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function byteToHexString(uint8arr) {
  if (!uint8arr) {
    return '';
  }
  
  var hexStr = '';
  for (var i = 0; i < uint8arr.length; i++) {
    var hex = (uint8arr[i] & 0xff).toString(16);
    hex = (hex.length === 1) ? '0' + hex : hex;
    hexStr += hex;

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1xx Informational

100 Continue                          :continue
101 Switching Protocols               :switching_protocols
102 Processing                        :processing
 
2xx Success

200 OK                                :ok

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### Install OpenJDK
cd ~
sudo apt-get update
sudo apt-get install openjdk-7-jre-headless -y

### Download and Install ElasticSearch
### Check http://www.elasticsearch.org/download/ for latest version of ElasticSearch and replace wget link below
wget https://download.elasticsearch.org/elasticsearch/elasticsearch/elasticsearch-1.3.1.deb
sudo dpkg -i elasticsearch-1.3.1.deb

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# Fork of MessageVerifier from Rails 3.2.3
# https://raw.github.com/rails/rails/f3e1b21ca91afbd97f33d1e51808dd320d82b4de/activesupport/lib/active_support/message_verifier.rb
# Author: Jeff Yip (jeffyip)
# This should work with Rails 3.0 - Rails 3.2

require 'active_support/base64'
require 'active_support/deprecation'
require 'active_support/core_ext/object/blank'

module ActiveSupport

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alias 和 alias_method 区别 ruby

1

class User

  def full_name

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class ApplicationController < ActionController::Base

  ...
  #Problem:
  #In rails 3.0.1+ it is no longer possible to do this anymore;
  #  rescue_from ActionController::RoutingError, :with => :render_not_found
  #
  #The ActionController::RoutingError thrown is not caught by rescue_from.
  #The alternative is to to set a catch-all route to catch all unmatched routes and send them to a method which renders an error
  #As in http://techoctave.com/c7/posts/36-rails-3-0-rescue-from-routing-error-solution

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In August 2007 a hacker found a way to expose the PHP source code on facebook.com. He retrieved two files and then emailed them to me, and I wrote about the issue:

http://techcrunch.com/2007/08/11/facebook-source-code-leaked/

It became a big deal:

http://www.techmeme.com/070812/p1#a070812p1

The two files are index.php (the homepage) and search.php (the search page)

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class Dragon; end

# 使用 def 定義 class method
Dragon.instance_eval do
  def foo
    puts "bar"
  end
end
Dragon.foo # bar

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; Comments start with semicolons.

; Clojure is written in "forms", which are just
; lists of things inside parentheses, separated by whitespace.
;
; The clojure reader  assumes that the first thing is a
; function or macro to call, and the rest are arguments.
;
; Here's a function that sets the current namespace:
(ns test)

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Implement Routing for Subdomains

Rails 3.0 introduced support for routing constrained by subdomains.

A subdomain can be specified explicitly, like this:

match '/' => 'home#index', :constraints => { :subdomain => 'www' }