| import sys | |
| # choose() is the same as computing the number of combinations. Normally this is | |
| # equal to: | |
| # | |
| # factorial(N) / (factorial(m) * factorial(N - m)) | |
| # | |
| # but this is very slow to run and requires a deep stack (without tail | |
| # recursion). | |
| # |
A curated list of AWS resources to prepare for the AWS Certifications
A curated list of awesome AWS resources you need to prepare for the all 5 AWS Certifications. This gist will include: open source repos, blogs & blogposts, ebooks, PDF, whitepapers, video courses, free lecture, slides, sample test and many other resources.
Let's use Terraform to easily get a CoreOS cluster up on Digital Ocean. In this example we will get a 5 node CoreOS cluster up and running on the Digital Ocean 8GB size.
Grab a copy of Terraform for your platform from http://www.terraform.io/downloads.html. Follow the instructions at http://www.terraform.io/intro/getting-started/install.html by getting Terraform in your PATH and testing that it works.
| require 'rubygems' | |
| require 'eventmachine' | |
| require 'em-websocket' | |
| require 'json' | |
| class Connection | |
| attr_accessor :socket, :user_id | |
| def initialize(socket, user_id) | |
| @socket = socket |
