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var Mutex = function() {
  this.queues = [];
  this.locked = false;
};

Mutex.prototype = {
  push: function(callback) {
    var self = this;
    this.queues.push(callback);
    if (!this.locked) {

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module Reportable
  extend ActiveSupport::Concern

  module ClassMethods
    # Chain on a scope and specify the fields to extract.
    # Example:
    #   User.enabled.report %{
    #     :email_opt_in,
    #     'created_at as sign_up_date'
    #   }

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Throughout this article, I will use Java's Object-Oriented Programming terminologies such as static, private and public.

Pattern 1: Self-construction

This pattern exploits scoping to allow for private and public fields and methods. It is named as Self-construction because the class function (or constructor) has to assign instance methods one by one.

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TODO: make gem for this

This was tested using Rails 3.2 and Rails 4.0 on Ruby 2.0.0.

Bower

1. Set the install directory for Bower components:

// .bowerrc

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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written, the development of the Promises/A+ specification has made the original emphasis on Promises/A seem somewhat outdated.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.

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// Promise.all is good for executing many promises at once
Promise.all([
  promise1,
  promise2
]);

// Promise.resolve is good for wrapping synchronous code
Promise.resolve().then(function () {
  if (somethingIsNotRight()) {
    throw new Error("I will be rejected asynchronously!");

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/* bling.js */

window.$ = document.querySelectorAll.bind(document)

Node.prototype.on = window.on = function (name, fn) {
  this.addEventListener(name, fn)
}

NodeList.prototype.__proto__ = Array.prototype

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#!/bin/sh
#
# Amazon EC2 user-data file for automatic configuration of IPsec/L2TP VPN server
# on a Ubuntu or Debian instance. Tested with Ubuntu 14.04 & 12.04 and Debian 8 & 7.
# With minor modifications, this script *can also be used* on dedicated servers
# or any KVM- or XEN-based Virtual Private Server (VPS) from other providers.
#
# DO NOT RUN THIS SCRIPT ON YOUR PC OR MAC! THIS IS MEANT TO BE RUN WHEN 
# YOUR AMAZON EC2 INSTANCE STARTS!
#

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NEWHOSTNAME=$1
ROOTPASSWD=$2

# Keymap
loadkeys jp106

# Setup HDD
parted /dev/sda mklabel gpt
parted /dev/sda mkpart primary btrfs 1049KB 8591MB
parted /dev/sda mkpart primary linux-swap 8591MB 10.7GB

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Client-side SSL

For excessively paranoid client authentication.

Using self-signed certificate.

Create a Certificate Authority root (which represents this server)

Organization & Common Name: Some human identifier for this server CA.

openssl genrsa -des3 -out ca.key 4096
openssl req -new -x509 -days 365 -key ca.key -out ca.crt