Discover gists

Regular Event Loop

This shows the execution order given JavaScript's Call Stack, Event Loop, and any asynchronous APIs provided in the JS execution environment (in this example; Web APIs in a Browser environment)

Given the code

Adding and removing static host mappings on EdgeRouter

Tested on a Ubiquiti EdgeRouter 4 with dnsmasq enabled for DHCP (and DNS) serving.

These operations can also be carried out in the EdgeRouter web gui with the "DNS host names" Wizard (click the "Wizards" tab and then select "DNS host names" to access).

To see all currently statically mapped hosts:

$ cat /etc/hosts

Source

Get the first Monday of a month (and more)

This is a small cheat sheet for PHP's strtotime function, which can be used to convert textual sentences such as "next Friday" and "last Monday" into UNIX timestamps and formatted dates.

In the examples below, I've used the format "j, d-M-Y", which will give you something like: Monday, 17-Aug-2015. You can change this to your format of choice

	#!/bin/bash

	rm -rf /home/yen3/ubuntu.qcow2
	qemu-img create -f qcow2 /home/yen3/ubuntu.qcow2 10G

	virsh undefine ubuntu1604arm64 --nvram

	install_from_localtion() {
	virt-install -n ubuntu1604arm64 --memory 1024 --arch aarch64 --vcpus 1 \
	--disk /home/yen3/ubuntu.qcow2,device=disk,bus=virtio \

	// ==UserScript==
	// @name Bilibili VIP
	// @namespace http://tampermonkey.net/
	// @version 0.1
	// @description 不给叔叔送钱
	// @author You
	// @match ://www.bilibili.com/bangumi/play/
	// @match ://www.bilibili.com/video/
	// @connect api.bilibili.com
	// @icon https://www.bilibili.com/favicon.ico

	; 1 2 3 4 5 6 7
	;01234567890123456789012345678901234567890123456789012345678901234567890
	;=======================================================================
	;+---------------------------------------------------------------------+
	;\| \|
	;\| Example using brk() system call for dynamic memory allocations. \|
	;\| \|
	;\| DON'T CONFUSE that brk() used in C Function is different with brk() \|
	;\| systemcall (systemcall 45 for x86 ASM). \|
	;\| \|

	...
	{

	services.samba = {
	enable = true;

	syncPasswordsByPam = true;
	# You will still need to set up the user accounts to begin with:
	# $ sudo smbpasswd -a yourusername

	# Alternative to a doubly-nested loop
	# Imagine I want to perform an operation on a data frame
	# once for each combination of two variables, such as Country and Year
	# I can do this with a nested loop, or I can do this with (among other
	# things) lapply()

	# Generate random data:
	allCountries <- LETTERS[1:10]
	allYears <- 1990:2012

	' Disables Vanguard from starting when you boot your computer
	Call CreateObject("Shell.Application").ShellExecute("cmd.exe", "/c ""sc config vgc start= disabled & sc config vgk start= disabled""", "", "runas")