Alberto Negron Altons

Vagrant Setup

This tutorial guides you through creating your first Vagrant project.

We start with a generic Ubuntu VM, and use the Chef provisioning tool to:

install packages for vim, git
create user accounts, as specified in included JSON config files
install specified user dotfiles (.bashrc, .vimrc, etc) from a git repository

Afterwards, we'll see how easy it is to package our newly provisioned VM

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

Homebrew

How To

Homebrew is a package management system for OS X. You can read more about it here, or simply run

ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

to install it.

Rails Models

Generating models

$ rails g model User

Associations

belongs_to

has_one

	# Basic Twitter Analysis
	# analyze and compare tweets for a defined set of hash and @ tags
	# base code from "Data Science with R", a book for an introductory course from Syracuse, as per http://blog.revolutionanalytics.com/2013/02/free-e-book-on-data-science-with-r.html

	# load the required packages:
	require("bitops")
	require("RCurl")
	require("RJSONIO")
	require("twitteR")
	require("ROAuth")

	#!/bin/sh

	# Alot of these configs have been taken from the various places
	# on the web, most from here
	# https://github.com/mathiasbynens/dotfiles/blob/master/.osx

	# Set the colours you can use
	black='\033[0;30m'
	white='\033[0;37m'
	red='\033[0;31m'

	# ---------------------------------------------------------------------------
	#
	# Description: This file holds all my BASH configurations and aliases
	#
	# Sections:
	# 1. Environment Configuration
	# 2. Make Terminal Better (remapping defaults and adding functionality)
	# 3. File and Folder Management
	# 4. Searching
	# 5. Process Management

	#!/bin/bash

	# --------------------------------------------------------------------------------------------
	# Installs Ruby 2.5 using rbenv/ruby-build on the Raspberry Pi (Raspbian)
	#
	# Run from the web:
	# bash <(curl -s https://gist.githubusercontent.com/blacktm/8302741/raw/install_ruby_rpi.sh)
	# --------------------------------------------------------------------------------------------

	# Welcome message

	ActiveRecord cheat sheet / EXAMPLES

	INSTALL
	=======
	$ gem install activerecord
	in GEMFILE: gem ‘activerecord’

	REQUIRE
	=======
	require ‘active_record’

	# Usage:
	#
	# class MyClass < ActiveRecord::Base
	# ...
	# validate :postal_code, spanish_postal_code: true # default message
	# validate :postal_code, spanish_postal_code: { message: '<Your message>' } # custom message
	# ...
	# end
	#
	class SpanishPostalCodeValidator < ActiveModel::EachValidator