Emacs LISP Notes

emacs.el

; Use this to drop into a debugger when a error occurs: M-x toggle-debug-on-error 

; Trying to figure out how namespaced elisp functions work: https://www.greghendershott.com/2017/02/emacs-themes.html
(defun dh/foo (x)
  "adds 4 to x"
  (+ x 4))
(dh/foo 1)
(defun dh/bar (x, fn)
  "adds 5 to fn(x)"
  (+ 5 (fn x)))
(dh/bar 7 #'dh/foo)

; passing a function as an argument & evaluating it
(defun plus1 (x) (+ 1 x))
(defun callfn (fn x) (funcall fn x))
(callfn 'plus1 2)

; define & save a custom keyboard macro
; 1. define the macro ;; C-x ( ... C-x )
; 2. M-x name-last-kbd-macro  ;; give it a name
; 3. M-x insert-kbd-macro     ;; dumps the macro definition to your current cursor location
; 4. copy the macro definition into init.el for posterity

; evaluate any elisp function (not just interactive functions)
; M-: <function>