd-temp-buffer-name "%s%s*"))
>        (buffer (if name (format format ": " name) (format format "" ""))))
>     (switch-to-buffer (generate-new-buffer buffer))
>     (if current-prefix-arg
>       (let* ((mode (completing-read
>                     "Mode: "
>                     (map-keys rcd-temp-buffer-modes) nil t nil
>                     'rcd-temp-buffer-mode-history)))
>         (funcall (intern mode)))
>       (funcall (intern (or mode "fundamental-mode"))))))
> 
> (defun rcd-temp-file (&optional name mode)
>   "Quickly open temporary file.
> Using C-u as prefix will ask you for the mode of the file and
> will influence the extension.
> 
> NAME may be provided programmatically.
> MODE may be provided as string programmatically."
>   (interactive)
>   (let* ((mode (or mode
>                  (if current-prefix-arg
>                      (let* ((mode (completing-read
>                                    "Mode: "
>                                    (map-keys rcd-temp-buffer-modes) nil t nil
>                                    'rcd-temp-buffer-mode-history)))
>                        mode)
>                    "fundamental-mode")))
>        (file (concat rcd-temp-file-directory
>                      (or name (format-time-string "%A-%B-%e-%Y-%T."))
>                      (cdr (assoc-string mode rcd-temp-buffer-modes)))))
>     (find-file file)
>     (save-buffer)
>     (auto-save-mode 1)
>     (funcall (intern mode))))
> 
> (defun rcd-temp-buffer-destroy-em ()
>   (interactive)
>   (kill-matching-buffers "RCD TEMPORARY BUFFER"))
> 
> 
> Then calling `rcd-temp-file' with C-u prefix will create and save the
> file with chosen mode, it will automatically generate name based on
> the time stamp and it will be in the chosen mode, like:
> 
> /home/data1/protected/tmp/Sunday-May-30-2021-22:44:11.sql
> 
> Defining a key globally:
> 
> (global-set-key [f5] 'rcd-temp-file)
> 
> That could be one way to just press a key like F5 and to create a
> note with the timestamp on a file system without thinking of its
> file name, opening of file, saving, etc.
> 
> 
> -- 
> Jean
> 
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> 
> Sign an open letter in support of Richard M. Stallman
> https://stallmansupport.org/
>