*** Organisation #5: Emacs refresher
**** Lecture content
***** Objective: get confident with emacs commands
***** Find out and document how to do the following steps

Resources:

C-h b
A searchable list of commands and shortcuts, very helpful

https://www.gnu.org/software/emacs/manual/html_node/emacs/
https://www.emacswiki.org/emacs/
https://www.gnu.org/software/emacs/refcards/pdf/refcard.pdf

****** Search for something forward: C-s

I've been using it, it's great!

****** How to continue searching

C-s multiple times.

****** Search for something backward

C-r

****** Search for regular expressions instead of string (forward, backward)

urxvt scrollback-search is already bound for : C-M-s
there is no easy way to disable it atm
note: maybe i'll try the suckless terminal or xterm


C-M-r is working
note: need to learn regex

****** Go to the beginning of the line

C-a

****** Go to the end of the line

C-e

****** Delete a word in front (to the right of the cursor)

C-del


****** Delete a word in back (to the left of the cursor)

M-backspace

****** List all "occurences" of a word in a file


M-x grep or grep-find - Return

enter string and/or specify a file (default directory is set to the currently edited file) - Return

The result will show up in a new windows. C-x-o to switch windows


******* You can copy above instructions into an emacs buffer

******* And test it by showing all occurences of the word "Search"




****** Search (GREP) for a word in all files in a directory RECURSIVELY

M-x grep(-find) - Return
add "-r" to the executed grep command

****** Save the CURRENT buffer

C-x C-s

****** Save ALL open files

C-x s

****** Split the window/buffer vertically

C-x 2

****** Split the window/buffer horizontally

C-x 3

****** Switch between the different windows

C-x o

****** Close all buffers besides the active one
******* Don't kill it!

C-x 1

****** Close only the active buffer

There is no "Close buffer" per se (spent 10 minutes finding it)

The way is to Close the Window: C-x 0

List the buffers by: C-x C-b (you can switch to the buffers from this buffer (ret))


******* Don't kill it

C-x k 
to kill it

****** Kill the active buffer

C-x k

****** Describe/Explain the difference between closing and killing

It's like tmux:

"Closing" just stops the rendering, and it will continue to run in the background.
Killing stops the process and frees up the memory.

****** Switch between buffers that are not shown

C-x b (tab to list buffers)


******* Document two very similar, but slightly different ways

Switch buffers quickly:
C-x <left>
C-x <right>

ido mode should speed up buffer switching (haven't tried)


***** Outcome
****** Document all above commands in your learning org sheet
****** Share your documentation at the end of the session (not before)