andros
9ddd118a49
Replace standard iOS components with a terminal-inspired design: monospaced typography throughout, flat square borders, Emacs-style modeline header, filetag keyword format (:kw1:kw2:), and custom flat form replacing the iOS Form component. Set Emacs as default theme. Replace non-Emacs demo notes with Emacs ecosystem content and rename screenshots.
1.1 KiB
1.1 KiB
Elisp Fundamentals
Data types
;; Numbers
42
3.14
;; Strings
"Hello, Emacs!"
;; Symbols
'my-symbol
;; Lists
'(1 2 3)
'(a b c)
;; Cons cells
(cons 1 2) ; => (1 . 2)Defining functions
(defun greet (name)
"Return a greeting for NAME."
(format "Hello, %s!" name))
(greet "Emacs") ; => "Hello, Emacs!"let and let*
(let ((x 10)
(y 20))
(+ x y)) ; => 30
;; let* allows forward references
(let* ((x 10)
(y (* x 2)))
y) ; => 20Useful built-ins
| Function | Description |
|---|---|
| car / cdr | Head / tail of a list |
| mapcar | Map function over list |
| seq-filter | Filter list by predicate |
| string-join | Join list of strings |
| number-to-string | Convert number to string |
| message | Print to minibuffer |