Anh Le (Andy) anhldbk

1. Overview

This is an example of using module tls in NodeJS to create a client securely connecting to a TLS server.

It is a modified version from documentation about TLS, in which:

The server is a simple echo one. Clients connect to it, get the same thing back if they send anything to the server.
The server is a TLS-based server.
Clients somehow get the server's public key and use it to work securely with the server

2. Preparation

What are non-Bitcoin applications of blockchain technology?

"In 2015 Uber, the world's largest taxi company owns no vehicles, Facebook the world's most popular media owner creates no content, Alibaba the most valuable retailer has no inventory, and Airbnb the world's largest accommodation provider owns no real estate."*

Through collaboration and value distribution, decentralized autonomous organizations (DAOs) will be just as disruptive to the above centralized business models.

	'use strict'

	const os = require('os')
	const crypto = require( "crypto" )
	const _ = require('lodash')

	// Get MAC addresses of public interfaces
	// @return: List of addresses
	function getPublicInterfaces(){
	// get network interfaces

	'use strict'

	const _ = require('lodash'),
	path = require('path')

	/**
	* Class for matching MQTT-like topics
	*/
	class EventTree {
	constructor() {

	// g++ -lstdc++ -Wno-write-strings fetch.cpp -o fetch
	#ifdef _WIN32 // Windows
	#include <winsock2.h>
	#include <ws2tcpip.h>
	#define MSG_NOSIGNAL 0
	#else // Linux + Mac

	#include <sys/types.h>
	#include <sys/socket.h>
	#include <netinet/in.h>

	// Demo on how to use ES6 decorators
	// HOW TO RUN
	// $ yarn add --dev babel-plugin-transform-decorators-legacy
	// $ babel-node --plugins transform-decorators-legacy test.js
	'use strict'

	@meta({
	manufacturer: 'evolas'
	})
	class Data {

	// https://www.coursera.org/learn/cryptocurrency/programming/KOo3V/scrooge-coin
	import java.security.PublicKey;
	import java.util.ArrayList;
	import java.util.HashSet;
	import java.util.Set;
	import java.util.concurrent.ConcurrentHashMap;


	public class TxHandler {
	private UTXOPool pool;

	sudo apt-get install netcat openssl libpcre3 dnsmasq procps perl

	# for ubuntu 16.04 (xenial)

	sudo apt-get -y install postgresql postgresql-contrib phppgadmin
	sudo -i -u postgres

	psql
	CREATE USER kong; CREATE DATABASE kong OWNER kong;
	ALTER USER kong WITH password 'kong';

	# Write a password generator that meets these four criteria:
	# 1- The password length is always 4
	# 2- The password should consist letters and numbers from {A-F}, {a-f} and {1-6} and pick at least one from each of these(randomly)
	# 3- No duplicate passwords generated
	# 4- The password is generated totally randomly

	array = list('ABCDEFabcdef123456')
	count = 0

	def print_passwd(passwd):

	// This is a minor modificatioin for the one wrongly implemented in http://www.geeksforgeeks.org/median-of-stream-of-integers-running-integers/
	// Heapification
	// Note that, for the current median tracing problem
	// we need to heapify only towards root, always
	void heapify(int i, bool down= false)
	{
	if (!down){
	// heapify up
	int p = parent(i);

Anh Le (Andy) anhldbk

1. Overview

2. Preparation

What are non-Bitcoin applications of blockchain technology?

Currency