mikhailov

# app/controllers/posts_controller.rb
class PostsController < ApplicationController
  def index
    @posts.all_cached # Retrive only at once by every 5 minutes
    expires_in 5.minutes, :private => false, :public => true
  end
end

# app/models/post.rb
Class Post

SebastianEdwards

# Gemfile
gem "therubyracer-heroku"

# config/initializers/barista_config.rb
Barista.configure do |c|
  c.root = Rails.root.join("app", "coffeescripts")
  c.output_root = Rails.root.join("tmp", "javascripts")
end

require 'fileutils'

vinioliveira

$ sudo adduser --system --no-create-home --disabled-login --disabled-password --group juggernaut
$ sudo mv ~/juggernaut2-for-init.d-startup.sh /etc/init.d/juggernaut
$ sudo chmod +x /etc/init.d/juggernaut
$ sudo update-rc.d -f juggernaut defaults

J-Gull

#The steps need to be performed to use resque-web with in your application

#In routes.rb

ApplicationName::Application.routes.draw do
  resources :some_controller_name
  mount Resque::Server, :at=> "/resque"
end

#That's it now you can access it from within your application i.e

zumbojo

# Simple bijective function
#   Basically encodes any integer into a base(n) string,
#     where n is ALPHABET.length.
#   Based on pseudocode from http://stackoverflow.com/questions/742013/how-to-code-a-url-shortener/742047#742047

ALPHABET =
  "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789".split(//)
  # make your own alphabet using:
  # (('a'..'z').to_a + ('A'..'Z').to_a + (0..9).to_a).shuffle.join

jcasimir

Sessions and Conversations

HTTP is a stateless protocol. Sessions allow us to chain multiple requests together into a conversation between client and server.

Sessions should be an option of last resort. If there's no where else that the data can possibly go to achieve the desired functionality, only then should it be stored in the session. Sessions can be vulnerable to security threats from third parties, malicious users, and can cause scaling problems.

That doesn't mean we can't use sessions, but we should only use them where necessary.

Adding, Accessing, and Removing Data

ajokela

require "imgscalr-lib" # https://github.com/thebuzzmedia/imgscalr
require "jruby"
java_import "javax.imageio.ImageIO"

ImageIO.write(
  com.thebuzzmedia.imgscalr.Scalr.resize(
    ImageIO.read(java.io.File.new("iss.jpg")), 
    250), 
  "jpg", 
  java.io.File.new("iss_new.jpg"))

norman

#!/usr/bin/env ruby
=begin

= Geographic Searches With Postgres's Earthdistance and Cube Extensions

This program shows how to easily create a Postgres database that uses the Cube
and Earthdistance extensions to perform fast queries on geographic data.

Briefly, the problem this code solves is "show me all places within 50
kilometers of New York City."

ThomasBurleson

/**
 * @license AngularJS
 * (c) 2010-2012 AngularJS http://angularjs.org
 * License: MIT
 */

/**
 * Backward compatibility module for AngularJS
 * @author Vojta Jina <vojta.jina@gmail.com>
 *

ahoward

# the worlds lightest weight presenter pattern.  to use simply
#
# file app/presenters/post_presenter.rb
#
# PostPresenter =
#   Presenter.for(Post) do
#     validates_presence_of :custom_field_for_this_form
#
#   end
#