Emacs Paredit Notes for OSX
| 02-Jun-2012 | Posted by Sonia Hamilton under Clojure, Emacs |
Some notes on Emacs’ Paredit mode. More so I can stop fighting with Paredit and do some Clojure programming than show any expertise – see Mudphone’s Paredit Preso for the real deal, as well as hagelb’s Paredit screencast notes and the Paredit Cheat Sheet.
- M-( wrap parens around something. Also for { [ “
- M-s remove parens from something
- M-S-s split sexpr into two
- M-S-j join sexprs
- C-q ♦ just do what I say, dammit! force insert of paren or bracket ♦
- C-u DEL force delete paren or bracket
“Barfage and slurpage” ie moving parens left and right. I had some trouble getting this going on OSX, as the terminal doesn’t seem to map control key sequences correctly. After modifying emacs (see below), I got these going:
- C-<right>, C-<left> move right paren right or left
- ESC C-<right>, ESC C-<left> move left paren right or left
I wrote this elisp for my ~/.emacs.d/sonia.el (I’m using Technomancy’s Emacs Starter Kit):
(when (eq system-type 'darwin)
(eval-after-load 'paredit
'(progn
;; C-left
(define-key paredit-mode-map (kbd "M-[ 5 d")
'paredit-forward-barf-sexp)
;; C-right
(define-key paredit-mode-map (kbd "M-[ 5 c")
'paredit-forward-slurp-sexp)
;; ESC-C-left
(define-key paredit-mode-map (kbd "ESC M-[ 5 d")
'paredit-backward-slurp-sexp)
;; ESC-C-right
(define-key paredit-mode-map (kbd "ESC M-[ 5 c")
'paredit-backward-barf-sexp)
)))
Share This
nice,
on my system I needed to take the global assignments of c-> c-< out the system/preferences/keyboard….
funny I am reading exactly the same lisp /clojure books at approximately the same time…..
You’re welcome! Clojure/Lisp is great once you get your head around it; many book to go… Are you doing the 4clojure or Euler problems? A good way to practice.
I will be doing some 4clojure tomorrow. we are tying to start a clojure group in my town and tomorrow we are having a coding dojo where we intend to pick some 4clojure problems and try to solve them…
Cool, nice. The only way I ever learn a language is by writing code in it; I love the idea of “Code Katas” as they usually give a graduated approach to learning the language.
[...] their it was just a matter of balancing parentheses (thanks paredit) by breaking up the problem into stages, starting with calculating the GCD of two [...]
Hi – just stumbled on this trying to figure out why half of my paredit keysequences were not working! Thanks for your help!
You’re welcome Jen!