Janaka Janaka-Steph

The introduction to Reactive Programming you've been missing

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

A description of known problems in Satoshi Nakamoto's paper, "Bitcoin: A Peer-to-Peer Electronic Cash System", as well as notes on terminology changes and how Bitcoin's implementation differs from that described in the paper.

Abstract

The longest chain not only serves as proof of the sequence of events witnessed, but proof that it came from the largest pool of CPU power.

Make Ethereum massively scalable today with delayed computations

Suppose you're writing a contract which involves a huge amount of participants. As an example, think of an online, blockchain-based Trading-Card Game with tournaments. How would you program a playCard function? You might be thinking of something like this:

function playCard(uint player, uint card){
    ...
    else if (card == PROFESSOR_OAK){
        // shuffles the player's hand on his deck
 shuffleHand(player)

	/**
	* Convert From/To Binary/Decimal/Hexadecimal in JavaScript
	* https://gist.github.com/faisalman
	*
	* Copyright 2012-2015, Faisalman <[email protected]>
	* Licensed under The MIT License
	* http://www.opensource.org/licenses/mit-license
	*/

	(function(){

	var db = mongoose.connect('mongodb://localhost:27017/DB');

	// In middleware
	app.use(function (req, res, next) {

	// action after response
	var afterResponse = function() {
	logger.info({req: req}, "End request");

	// any other clean ups


	$bitcoind getinfo
	{
	"version" : 99900,
	"protocolversion" : 70002,
	"walletversion" : 60000,
	"balance" : 15.74900000,
	"blocks" : 226032,
	"timeoffset" : -4,
	"connections" : 9,

	#!/bin/sh

	set -e
	set -x

	for package in $(npm -g outdated --parseable --depth=0 \| cut -d: -f3)
	do
	npm -g install "$package"
	done

	---
	- name: Initial Odroid Setup
	hosts: odroids-local
	user: root
	vars:
	- root_password: 'HASHED ROOT PASSWORD HERE'
	- <YOUR USER>_password: 'USER PASSSWORD HERE'

	tasks:
	- name: Change root password


	/*
	Basically "web3" comes from Mist,
	but "Web3" CAN come from the dapp.

	A Dapp has 3 ways to use web3.
	2. and 3. would work when in Mist and outside.
	*/

	// 1. simply use, web3 comes already defined

	/eslint-disable no-console, no-var /
	import express from 'express'
	import webpack from 'webpack'
	import webpackDevMiddleware from 'webpack-dev-middleware'
	import WebpackConfig from './webpack.config'
	import path from 'path'

	const app = express()

	if (process.env.NODE_ENV === 'development') {