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DHT Walkthrough Notes

I've put together these notes as I read about DHT's in depth and then learned how the libtorrent implementation based on the Kademlia paper actually works.

What problem does this solve?

400,000,000,000 (400 billion stars), that's a 4 followed by 11 zeros. The number of atoms in the universe is estimated to be around 10^82. A DHT with keys of 160 bits, can have 2^160 possible numbers, which is around 10^48

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

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.

	// Create a Promise that resolves after ms time
	var timer = function(ms) {
	return new Promise(resolve => {
	setTimeout(resolve, ms);
	});
	};

	// Repeatedly generate a number starting
	// from 0 after a random amount of time
	var source = async function*() {

	RN < 0.50 - watchman watch-del-all && rm -rf $TMPDIR/react-* && rm -rf node_modules/ && npm cache clean && npm install && npm start -- --reset-cache
	RN >= 0.50 - watchman watch-del-all && rm -rf $TMPDIR/react-native-packager-cache-* && rm -rf $TMPDIR/metro-bundler-cache-* && rm -rf node_modules/ && npm cache clean && npm install && npm start -- --reset-cache
	RN >= 0.63 - watchman watch-del-all && rm -rf node_modules && npm install && rm -rf /tmp/metro-* && npm run start --reset-cache

	npm >= 5 - watchman watch-del-all && rm -rf $TMPDIR/react-* && rm -rf node_modules/ && npm cache verify && npm install && npm start -- --reset-cache

	Windows - del %appdata%\Temp\react-native-* & cd android & gradlew clean & cd .. & del node_modules/ & npm cache clean --force & npm install & npm start -- --reset-cache

	language: node_js

	node_js:
	- iojs

	env:
	global:
	# https://docs.saucelabs.com/ci-integrations/travis-ci/
	# SAUCE_USERNAME
	- secure: Daa...

	var Browserify = require('browserify');
	var Readable = require('stream').Readable;

	function stringStream(content) {
	var s = new Readable();
	s.push(content);
	s.push(null);
	return s;
	}

	// Refer to https://gist.github.com/remy/350433
	try {
	// Test webstorage existence.
	if (!window.localStorage \|\| !window.sessionStorage) throw "exception";
	// Test webstorage accessibility - Needed for Safari private browsing.
	localStorage.setItem('storage_test', 1);
	localStorage.removeItem('storage_test');
	} catch(e) {
	(function () {
	var Storage = function (type) {

	Content = (DocType / Comment / BalancedTag / SelfClosingTag / Text)*

	DocType = "<!doctype " doctype:[^>]* ">" {
	return {
	type: 'DocType',
	content: doctype.join('')
	};
	}

	Comment = "<!--" c:(!"-->" c:. {return c})* "-->" {

	/* Config - set the right values in the PhoneGap config.xml
	******************************************************************************/
	gulp.task('config', function () {
	return gulp.src([srcDir + '/config.xml'])
	.pipe(cheerio({
	run: function ($) {
	// get the version number from package.json
	$('widget').attr('version', require('./package').version);

	// in development launch the app with a different html file

	// use like this:
	// process.emit( 'app:log', module, arg1, arg2, ..., argN );

	var Module = require('module');

	function logConsole(method, module) {
	var args = [(new Date()).toJSON(), method];
	var index = 1;

	if (module instanceof Module) {