Paul Grenier AutoSponge

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.

Better local require() paths for Node.js

Problem

When the directory structure of your Node.js application (not library!) has some depth, you end up with a lot of annoying relative paths in your require calls like:

const Article = require('../../../../app/models/article');

Those suck for maintenance and they're ugly.

	/**
	* Variant of Avraham Plotnitzky's String.prototype method mixed with the "fast" version
	* see: https://sites.google.com/site/abapexamples/javascript/luhn-validation
	* @author ShirtlessKirk. Copyright (c) 2012.
	* Licensed under WTFPL (http://www.wtfpl.net/txt/copying)
	*/

	function luhnChk(luhn) {
	var len = luhn.length,
	mul = 0,

	function lens(get, set) {
	var f = function (a) { return get(a); };
	f.set = set;
	f.mod = function (f, a) { return set(a, f(get(a))); };
	return f;
	}

	var first = lens(
	function (a) { return a[0]; },
	function (a, b) { return [b].concat(a.slice(1)); }

	// based on http://msdn.microsoft.com/en-us/magazine/hh335067.aspx
	// usage example at bottom

	function pso (number_of_dimensions, function_to_optimize, number_of_particles, number_of_iterations, fitness_threshold, inertia_weight, cognitive_weight, social_weight) {
	var particles = [];
	var swarm_best_position = [];
	var swarm_best_fitness = null;
	for (var p = 0; p < number_of_particles; p++) {
	particles.push({
	particle_position: [],

	/**
	* Create an array with `len` elements.
	*
	* @param [initFunc] Optional: a function that returns
	* the elements with which to fill the array.
	* If the function is omitted, all elements are `undefined`.
	* `initFunc` receives a single parameter: the index of an element.
	*/
	function initArray(len, initFunc) {
	if (typeof initFunc !== 'function') {

	/global angular: true, google: true, _ : true /

	'use strict';

	angular.module('geocoder', ['ngStorage']).factory('Geocoder', function ($localStorage, $q, $timeout) {
	var locations = $localStorage.locations ? JSON.parse($localStorage.locations) : {};

	var queue = [];

	// Amount of time (in milliseconds) to pause between each trip to the

	(function(global) {

	global.Functor = function(conf) {
	Functor.types[conf.key] = {
	obj: conf.obj,
	fmap: conf.fmap
	};
	};

	Functor.types = {};

	(function(global) {
	var types = function(obj) {
	throw new TypeError("fmap called on unregistered type: " + obj);
	};

	// inefficient as hell, but as long as there aren't too many types....
	global.Functor = function(type, defs) {
	var oldTypes = types;
	types = function(obj) {
	if (type.prototype.isPrototypeOf(obj)) {

Paul Grenier AutoSponge

The introduction to Reactive Programming you've been missing

This tutorial as a series of videos

Better local require() paths for Node.js

Problem

Possible solutions