Miguel Hernández Madh93

Note: This is an older post that I did back when I thought I might have time to be a blogger. Oh I was oh so wrong. However, it has proven useful for some folks on stackoverflow. Thus I'm keeping it alive here on Gist.

One of my past projects dealt heavily with an open source Apple technology called HTTP Live Streaming. It’s an HTTP based streaming protocol that at its most fundamental level provides a way to stream video and audio from just about any server with nothing but a few free software tools provided by Apple**. However, it has a few additional features that I think make it a really exciting tool. Yet, I haven’t seen HTTP Live Streaming used very much. This is probably mainly due to the combination of a lack of good/clear documentation, and Apple’s Live Streaming Developer Tools being command line based also make the barrier to entry higher than many developers want to deal with.

The hope is to share my understanding of how to use this technology to:

Rails naming conventions

General Ruby conventions

Class names are CamelCase.

Methods and variables are snake_case.

Methods with a ? suffix will return a boolean.

Set up a VPN Server (PPTP) on AWS

Create a EC2 instance using Ubuntu 14.04.
In Secure Group Inbound Rules, add a SSH Rule(TCP, Port 22, 0.0.0.0/0) and a Custom TCP Rule(TCP, Port 1723, 0.0.0.0/0).
Optional: Associate a Elastic IP with the instance.
SSH into the instance.
sudo apt-get install pptpd.
sudo vim /etc/pptpd.conf. Uncomment localip 192.168.0.1 and remoteip 192.168.0.234-238,192.168.0.245.
sudo vim /etc/ppp/pptpd-options. Uncomment ms-dns and ms-wins. Change the IP to Google's DNS like this:

A Primer on Ruby Method Lookup

Method lookup is a simple affair in most languages without multiple inheritance. You start from the receiver and move up the ancestors chain until you locate the method. Because Ruby allows you to mix in modules and extend singleton classes at runtime, this is an entirely different affair.

I will not build contrived code to exemplify the more complicated aspects of Ruby method lookup, as this will only serve to confuse the matter.

When you pass a message to an object, here is how Ruby finds what method to call:

1. Look within singleton class

NOTE: This is a question I found on StackOverflow which I’ve archived here, because the answer is so effing phenomenal.

Q: How can I make a chain of function decorators in Python?

If you are not into long explanations, see [Paolo Bergantino’s answer][2].

Dynamic Dispatch
Dynamic Method
Ghost Methods
Dynamic Proxies
Blank Slate
Kernel Method
Flattening the Scope (aka Nested Lexical Scopes)
Context Probe
Class Eval (not really a 'spell' more just a demonstration of its usage)
Class Macros

Here is a high level overview for what you need to do to get most of an Android environment setup and maintained.

Prerequisites (for Homebrew at a minimum, lots of other tools need these too):

XCode is installed (via the App Store)
XCode command line tools are installed (xcode-select --install will prompt up a dialog)
Java

Install Homebrew:

ruby -e "$(curl -fsSL https://raw.github.com/Homebrew/homebrew/go/install)"

	Download Google Drive files with WGET

	Example Google Drive download link:

	https://docs.google.com/open?id=[ID]
	To download the file with WGET you need to use this link:

	https://googledrive.com/host/[ID]

	Example WGET command:

	# Non-interactive command-line equivalents to raspi-config
	# These are not guaranteed to work under all circumstances.
	# I use them in a fabric script to do unattended setup of a
	# Raspberry Pi immediately after having booted up a NOOBS
	# and installed Raspbian.
	#
	# 1. Install NOOBS
	# 2. When the config screen comes up, hit TAB TAB RETURN to exit from it
	# 3. Type 'sudo service ssh start' at the command line (no quotes).
	# 4. (Optional) copy a public key to the pi account on the pi.

	#!/bin/bash
	# This script will help you setup Docker for TLS authentication.
	# Run it passing in the arguement for the FQDN of your docker server
	#
	# For example:
	# ./create-docker-tls.sh myhost.docker.com
	#
	# The script will also create a profile.d (if it exists) entry
	# which configures your docker client to use TLS
	#