camertron

#!/bin/env ruby

# lazy hack from Robert Klemme

module Memory
  # sizes are guessed, I was too lazy to look
  # them up and then they are also platform
  # dependent
  REF_SIZE = 4 # ?
  OBJ_OVERHEAD = 4 # ?

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

guyboltonking

require 'action_dispatch/middleware/static'

module Middleware
  class FileHandler < ActionDispatch::FileHandler
    def initialize(root, assets_path, cache_control)
      @assets_path = assets_path.chomp('/') + '/'
      super(root, cache_control)
    end

    def match?(path)

ocean90

Tutorial for compiling the Compass.app (http://compass.handlino.com/)
=====================================================================

Java installed?
	java -version
	
Load jRuby (for example JRuby 1.6.5.1 Binary .zip)
	http://jruby.org/download
	
Unzip jRuby to `/usr/local/`

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')

bcalloway

### /config/environment.rb
config.gem 'fastercsv'

### /config/routes.rb
map.connect '/users/export', :controller => 'users', :action => 'export'

### /app/models/user.rb
# find all students and pass to controller export action for export to csv
def self.find_students
  find_by_sql("select students.firstname, students.lastname, students.grade, students.homeroom, students.phone, students.email, students.relationship, users.firstname, users.lastname, accounts.school from students, users, accounts where students.user_id = users.id and accounts.id = users.account_id")