Andy Slezak amslezak

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.

from streams session

end-of-stream - specify a callback to be called when a stream ends (which is surpsingly hard to get right)
duplexify - compose a Duplex stream from a Readable and a Writable stream
pump - pipe streams together and close all of them if one of them closes
pumpify - combine an array of streams into a single duplex stream using pump and duplexify
through2 - tools for making Transform streams
from2 - tools for making Readable streams

from "participatory modules" session

Node.js + OSX 10.10.X

Outline

Below is a quick start guide to developing node.js on OSX. These tools and settings will give you just about everything you would need on a clean install of OSX 10.10.X to get setup and coding.

Install iTerm2

https://www.iterm2.com

	// For quickly trying things out in the browser, jQuery and Lo-Dash (like Underscore.js) are great.

	// Read the code below (never copy & paste code you don't trust),
	// then you can copy & paste it into the browser console to load jQuery & lodash.


	(function () {

	var jq = document.createElement('script');
	jq.src = 'https://code.jquery.com/jquery-2.1.4.js';

	var https = require('https');
	var util = require('util');

	exports.handler = function(event, context) {
	console.log(JSON.stringify(event, null, 2));
	console.log('From SNS:', event.Records[0].Sns.Message);

	var postData = {
	"channel": "#aws-sns",
	"username": "AWS SNS via Lamda :: DevQa Cloud",

	Finding keys and values
	Objects, in Vanilla JavaScript, use the same syntax as arrays
	for accessing property
	values.That is, the square bracket notation but typically with a human - readable
	string, instead of a numerical index.However, the same issues that exist with
	numerical indices and arrays exist with objects and keys too.Just because the key
	is a string doesn 't mean that we know which keys are available. Sometimes, we
	have to search the object to find the key we 're looking for.
	We use the findKey()
	function to locate the key of the first object property that

	# See list of docker virtual machines on the local box
	$ docker-machine ls
	NAME ACTIVE URL STATE URL SWARM DOCKER ERRORS
	default * virtualbox Running tcp://192.168.99.100:2376 v1.9.1

	# Note the host URL 192.168.99.100 - it will be used later!

	# Build an image from current folder under given image name
	$ docker build -t gleb/demo-app .

	// 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*() {

	_.jsonp('https://api.ipify.org/?format=jsonp', function(err, value){
	console.log(err \|\| value);
	});

	{
	"presets": [ "es2015" ]
	}