TheYarin’s gists

TheYarin / AsyncLock.ts

Last active February 3, 2022 17:11

A cute typescript async lock class I scribbled down

	// You can either use lock() and get a function that releases the lock, or you could use lockAndRun() to wrap around a function! Amazing!
	class AsyncLock {
	private promises = new Map<string, Promise<void>>();

	public async lock(key: string): Promise<VoidFunction> {
	if (this.promises.has(key)) {
	await this.promises.get(key);
	}
	let release: VoidFunction;
	const lockPromise = new Promise<void>(resolve => {

TheYarin / yarn-download.sh

Last active July 18, 2020 18:12

Using yarn for an offline environment setup, including a script that uses yarn to download packages and their dependencies as tgz archives. Compatible with git bash on windows.

	#!/bin/bash

	set -e

	if [[ $# -eq 0 ]]; then
	echo "Usage: $(basename $0) [packages ...]"
	exit
	fi

	if ! command -v yarn &> /dev/null; then

TheYarin / typescriptreact.json

Last active May 2, 2020 17:43

A useful VSCode snippet that generates a React class component with all the Material-UI styling boilerplate built in.

	{
	// Place your snippets for typescriptreact here. Each snippet is defined under a snippet name and has a prefix, body and
	// description. The prefix is what is used to trigger the snippet and the body will be expanded and inserted. Possible variables are:
	// $1, $2 for tab stops, $0 for the final cursor position, and ${1:label}, ${2:another} for placeholders. Placeholders with the
	// same ids are connected.
	// Example:
	// "Print to console": {
	// "prefix": "log",
	// "body": [
	// "console.log('$1');",

TheYarin / tunnel.sh

Created January 16, 2020 22:46

ssh tunneling

ssh -fN -L 0.0.0.0:8000:192.168.99.100:80 user@target

TheYarin / download-npm.sh

Created January 13, 2019 18:02

Download an npm package, and compress it to a zip archive. No unnecessary files left behind.

	# Usage: download-npm.sh <package-name>
	#!/bin/bash

	set -e
	set -u

	NC='\033[0m'
	LIGHT_GREEN='\033[1;32m'

	libName="$1"

TheYarin / clear-folder-on-creation.sh

Created January 13, 2019 17:27

Clear a folder when it is "created". For example, when a flash drive is connected and mounted to /path/to/containing/folder, clear the folder inside of it named FOLDER_NAME

	inotifywait -mq --format '%w%f/FOLDER_NAME/' --event=CREATE /path/to/containing/folder \| while read DIR_TO_CLEAR
	do
	echo "$DIR_TO_CLEAR"
	sleep 1
	find "$DIR_TO_CLEAR" -delete
	mkdir -p "$DIR_TO_CLEAR"
	done

TheYarin / IPRegex.cs

Created January 13, 2019 17:04

A good IPv4 regex in C#. Should work for most languages with some tweaks.

	const string ZERO_TO_255 = "(25[0-5]\|2[0-4][0-9]\|1[0-9]{2}\|[1-9][0-9]\|[0-9])";
	static readonly string IP_REGEX_PATTERN = $@"({ZERO_TO_255}\.){{3}}{ZERO_TO_255}";
	static readonly Regex FindIPRegex = new Regex(IP_REGEX_PATTERN, RegexOptions.Compiled);
	static readonly Regex ValidateIPRegex = new Regex($"^{IP_REGEX_PATTERN}$", RegexOptions.Compiled);

TheYarin / check-internet.sh

Last active June 10, 2019 06:16

Log internet connection failures

	#!/bin/bash

	# Hit Ctrl+C a lot of times to stop

	# Ping google's 8.8.8.8 DNS server
	while true; do
	timeout 1 ping -q -c 1 8.8.8.8 > /dev/null && echo $(date +%Y/%m/%d_%H:%M:%S) GOOD && sleep 1 \|\| echo $(date +%Y/%m/%d_%H:%M:%S) NO INTERNET;
	done