zhengjia

=Navigating=
    visit('/projects')
    visit(post_comments_path(post))

=Clicking links and buttons=
    click_link('id-of-link')
    click_link('Link Text')
    click_button('Save')
    click('Link Text') # Click either a link or a button
    click('Button Value')

rogercampos

after "deploy:stop", "clockwork:stop"
after "deploy:start", "clockwork:start"
after "deploy:restart", "clockwork:restart"

namespace :clockwork do
  desc "Stop clockwork"
  task :stop, :roles => clockwork_roles, :on_error => :continue, :on_no_matching_servers => :continue do
    run "if [ -d #{current_path} ] && [ -f #{pid_file} ]; then cd #{current_path} && kill -INT `cat #{pid
_file}` ; fi"
  end

ashrithr

Introduction to Kafka

Kafka acts as a kind of write-ahead log (WAL) that records messages to a persistent store (disk) and allows subscribers to read and apply these changes to their own stores in a system appropriate time-frame.

Terminology:

• Producers send messages to brokers
• Consumers read messages from brokers
• Messages are sent to a topic

ewherrmann

require 'resque/tasks'

namespace :resque do
  def del(key)
    Resque.redis.keys(key).each { |k| Resque.redis.del(k) }
  end

  desc "Resque setup according to installation guide"
  task :setup => :environment

TheRayTracer

import struct
import spidev
import sys
import time
import random
import RPi.GPIO as gpio

ascii = [
    [ 0x55, 0x00, 0x55, 0x00, 0x55 ],
    [ 0x55, 0x00, 0x55, 0x00, 0x55 ],

aymkx

require 'securerandom'
require 'matrix'

module RSA
    module Calculator
        def self.powmod(base, exp, mod)
            return 1 if exp == 0
            exp.bit_length.times.inject(1) do |buf, i|
                (buf ** 2) * (base ** exp[exp.bit_length - 1 - i]) % mod
            end