Bidirectional links with eev (@ EmacsConf 2022)

I submitted two proposals for 5-minute talks to the EmacsConf2022.
This one corresponds to this file: eev-kla.el. Its EmacsConf page is here.
I haven't recorded the video yet, but there's a tutorial here.
My other submission is here - it corresponds to eev-rstdoc.el.
Links to my older presentations at EmacsConfs: 2021, 2020, 2019.

Title: Bidirectional links with eev
Intended duration: 5 minutes
Abstract:

Consider the two sexps below:

(code-c-d "foobar" "/tmp/foo/bar/" :anchor) (code-c-d "fb" "/tmp/foo/bar/" :anchor)

Each one of them defines several "short hyperlink" functions. After running them the three sexps below are roughly equivalent:

(find-file "/tmp/foo/bar/plic.txt") (find-foobarfile "plic.txt") (find-fbfile "plic.txt")

The "code-c-d"s above also define functions with even shorter names -- "find-foobar" and "find-fb" - that point to "anchors" in files in the directory /tmp/foo/bar/. The three sexps below are roughly equivalent -

(find-fline "/tmp/foo/bar/plic.txt" "«bletch»") (find-foobar "plic.txt" "bletch") (find-fb "plic.txt" "bletch")

Until feb/2022 the only way that I had to produce these hyperlinks to anchors quickly required a LOT of muscle memory... I had to type this,

M-1 M-h M-w M-h M-h 9*<down> M-h M-2 M-h M-y M-h M-- M-h M-w M-k

where the number of "<down>"s depended on whether I preferred find-foobar of find-fb - i.e., of on what is my preferred "code" for the "directory" /tmp/foo/bar/; either "foobar" or "fb".

In this presentation I will show a much better way to generate short hyperlinks to anchors and push these short hyperlinks to the kill ring, and how I use that to create bidirectional hyperlinks between my notes on a language $LANGUAGE and programs written in that language.

For more info see the tutorial in eev-kla.el.

To watch the video on youtube, click on the screenshot below. That links points to the copy that is on my channel; the copy at the EmacsConf channel is here.

Note that youtube always converts my videos to a format that is blurry at some points. You can download a local copy of the original video, with subtitles, with the two "wget"s below:

# See:  http://anggtwu.net/eev-videos.html
#       http://anggtwu.net/eev-videos.html#mpv-keys
# Play: (find-eev2022klavideo "0:00")
# Info: (find-1stclassvideo-links "eev2022kla")
# Subs: (find-1stclassvideolsubs  "eev2022kla")

wget -nc http://anggtwu.net/eev-videos/emacsconf2022-kla.mp4
wget -N  http://anggtwu.net/eev-videos/emacsconf2022-kla.vtt
mpv --fs --osd-level=2 emacsconf2022-kla.mp4