Maher Saif MaherSaif

Continued from Results from the January 2012 Core Skills Course, by Gregory Brown

For our integration exercise we had students build multi-user email based applications. All ten students who completed the course worked on this exercise, and we ended up with everything from an email-based wiki to a system for sharing funny stories and jokes.

For our academic exercise, we asked students to make use of Markov Chains to do something interested. Seven of our students participated in this exercise, and we ended up all sorts of cool results, including a jazz chart generator and a tool which predicts movements in currency exchange rates.

For our [modeling e

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

	# add this to your spec helper
	RSpec.configure do \|config\|
	config.treat_symbols_as_metadata_keys_with_true_values = true
	config.filter_run :focus => true
	config.run_all_when_everything_filtered = true
	end

	# and then use the :focus tag in your specs

	it "does something awesome", :focus do

	# S3 backend for paperclip plugin. Copy the file to:
	# +config/initializers/+ directory
	#
	# Example configuration for CNAME bucket:
	#
	# has_attached_file :image,
	# :s3_host_alias => "bucket.domain.tld",
	# :s3_headers => { :cache_control => 10.years.from_now.httpdate },
	# :url => ":s3_alias_url",
	# :styles => {

	namespace :deploy do
	namespace :assets do
	task :precompile, :roles => :web, :except => { :no_release => true } do
	from = source.next_revision(current_revision)
	if capture("cd #{latest_release} && #{source.local.log(from)} vendor/assets/ app/assets/ \| wc -l").to_i > 0
	run %Q{cd #{latest_release} && #{rake} RAILS_ENV=#{rails_env} #{asset_env} assets:precompile}
	else
	logger.info "Skipping asset pre-compilation because there were no asset changes"
	end
	end

	# app/controllers/posts_controller.rb
	class PostsController < ApplicationController
	def index
	@posts.all_cached # Retrive only at once by every 5 minutes
	expires_in 5.minutes, :private => false, :public => true
	end
	end

	# app/models/post.rb
	Class Post

	# you have ctags but it does not work...
	$ ctags -R --exclude=.git --exclude=log *
	ctags: illegal option -- R
	usage: ctags [-BFadtuwvx] [-f tagsfile] file ...

	#you need to get new ctags, i recommend homebrew but anything will work
	$ brew install ctags

	#alias ctags if you used homebrew
	$ alias ctags="`brew --prefix`/bin/ctags"

	<!-- to be saved at /usr/share/nginx/html/404.html -->
	<html lang="en"><head><meta charset="utf-8">
	<meta name="viewport" content="initial-scale=1, minimum-scale=1, width=device-width">
	<title>Error 404 (Not Found)!!1</title>
	<style>
	{margin:0;padding:0}html,code{font:15px/22px arial,sans-serif}html{background:#fff;color:#222;padding:15px}body{margin:7% auto 0;max-width:390px;min-height:180px;padding:30px 0 15px} > body{background:url(//www.google.com/images/errors/robot.png) 100% 5px no-repeat;padding-right:205px}p{margin:11px 0 22px;overflow:hidden}ins{color:#777;text-decoration:none}a img{border:0}@media screen and (max-width:772px){body{background:none;margin-top:0;max-width:none;padding-right:0}}
	</style>
	<link type="text/css" rel="stylesheet" href="chrome-extension://cpngackimfmofbokmjmljamhdncknpmg/style.css"><script type="text/javascript" charset="utf-8" src="chrome-extension://cpngackimfmofbokmjmljamhdncknpmg/page_context.js"></script></head><body screen_capture_injected="true">

	<!--

	{ "keys": ["home"], "command": "move_to", "args": {"to": "bol"} },
	{ "keys": ["end"], "command": "move_to", "args": {"to": "eol"} }

	class ActionDispatch::Routing::Mapper
	def draw(routes_name)
	instance_eval(File.read(Rails.root.join("config/routes/#{routes_name}.rb")))
	end
	end

	BCX::Application.routes.draw do
	draw :api
	draw :account
	draw :session