.:: Emacs ::.
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# toc
------
  |help|
  |window|
  |rect|
  |mass|
  |grep|
  |lisp|
  |narrow|


# help
=======
  C-h f                 describe function
  C-h b                 list buffer available keymaps
  <kseq> C-h            list possible keymaps with <kseq>
                        eg C-x C-h -> list keymaps beginning with C-x

# window
=========
  C-x 0         kill focused window
  C-x 1         kill all other windows
  C-x 2         split horizontal
  C-x 3         split vertical

# block/rect
=============
  C-x <SPC>                     activate rectangle-mark-mode
  M-x string-rectangle <RET>    insert text in marked rect

# mass edit
============
  C-x h                                 mark whole buffer (mark-whole-buffer)
  M-x delete-matching-line <RET>        delete lines matching regex
  M-x %                                 search & replace region (query-replace)
  C-M-x %                               search & replace regex (query-replace-regexp)

# grep
=======
  M-x find-grep <RET>           run find-grep result in *grep* buffer
  n/p                           navigate next/previous match in *grep* buffer

# lisp mode
============
  M-x lisp-interaction-mode     activate lisp mode
  C-M-x                         evaluate top expr under cursor
  C-x C-e                       eval-last-sexp
  C-u C-x C-e                   eval-last-sexp and prints result in current buffer

# narrow
=========
  C-x n n               show only focused region (narrow)
  C-x n w               show whole buffer (wide)

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