wujiang

property btnTitle : "Mute audio"

tell application "System Events" to tell application process "zoom.us"
	if exists (menu item btnTitle of menu 1 of menu bar item "Meeting" of menu bar 1) then
		do shell script "echo Unmuted"
	else
		do shell script "echo Muted"
	end if
end tell

wujiang

emacs --daemon to run in the background. emacsclient.emacs24 <filename/dirname> to open in terminal

NOTE: "M-m and SPC can be used interchangeably".

• Undo - C-/
• Redo - C-?
• Change case: 1. Camel Case : M-c 2. Upper Case : M-u

3. Lower Case : M-l

wujiang

-- show running queries (pre 9.2)
SELECT procpid, age(query_start, clock_timestamp()), usename, current_query 
FROM pg_stat_activity 
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%' 
ORDER BY query_start desc;

-- show running queries (9.2)
SELECT pid, age(query_start, clock_timestamp()), usename, query 
FROM pg_stat_activity 
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%' 

wujiang

// Google Forms Slack Notification
// Andy Chase <github.com/andychase>
// License: CC0 1.0 Universal <creativecommons.org/publicdomain/zero/1.0>
// Install 1: This code goes in ( tools > script editor... ) of your google docs form
// Install 2: ( resources > current project triggers ) ( [onSubmit], [from Form], [On form submit] )

// Setup 1: Put your slack api url below
var POST_URL = "https://hooks.slack.com/services/";

function onSubmit(e) {

wujiang

;;; auto-rsync-mode -- minor mode for auto rsync
;;
;; Author: @l3msh0
;;

;;; Example
;;
;; (require 'auto-rsync)
;; (auto-rsync-mode t)
;; (setq auto-rsync-dir-alist

wujiang

Using strace and lsof to debug blocked processes

You can use strace on a specific pid to figure out what a specific process is doing, e.g.:

strace -fp <pid>

You might see something like:

select(9, [3 5 8], [], [], {0, 999999}) = 0 (Timeout)

wujiang

One-line Tree in Python

Using Python's built-in defaultdict we can easily define a tree data structure:

def tree(): return defaultdict(tree)

That's it!