Dave Schumaker daveschumaker

JavaScript Best Practices

Code conventions

Closing/opening brackets

Although this isn't a problem in other languages, because of semicolon insertion, there could be problems if you don't place the bracket on the opening line:

// no:
function()
{

Creating a Happy Git Environment on OS X

Step 1: Install Git

brew install git bash-completion

Configure things:

git config --global user.name "Your Name"

git config --global user.email "[email protected]"

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

Virtual Hosts on nginx (CSC309)

When hosting our web applications, we often have one public IP address (i.e., an IP address visible to the outside world) using which we want to host multiple web apps. For example, one may wants to host three different web apps respectively for example1.com, example2.com, and example1.com/images on the same machine using a single IP address.

How can we do that? Well, the good news is Internet browsers

	function keepTrying(otherArgs, promise) {
	promise = promise\|\|new Promise();

	// try doing the important thing

	if(success) {
	promise.resolve(result);
	} else {
	setTimeout(function() {
	keepTrying(otherArgs, promise);

	#!/bin/sh

	echo "What should the Application be called (no spaces allowed e.g. GCal)?"
	read inputline
	name="$inputline"

	echo "What is the url (e.g. https://www.google.com/calendar/render)?"
	read inputline
	url="$inputline"

	#301 Redirects for .htaccess

	#Redirect a single page:
	Redirect 301 /pagename.php http://www.domain.com/pagename.html

	#Redirect an entire site:
	Redirect 301 / http://www.domain.com/

	#Redirect an entire site to a sub folder
	Redirect 301 / http://www.domain.com/subfolder/

	CREATE secure_login (
	`id` INT(11) UNSIGNED NOT NULL AUTO_INCREMENT,
	`email` VARCHAR(120) NOT NULL,
	`salt` VARCHAR(8) NOT NULL,
	`password` VARCHAR(40) NOT NULL,
	`session` VARCHAR(40) DEFAULT NULL,
	`disabled` TINYINT(1) UNSIGNED DEFAULT 0,
	`created_dt` DATETIME DEFAULT '0000-00-00 00:00:00',
	`modified_ts` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
	PRIMARY KEY (`id`),

	// List all files in a directory in Node.js recursively in a synchronous fashion
	var walkSync = function(dir, filelist) {
	var fs = fs \|\| require('fs'),
	files = fs.readdirSync(dir);
	filelist = filelist \|\| [];
	files.forEach(function(file) {
	if (fs.statSync(dir + file).isDirectory()) {
	filelist = walkSync(dir + file + '/', filelist);
	}
	else {

	//http://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid-in-javascript
	Math.random().toString(36).substring(2, 15) + Math.random().toString(36).substring(2, 15);