sarogers

require 'thread'

class Foo
  @@count = 0

  def self.increment
    @@count += 1
  end

  def self.count

sarogers

class Student
  has_many :tracks
  has_many :assignments, through: :tracks, class_name: 'Assessment'
end

sarogers

Abstraction Suggestions

Summary: use good/established messaging patterns like Enterprise Integration Patterns. Don't make up your own. Don't expose transport implementation details to your application.

Broker

As much as possible, I prefer to hide Rabbit's implementation details from my application. In .Net we have a Broker abstraction that can communicate through a lot of different transports (rabbit just happens to be our preferred one). The broker allows us to expose a very simple API which is basically:

• publish
• request
• start/stop subscription

sarogers

*filter

#  Allow all loopback (lo0) traffic and drop all traffic to 127/8 that doesn't use lo0
-A INPUT -i lo -j ACCEPT
-A INPUT -d 127.0.0.0/8 -j REJECT

#  Accept all established inbound connections
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT

#  Allow all outbound traffic - you can modify this to only allow certain traffic

sarogers

#!/bin/sh
/sbin/iptables-restore < /etc/iptables.firewall.rules

sarogers

#==============================================================================
# Resources
#==============================================================================
#
# Math and Logic - http://www.tutorialspoint.com/ruby/ruby_operators.htm
#
# Flow control:
#  if/else - http://www.codecademy.com/glossary/ruby/if-unless-elsif-and-else
#  looping - http://ruby.bastardsbook.com/chapters/loops/
#

sarogers

#!/usr/bin/env ruby
require 'set'

class Node
  attr_accessor :email, :neighbors

  def initialize(email)
    @email = email
    @neighbors = Set.new
  end

sarogers

# http://www.programcreek.com/2013/12/leetcode-solution-of-longest-palindromic-substring-java/

require 'rspec'

def dynamic_lps(str)
  return nil unless str.is_a?(String)
  return str if str.length <= 1

  longest_palindrome = ''
  memo = Array.new(str.length) { Array.new(str.length) }

sarogers

traceroute to digitalocean.com (141.101.115.8), 64 hops max, 52 byte packets
 1  l100.nycmny-vfttp-226.verizon-gni.net (173.56.121.1)  4.101 ms  4.699 ms  2.971 ms
 2  g1-1-3-3.nycmny-lcr-22.verizon-gni.net (130.81.180.4)  10.167 ms  11.152 ms  11.700 ms
 3  ae4-0.ny5030-bb-rtr1.verizon-gni.net (130.81.163.224)  30.231 ms *
    ae0-0.ny5030-bb-rtr1.verizon-gni.net (130.81.209.118)  39.039 ms
 4  * 0.xe-3-2-0.il2.nyc9.alter.net (152.63.26.93)  7.402 ms
    3.et-2-0-1.tl2.nyc1.alter.net (140.222.227.34)  7.501 ms
 5  2.ae1.xt1.nyc4.alter.net (140.222.228.119)  31.797 ms
    0.ae2.xl4.ewr6.alter.net (140.222.228.45)  49.313 ms
    2.ae0.xt2.nyc4.alter.net (140.222.227.27)  96.378 ms

sarogers

# NOTE: All model inheriting this method must implement a #publish! method.
module Publishable
  def publish_to!(batch)
    publish_parents!(batch)
    publish_children!(batch)
  end

  def publish!
    raise 'implement publish! on the inheriting class'
  end