Mastering emacs shortcuts and important stuff. Under frequent revision...

key	Cmd
C-x d	Open Dir
C-g	Quit all the things
C-x C-f	File Open
C-x C-s	File Save
C-x C-c	exit emacs
C-x k	Kill Buffer
C-x <-/->	Previous/Next Buffer
C-x C-b	List all buffers - ibuffer
C-x b	Open/new buffer

Misc

key	Cmd
C-8 something	Repeate
C-v	Scroll down
M-v	Scroll up
C-M-v	Scroll down other window
C-M-- C-M-v	Scroll up the other window
C-u M-|	run shell command on selection (eg python -m json.tool)

Movement

key	Cmd
C-M-b	beginning of the sexp
C-M-f	end of the sexp
C-a	Move to the beggining of the line
M-m	Move to first non white space in line
C-e	Move to end of line
M-f	Move forward one word
M-b	Move backwards one word
C-f	Move forward one character
C-b	Move backwords one character
C-p	Move to previous line
C-n	Move to next line
M-</> (C-u C-SPC)	Move to begining/end of buffer
C-SPC C-SPC	Sets the mark but disables the region
C-x C-x	Exchanges the point and the mark and reactivates the last region
M-g g	Go to Line
M-i	imenu (List functions in buffer)
C-r	Scrolls buffer around line (cool for quick look ups)
M-@	mark word

HELM

key	Cmd
C-x c	prefix
C-x c C-c g	google completion

Paredit

key	Cmd
M-(	Wrap
C-right	Forward slurp
C-M-left	Backward slurp
C-left	Forward barf
C-M-right	Backward barf
C-M-k	Kills the balanced exp
C-M-f/b	Move between sexp
C-M-n/p	Move forward to the next/pevious list
C-M-d/u	Move down/up into a list
C-SPC	Select sexp

Search and replace

key	Cmd
C-s/C-r	Regex search in buffer. C-s/C-r again to cycle
C-w	Adds word at point to search string
C-M-y/w	Adds/removes char at point
M-s w	Toggles word mode
M-x occur	Isearch like nice feature
(M-g) M-n/p	Cycle occurences
e	switch to occur edit mode
C-c C-c	Exists edit mode and applies changes
M-x multi-occur-in-matching-buffers	multi occur
C-M-%	query regexp search and replace (works from isearch)
M-%	query search and replace (works from isearch)
y . , ! u	confirm/replace and exit/replace and stay/all/undo

Selection / kill Ring

key	Cmd
C-spc	Create selection
backspace	Delete selected region
C-w	Kill region
M-w	Copy Region - add to Ring
M-d	Deletes word - adds to Kill Ring
C-y	Yanks killed text
M-y	Cycles next item on Kill Ring
C-k	Kill Line from point
C-S-BKS	Kill line
C-cy	Yank menu
C-M-k	Kill s-expression
C-M-w	Apperd new kill to an old kill

Commands M-x

key	Cmd
package-list-packages	Handling Packages
package-refresh-contents
package-install
replace-string	replaces string in buffer or selected region
cider-jack-in	fires cider repl
upcase-initials-region	Capitalizes region
count-words	Counts lines, words, and characters in buffer
count-matches
delete-duplicate-lines
flush(keep)-lines	Flushes or deletes lines in a buffer (usefull for logs)
delete-trailing-whitespace	Deletes all trailing whitespace
sort-line
align-regex	aligns region usig regex in the minibuffer
C-u M-c align-regex.	complex align command, aligns multiple columns. bit brainfuck

Help

key	Cmd
C-h s	Syntax table
C-h k bindind	get help for keybinding
C-h f	get help for function
prefix C-h	get help for any key prefix
C-h a	apropos command (list commands that match a pattern). Also check M-x apropos-variable
M-x info or C-h i	info manual
M-x info-appropos	Search info manual for a string
C-h d	Search doc strings of elisp code
C-h m	lists buffer active modes and all the keybidings they add

Windows

key	Cmd
C-x o	Switch to another window
C-x 1	Delete all other windows, leaving only the current one. Does not close buffers
C-x 2	Split frame above and below
C-x 3	Split horizontal
C-x 0	Delete current window
C-c left/rig	Undo/redo window state (needs winner-mode on)
S-arrows	Move around frames

Repl/Cider

key	Cmd
C-c M-j	cider jack in
C-h m	Help in cider
C-x C-e	Evaluate in repl
C-c M-n	Set namespace in repl
C-c C-k	Compile current buffer in the repl session
C-up/down	repl history
C-c C-d C-d	Docs in the repl, q to quit
M-./M-,	Show source code in the repl, return to repl
C-c C-d C-a	find arbitrary search across function names and docs
C-c M-p	Load the form preceding point in the REPL buffer.
C-c C-b	Interrupt repl evaluation
C-c C-o	clean last repl output
C-c M-n	Select namespace
C-c C-u	Kill input
C-p/n	navigate downwards/upwards (RET to past exp in input)
M-p/n	after cider-repl-next-matching-input
C-M-r	cider restart
C-c u	cider user ns in repl
C-c C-t C-t	runs test
C-c C-t C-n	runs all tests in namespace
C-c C-u	undefine symbols if you delete a test from the test namespace

Editing

key	Cmd
C-M-q	Reindents sexp
C-M-\	Indents region using major mode indent command
C-x TAB	Hard indent
C-/	Undo
C-j	New Line and Indent (now RET)
M-/	DAbbrev (configured as Hippie Expand) - expands word at the point, press again to cycle
C-M-/	DAbbrev (configured as Hippie Expand) - cycles through possible expansions of the text before point
M-\	Delete all spaces and tabs around point
C-d	Deletes the caracter at point
M-d	Kill word
C-M-k	kill s-expression
C-t	transpose characters
M-t	transpose words (ignores symbols)
C-M-t	transpose s-expressions
C-x C-t	transpose lines
M-q	Refill command (commands and stuff)
C-x C-;	comments current line
M-j	indent new line in comment
C-x C-u/l	Upper(lower)cases the region
M-c	Capitalizes next word, (M-- inverts)
M-u/l	Upper(lower)cases next word, (M-- inverts)
C-o	Inserts a blank line after point
C-x C-o	Deletes all blank lines after the point
M-ˆ	Joins the line the point is on with the one above
C-x C-t	Transposes lines
C-t	Transposes char
M-q	Refils Paragraph/comments (C-x f sets fill width)
M-z	kills up to a given character

Dired

Key	Cmd
C-x d	Prompts for dir
C-d	lists dir when for instance in open file mode
i	appends sub-dir to buffer
q	returns to parent dir

Projectile

Key	Cmd
C-c p f	projectile-find-file

Bookmarks

key	Cmd
C-x r m	Set a bookmark
r l	List bookmarks
r b	Jump to bookmarks

Registers

key	Cmd
C-x r s	Store region in registry
C-x r j	jump to register
C-x r i	insert content of register

Grep

key	Cmd
M-x rgrep	recursive grep with a bunch of defaults
M-g M-n	Next occurence
M-g M-p	Previous occurence

Debug

key	Cmd
C-u C-M-x	evaluate function

Multiple cursors

key	Cmd
C-S-c C-S-c	Cursors in region
C-,	mark-previous-like-this
C-.	mark-next-like-this
C-c C-,	mark-all-like-this
C-x r y	pastes multiple cursor (rectangle kill ring)

spell checking

key	Cmd
M-$	spell check word
M-x flyspell-mode	minor mode that highlights spelling errors
M-x flyspell-prog-mode	spell checks comments and doc string
M-x ispell-buffer	Runs spell check on buffer
M-x ispell-region

• more useful stuff on how to use flyspell minor mode on Mastering Emacs

Notes

Buffer variables: doing a setq only sets the variable for the current buffer: ex:

• show-trailing-whitspace
• auto-complete-mode

VC mode

key	Cmd
C-x v =	diff against head
C-x v u	discard changes

ORG mode

key	Cmd
C-c C-t	convert to TODO
M-Shift <-/->	sub unsub task