Stoyan Zhekov zh

Setting up and installing rbenv, ruby-build, rubies, rbenv-gemset, and bundler

This guide enables you to install (ruby-build) and use (rbenv) multiple versions of ruby, isolate project gems (gemsets and/or bundler), and automatically use appropriate combinations of rubies and gems.

TL;DR Demo

# Ensure system is in ship-shape.

aptitude install git zsh libssl-dev zlib1g-dev libreadline-dev libyaml-dev

Introduction

The MCP23017 is an I/O expander chip. It has 16 GPIO pins which you can control using an I2C interface using two pins from a Raspberry Pi, plus a power source and sink (which can also come from the Pi). It's not quite as simple as directly controlling the Pi's GPIO pins, but it's not complicated, either.

You need to install i2c-tools, which is probably in your distribution's package manager. You also need a kernel with I2C support; you might need to modprobe i2c-dev. It would presumably be possible to do without either of these things, and bitbang the I2C protocol over GPIO, but I don't understand the protocol well enough to try.

On pin numbering: if you like, you can refer to the datasheet for the MCP23017. There's a small dot in one corner of the chip, with a semi-circular cut-out at that end. The pin near

	#!/usr/bin/env ruby
	# mio -- minimalist language inspired by Io for your own careful
	# and private delectation w/ friends of the the family,
	# if you want to.
	# usage:
	# mio # starts the REPL
	# mio mio_on_rails.mio
	# (c) macournoyer
	module Mio
	class Error < RuntimeError

	# Simple, scrappy UDP DNS server in Ruby (with protocol annotations)
	# By Peter Cooper
	#
	# MIT license
	#
	# * Not advised to use in your production environment! ;-)
	# * Requires Ruby 1.9
	# * Supports A and CNAME records
	# * See http://www.ietf.org/rfc/rfc1035.txt for protocol guidance
	# * All records get the same TTL

	# -- coding: utf-8 --
	# GEPUB::Builder example.
	require 'ruby gem'
	require 'gepub'

	builder = GEPUB::Builder.new {
	# In the root block, you can define metadata.
	# You can define title, creator(s), contributor(s), publisher(s), date, unique_identifier, identifier, language.
	# Title can be specified with title, subtitle, collection, short_title, expanded_title, edition.
	# You can also define description, format, relation, right, source, subject, type.

	source "https://rubygems.org"

	gem 'sprockets'
	gem 'sprockets-sass'
	gem 'sass'
	gem 'compass'
	gem 'bootstrap-sass'
	gem 'handlebars_assets'
	gem 'coffee-script'

	#!/usr/bin/env ruby

	# This is a basic deploy script for Heroku apps.
	# It provides a structure you can use to expand on
	# and add your own prereqs and deploy tasks.
	#
	# It basically ensures that:
	# 1. There are no uncommited files
	# 2. You can ssh to github
	# 3. You can connect to heroku

	#!/usr/bin/env sh

	##
	# This is script with usefull tips taken from:
	# https://github.com/mathiasbynens/dotfiles/blob/master/.osx
	#
	# install it:
	# curl -sL https://raw.github.com/gist/2108403/hack.sh \| sh
	#

	#!/usr/bin/env python
	# encoding: utf-8
	"""
	movie_recommender.py

	Created by Thomas Cabrol on 2012-04-06.
	Copyright (c) 2012 __MyCompanyName__. All rights reserved.
	"""

	import csv

	{_} = require 'underscore'
	child_process = require 'child_process'
	async = require 'async'

	healthCheckInterval = 60 * 1000
	bounceInterval = 60 * 1000
	bounceWait = bounceInterval + 30 * 1000

	delayTimeout = (ms, func) -> setTimeout func, ms
	class MonitoredChild