Junlapong L. junlapong

Network

Find who is listening on a given TCP port on macOS

https://stackoverflow.com/a/4421674/1849597

On macOS Big Sur and later, use this command:

###While this script does concatenate pdf files, I haven't yet figured out in which order it does so. On a sample of 19 pdf files, logically named 01something.pdf, 02something.pdf, 03something.pdf, etc. the order of the merged product seemed almost random...

...from Tiger onwards, OSX ships with a Python script that concatenates pdf files (merges them together). The script is already executable, and Python is pre-installed on OS X, so all you need to do is point it at your pdf files and run

"/System/Library/Automator/Combine PDF Pages.action/Contents/Resources/join.py" -o PATH/TO/YOUR/MERGED/FILE.pdf /PATH/TO/ORIGINAL/1.pdf /PATH/TO/ANOTHER/2.pdf /PATH/TO/A/WHOLE/DIR/*.pdf

I prefer putting the link in /usr/local/bin, as it is in the $PATH and therefore I can run the command from anywhere. To set up the link, you need to navigate to the directory where you want the link.

Problem

A lot of GitHub projects need to have pretty math formulas in READMEs, wikis or other markdown pages. The desired approach would be to just write inline LaTeX-style formulas like this:

$e^{i \pi} = -1$

Unfortunately, GitHub does not support inline formulas. The issue is tracked here.

Investigation

1. Clone your fork:

git clone git@github.com:YOUR-USERNAME/YOUR-FORKED-REPO.git

2. Add remote from original repository in your forked repository:

cd into/cloned/fork-repo
git remote add upstream git://github.com/ORIGINAL-DEV-USERNAME/REPO-YOU-FORKED-FROM.git
git fetch upstream

Go (Golang) Standard Library Interfaces (Selected)

This is not an exhaustive list of all interfaces in Go's standard library. I only list those I think are important. Interfaces defined in frequently used packages (like io, fmt) are included. Interfaces that have significant importance are also included.

All of the following information is based on go version go1.8.3 darwin/amd64.

	# updated version here: https://gist.github.com/garystafford/8196920

	# loosely based on post from ArchWiki and Alan Pope
	# https://wiki.archlinux.org/index.php/proxy_settings
	# this is alternative to git config

	# configure proxy for git while on corporate network
	function proxy_on(){
	read -s -p "Enter Password: " PASSWORD
	export PROXY_SERVER=my_proxy

	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8" />
	<title>Camera</title>
	</head>
	<body>
	<video id="camera" autoplay playsinline></video>
	<script>
	const videoElement = document.getElementById("camera");

	#!/bin/bash

	###
	# brew install upx
	###

	color=46;
	if [ $# -eq 0 ]; then
	echo "[USAGE] gotiny [filename.go]"
	echo "----------------------------"

	package main
	import (
	"net/http"
	"log"
	)

	func redirect(w http.ResponseWriter, req *http.Request) {
	// remove/add not default ports from req.Host
	target := "https://" + req.Host + req.URL.Path
	if len(req.URL.RawQuery) > 0 {