Emacs training day 1

Emacs movements and concepts

function vs command : commands are interactive functions
variable and option : options are customizable variables
C-h v : describe variables and options
C-h f : describe functions and commands
C-h k : describe key
last-command : variable containing the last command
this-command : variable containing the command being executed
mark : the mark is generally interactively set with C-SPC
C-u C-SPC (or C-u C-@) : cycle through the local mark ring
C-x C-SPC (or C-x C-@) : cycle through the global mark ring
selection : the selection is not necessarily highlighted
region : the selection is not necessarily highlighted
(transient-mark-mode 1) : toggle the highlighting of the region
M-x customize-face RET region : set the “region” face
C-x r t : string-rectangle : insert text at the beginning of the region
C-M-\ : indent-region
C-l : recenter

Manipulating Lisp and symbolic expressions (sexps)

C-M-f : forward sexp
C-M-b : backend sexp
C-M-a : beginning of defun
C-M-e : end of defun
C-M-k : kill sexp
C-M-@ : mark sexp

Org-mode movement

M-RET / M-<up/down> / M-<left/right>
C-c C-t : add TODO keywords
S-<left/right> : switch TODO keywords
C-u C-c C-c : on lists, add/remove checkboxes
M-h (then repeat) : select current element
C-h v org-special-ctrl-a/e RET (t is a good choice)
<s at the beginning of a line to insert code block
C-h org-src-fontify-natively RET (t is a good choice)
C-c ^ : org-sort (in lists, tables, subtrees, buffer)
M-<up/down> to move up/down paragraphs
C-x C-e to eval the sexp (both in emacs-lisp-mode and org-mode)

Search

C-s C-w : to search for the word at point
C-s M-e : to edit the current search string
C-s M-p/n : browse the search history
C-s C-M-i : complete over the search history
C-s M-s r : toggle regexp search (very handy!)
C-s M-s o : run occur on the current search string
C-s M-s c : toggle case-folding
C-s M-s SPC : toggle whitespace lax search

Dired

M-x dired RET
m to mark files
t to toggle marks
C-x C-q to toggle read-only mode
Q to replace-regexp in selected files
M-x find-grep RET : run find and exec grep
M-x rgrep RET : recursively grep

Org-mode caldav

Regular expressions

introduction to the re syntax
use within re-search-forward

Interactive calls

Exploring interactive.

Narrowing C-x n

C-x n n : narrow-to-region
C-x n s : narrow-to-subtree
C-x n w : widen

Save match data

save-match-data

Instrumenting a function

M-x edebug-defun RET

15 minutes tutorial emacs-doctor

Check https://bzg.fr/en/learn-emacs-lisp-in-15-minutes.html/

What’s new in this tutorial:

lisp-interaction-mode
switch-to-buffer-other-window
get-buffer-create
erase-buffer
insert
format
(progn (+ 1 2) (+ 3 5))
(setq myliste '(1 2)) (push 0 myliste)
(mapcar (lambda(s) (1+ s)) '(1 2))
(mapconcat (lambda(s) (concat s "@")) '("a" "b" "c") "-")
while
replace-match
add-text-properties
other-window
car, cdr