4 ms·

Paredit mnemonics for slurping and barfing Lisp symbolic expressions

70 points by susam 5y ago

draven 5y ago
See also: the animated guide to paredit: http://danmidwood.com/content/2014/11/21/animated-paredit.html http://danmidwood.com/content/2014/11/21/animated-paredit.ht... for an animated presentation of those commands, plus a few more.
slifin 5y ago
I'm learning structural editing at work at the moment, the most useful ones for me so far have been: - slurp forward - raise
thewakalix 5y ago
Congratulations, you came up with a programming verb that’s even more disgusting than “squelch”.
- casion 5y ago
  Came up with? Slurp/Barf are _at least_ ~35 years old. Possibly more?
  - charcircuit 5y ago
    That doesn't make those terms any less disgusting to use.
- shakna 5y ago
  Squelch is a disgusting verb? Is this one of those "I can't stand the word moist" things?
Snarwin 5y ago
vim-sexp-mappings-for-regular-people [1] uses really easy-to-remember shortcuts for these: - "backward slurp" is "<(" (move opening paren to the left) - "forward slurp" is ">)" (move closing paren to the right) - "forward barf" is "<)" (move closing paren to the left) - "backward barf" is ">(" (move opening paren to the right) [1]: https://github.com/tpope/vim-sexp-mappings-for-regular-people https://github.com/tpope/vim-sexp-mappings-for-regular-peopl...
agumonkey 5y ago
next: paredit-convolute-sexp
clircle 5y ago
Thanks, I will give paredit a shot. I'm a regular emacs user, but I normally use expand-region[1] and cut/paste to edit lisp code. Expand-region usually knows what I want to move around after just one or two calls, only requires one key binding, and has visual feedback. And it works great in every language I have used. [1] https://github.com/magnars/expand-region.el https://github.com/magnars/expand-region.el
volforix 5y ago
Try smartparens. It's a successor to paredit and works for other languages as well. I have never coded (and navigated code) faster than in Clojure on Emacs w/ smartparens.
- Jim_Heckler 5y ago
  Also try Lispy (only for lisps). Works just like SP and Paredit except most commands require a single unmodified key press, but can only be used when point precedes or follows a delimiter or text is selected. Feels like magic.
- tut-urut-utut 5y ago
  For Lisps I prefer parinfer. It just works, no need to learn any new shortcuts.
servytor 5y ago
I'm racking my brains, but in the #lisp channel I read a discussion about dealing with parentheses before paredit, and it was really interesting. I entirely forget the key-chords that were mentioned though...
db48x 5y ago
https://emacsrocks.com/e14.html https://emacsrocks.com/e14.html
redsid 5y ago
cannot do clojure without paredit, which is all finger memory now
melony 5y ago
Any good pre-made keybinding options for VS Code Vim?

70 points by susam 5y ago

See also: the animated guide to paredit: http://danmidwood.com/content/2014/11/21/animated-paredit.html http://danmidwood.com/content/2014/11/21/animated-paredit.ht... for an animated presentation of those commands, plus a few more.

slifin 5y ago

I'm learning structural editing at work at the moment, the most useful ones for me so far have been: - slurp forward - raise

thewakalix 5y ago

Congratulations, you came up with a programming verb that’s even more disgusting than “squelch”.

casion 5y ago
Came up with? Slurp/Barf are _at least_ ~35 years old. Possibly more?
- charcircuit 5y ago
  That doesn't make those terms any less disgusting to use.
shakna 5y ago
Squelch is a disgusting verb? Is this one of those "I can't stand the word moist" things?

Snarwin 5y ago

vim-sexp-mappings-for-regular-people [1] uses really easy-to-remember shortcuts for these: - "backward slurp" is "<(" (move opening paren to the left) - "forward slurp" is ">)" (move closing paren to the right) - "forward barf" is "<)" (move closing paren to the left) - "backward barf" is ">(" (move opening paren to the right) [1]: https://github.com/tpope/vim-sexp-mappings-for-regular-people https://github.com/tpope/vim-sexp-mappings-for-regular-peopl...

agumonkey 5y ago

next: paredit-convolute-sexp

clircle 5y ago

Thanks, I will give paredit a shot. I'm a regular emacs user, but I normally use expand-region[1] and cut/paste to edit lisp code. Expand-region usually knows what I want to move around after just one or two calls, only requires one key binding, and has visual feedback. And it works great in every language I have used. [1] https://github.com/magnars/expand-region.el https://github.com/magnars/expand-region.el

volforix 5y ago

Try smartparens. It's a successor to paredit and works for other languages as well. I have never coded (and navigated code) faster than in Clojure on Emacs w/ smartparens.

Jim_Heckler 5y ago
Also try Lispy (only for lisps). Works just like SP and Paredit except most commands require a single unmodified key press, but can only be used when point precedes or follows a delimiter or text is selected. Feels like magic.
tut-urut-utut 5y ago
For Lisps I prefer parinfer. It just works, no need to learn any new shortcuts.

servytor 5y ago

I'm racking my brains, but in the #lisp channel I read a discussion about dealing with parentheses before paredit, and it was really interesting. I entirely forget the key-chords that were mentioned though...

db48x 5y ago

https://emacsrocks.com/e14.html https://emacsrocks.com/e14.html

redsid 5y ago

cannot do clojure without paredit, which is all finger memory now

melony 5y ago

Any good pre-made keybinding options for VS Code Vim?