Lehel Vass vasslehel

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.

Possible solutions

This article has been given a more permanent home on my blog. Also, since it was first written, the development of the Promises/A+ specification has made the original emphasis on Promises/A seem somewhat outdated.

You're Missing the Point of Promises

Promises are a software abstraction that makes working with asynchronous operations much more pleasant. In the most basic definition, your code will move from continuation-passing style:

getTweetsFor("domenic", function (err, results) {
 // the rest of your code goes here.

	Add the `replication` section to the mongod.conf file:

	```
	$cat /usr/local/etc/mongod.conf
	systemLog:
	destination: file
	path: /usr/local/var/log/mongodb/mongo.log
	logAppend: true
	storage:
	engine: mmapv1

	<!doctype html>
	<html>
	<head>
	<meta charset="utf-8" />

	<title>
	Creating Custom DOM And Host Event Bindings In Angular 2 Beta 6
	</title>

	<link rel="stylesheet" type="text/css" href="./demo.css"></link>

	function wp_api_encode_acf($data,$post,$context){
	$data['meta'] = array_merge($data['meta'],get_fields($post['ID']));
	return $data;
	}

	if( function_exists('get_fields') ){
	add_filter('json_prepare_post', 'wp_api_encode_acf', 10, 3);
	}

	var gulp = require('gulp'),
	sass = require('gulp-sass'),
	browserify = require('gulp-browserify'),
	concat = require('gulp-concat'),
	embedlr = require('gulp-embedlr'),
	refresh = require('gulp-livereload'),
	lrserver = require('tiny-lr')(),
	express = require('express'),
	livereload = require('connect-livereload')
	livereloadport = 35729,

	<!DOCTYPE html>
	<html>
	<head>
	<meta charset=utf-8 />
	<title>Holy Grail</title>
	<style>
	/* some basic styles. nothing to do with flexbox */
	header, footer,
	nav, article, aside {
	border: 1px solid black;