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function guidGenerator() {
    var S4 = function() {
       return (((1+Math.random())*0x10000)|0).toString(16).substring(1);
    };
    return (S4()+S4()+"-"+S4()+"-"+S4()+"-"+S4()+"-"+S4()+S4()+S4());
}

// How to use it:

guidGenerator();

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#!/usr/bin/env sh

##
# This is script with usefull tips taken from:
#   https://github.com/mathiasbynens/dotfiles/blob/master/.osx
#
# install it:
#   curl -sL https://raw.github.com/gist/2108403/hack.sh | sh
#

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class ActionDispatch::Routing::Mapper
  def draw(routes_name)
    instance_eval(File.read(Rails.root.join("config/routes/#{routes_name}.rb")))
  end
end

BCX::Application.routes.draw do
  draw :api
  draw :account
  draw :session

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  var user = {
    validateCredentials: function (username, password) {
      return (
          (!(username += '') || username === '') ? { error: "No Username Given.", field: 'name' }
        : (!(username += '') || password === '') ? { error: "No Password Given.", field: 'pass' }
        : (username.length < 3)                  ? { error: "Username is less than 3 Characters.", field: 'name' }
        : (password.length < 4)                  ? { error: "Password is less than 4 Characters.", field: 'pass' }
        : (!/^([a-z0-9-_]+)$/i.test(username))   ? { error: "Username contains invalid characters.", field: 'name' }
        : false
      );

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require 'open-uri'

class Story
  attr_accessor :title, :url
  
  def initialize(title, url)
    @title = title
    @url = url
  end
  

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# config/initializers/redcarpet.rb
module ActionView
  module Template::Handlers
    class Markdown
      class_attribute :default_format
      self.default_format = Mime::HTML

      def call(template)
        markdown = Redcarpet::Markdown.new(Redcarpet::Render::HTML, :autolink => true, :space_after_headers => true)
        markdown.render(template.source).html_safe.inspect

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#get the attribute from a given url (image) by using OCR
  def ocr_attribute url
    dir = "/tmp/scrapers"
    file = rand(36**10).to_s(36)
    path = "#{dir}/#{file}"
    pnm_path = "#{dir}/#{file}.pnm"
    open(url) do |f|
      Dir.mkdir(dir) if !File.exists? dir
      image = Image.from_blob(f.read)[0]
      image.write(path)

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[
  // Make paste-and-indent the default paste behavior
  { "keys": ["super+v"], "command": "paste_and_indent" },
  { "keys": ["super+shift+v"], "command": "paste" }
]

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Get Mountain Lion and Homebrew to Be Happy

1) Install XCode 4.4 into /Applications

Get it from the App Store.

2) Install Command Line Tools

In XCode's Preferences > Downloads you can install command line tools.

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Sublime Text 2 – Useful Shortcuts (Mac OS X)

General

⌘T	go to file
⌘⌃P	go to project
⌘R	go to methods
⌃G	go to line
⌘KB	toggle side bar
⌘⇧P	command prompt