slayer

Ruby
  принципиальное различие скриптовых и “обычных” языков
  3 принципа ООП
  реализация множественного наследования в ruby
  duck typing
  многопоточность в ruby
Rails
  что такое MVC и зачем это нужно
  локига в контроллере, должна ли быть и почему
  синхронные и асинхронные операции — предложить варианты решения

slayer

ruby-1.9.3-p448 cumulative performance patch for rbenv

(I guarantee nothing. No warranty I am not responsible blah blah blah. Seems to work great for me so far. Thanks to Tyler Bird who I forked this from.)

This installs a patched ruby 1.9.3-p448 with the railsexpress patchsets: https://github.com/skaes/rvm-patchsets

Requirements

• rbenv
• ruby-build

slayer

# export CFLAGS="-O2 -fno-tree-dce -fno-optimize-sibling-calls"
export CC=/usr/bin/gcc-4.4

require_gcc                                                                                                                                                                                                                                         
build_package_disable_ssl2_tcmalloc() {                                                                                                                                                                                                             
  wget 'https://raw.github.com/gist/3767526/9f20aba9f0d8d232d08e14e754e620758330a8eb/gistfile1.diff'                                                                                                                                                
  patch -p1 < gistfile1.diff                                                                                                                                                                         

slayer

require 'rubygems'
require 'eventmachine'

module Console
  PROMPT = "\n>> ".freeze

  def post_init
    send_data PROMPT
    send_data "\0"
  end

slayer

# Update, upgrade and install development tools:
apt-get update
apt-get -y upgrade
apt-get -y install build-essential
apt-get -y install git-core

# Install rbenv
git clone git://github.com/sstephenson/rbenv.git /opt/rbenv

# Add rbenv to the path:

slayer

# The problem: In your Rails 3 project, you have a model Request that models a
# user's request for content related to a specific problem or topic. The user 
# can tag her request with any number of words. These are modeled by a Tag class
# backed by a tags DB table. Since you want unique records per tag, you have a 
# Tagging class backed by a taggings table. Taggings is a a many-to-many table
# with some additional information. Also, other models in the application 
# besides requests can be tagged: The Tagging class defines a polymorphic 
# relationship "taggable" with those models.
#
# So pretty soon you want to look up all the requests that are tagged with

slayer

# If your workers are inactive for a long period of time, they'll lose
# their MySQL connection.
#
# This hack ensures we re-connect whenever a connection is
# lost. Because, really. why not?
#
# Stick this in RAILS_ROOT/config/initializers/connection_fix.rb (or somewhere similar)
#
# From:
#   http://coderrr.wordpress.com/2009/01/08/activerecord-threading-issues-and-resolutions/

slayer

#!/usr/bin/env ruby
# -*- ruby -*-
require 'rubygems'
require 'daemon-spawn'

RAILS_ROOT = File.expand_path(File.join(File.dirname(__FILE__), '..'))

class DelayedJobWorker < DaemonSpawn::Base
  def start(args)
    ENV['RAILS_ENV'] ||= args.first || 'development'

slayer

#!/usr/bin/env ruby

require 'rubygems'
#require 'map_by_method' rescue nil
require 'pp'

# Enable tab-completion.
require 'irb/completion' rescue nil

# Enable prompt-less prompts

slayer

#!/usr/bin/env ruby

require File.dirname(__FILE__) + "/../../config/environment"

$running = true
$working = false

Signal.trap("TERM") do
  $stderr.puts "#{Time.now.to_s(:db)}\tGot TERM, exiting..."
  $running = false