class Array
 
  def all_true?(&block)
    t_ref = true  
 
    if block_given?
      self.each do |_val_|
        t_ref &= !!(yield(_val_))
      end
    else
      self.each do |_val_|
        t_ref &= !!(_val_)
      end
    end
 
    t_ref
  end
 
end

[ true, true, true ].all_true?  #=> true
[ true, true, false ].all_true?  #=> false
 
# Want to run some other non boolean logic on it?
[ 1, 2, 3, 4, 5].all_true?{ |val| val.integer? } #=> true
[ 1, 'a', 3, 4, 6].all_true?{ |val| val.integer? } #=> false

# Ruby 1.8
irb(main):006:0> Date.today.strftime("%b %e, %Y")
=> "May 7, 2010"

irb(main):007:0> Date.today.strftime("%b %e, %Y")
=> "May  7, 2010" # TWO SPACES

"May  7, 2010"
"May 7, 2010"

Date.today.strftime("%b%e, %Y")

  configure do
    register SassInitializer #The Rack Sass reloader...
 
    Compass.configuration do |config|
      config.project_path = File.dirname(__FILE__)
      config.sass_dir = "stylesheets"
      config.project_type = :stand_alone
      config.http_path = "/"
      config.css_dir = "stylesheets"
      config.images_dir = "images"
      config.output_style = :compressed
    end
  end   
  get '/stylesheets/:file.css' do
    content_type 'text/css', :charset => 'utf-8'
    # This is the doc on how to give Sass some more load paths to find the compass  files. 
    #   it doesnt work :P and for that matter, neither does:
    # sass :file, Compass.sass_engine_options
    # or the set :sass, whatever_hash_here
    sass :file, :sass => Compass.sass_engine_options
  end

  configure do
    register SassInitializer
 
    Compass.configuration do |config|
      config.project_path = File.dirname(__FILE__)
      config.sass_dir = "stylesheets"
      config.project_type = :stand_alone
      config.http_path = "/"
      config.css_dir = "stylesheets"
      config.images_dir = "images"
      config.output_style = :compressed
    end
 
    Sass::Plugin.options.merge!(Compass.sass_engine_options)
  end
 
  get '/stylesheets/:file.css' do
    content_type 'text/css', :charset => 'utf-8'
    sass :file
  end

def import
#...snip
  tempfile = Tempfile.new( my_filename)
  tempfile.write open( image_url ).read
  @imported_user.images.create(:file => tempfile)
#...snip
end

require 'open-uri'
require 'digest/sha1'
 
class RemoteFile < ::Tempfile
 
  def initialize(path, tmpdir = Dir::tmpdir)
    @original_filename  = File.basename(path)
    @remote_path        = path
 
    super Digest::SHA1.hexdigest(path), tmpdir
    fetch
  end
 
  def fetch
    string_io = OpenURI.send(:open, @remote_path)
    self.write string_io.read
    self.rewind
    self
  end
 
  def original_filename
    @original_filename
  end
 
  def content_type
    mime = `file --mime -br #{self.path}`.strip
    mime = mime.gsub(/^.*: */,"")
    mime = mime.gsub(/;.*$/,"")
    mime = mime.gsub(/,.*$/,"")
    mime
  end
end

remote_file = RemoteFile.new("http://www.google.com/intl/en_ALL/images/logo.gif")
remote_file.original_filename #=> logo.gif
remote_file.content_type #= image/gif

def import
  #...snip
  @imported_user.images.create(:file => RemoteFile.new( url_to_image ))
  #...snip
end

<script type="text/javascript" src="http://www.google.com/jsapi?key=INSERT-YOUR-KEY"></script>
<script type="text/javascript">
 google.load("jquery", "1.4.2");
</script>

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>

# Docs: http://code.google.com/apis/ajaxlibs/documentation/index.html
#
class GoogleJsApi
  BaseURL = "http://ajax.googleapis.com/ajax/libs".freeze
 
  Libraries = { 
    "jquery" => {
      :versions => %w(1.2.3 1.2.6 1.3.0 1.3.1 1.3.2 1.4.0 1.4.1 1.4.2),
      :compressed_url => "/jquery/%s/jquery.min.js",
      :uncompressed_url => "/jquery/%s/jquery.js"
    },
    "jqueryui" => {
      :versions => %w(1.5.2 1.5.3 1.6 1.7.0 1.7.1 1.7.2),
      :compressed_url   => "/jqueryui/%s/jquery-ui.min.js",
      :uncompressed_url => "/jqueryui/%s/jquery-ui.js"
    },
    "prototype" => {
      :versions => %w(1.6.0.2 1.6.0.3 1.6.1.0),
      :compressed_url   => "",
      :uncompressed_url => "/prototype/%s/prototype.js"
    },
    "scriptaculous" => {
      :versions => %w(1.8.1 1.8.2 1.8.3),
      :compressed_url   => "",
      :uncompressed_url => "/scriptaculous/%s/scriptaculous.js"
    },
    "mootools" => {
      :versions => %w(1.1.1 1.1.2 1.2.1 1.2.2 1.2.3 1.2.4),
      :compressed_url => "/mootools/%s/mootools-yui-compressed.js",
      :uncompressed_url => "/mootools/%s/mootools.js"
    },
    "dojo" => {
      :versions => %w(1.1.1 1.2.0 1.2.3 1.3.0 1.3.1 1.3.2 1.4.0 1.4.1),
      :compressed_url => "/dojo/%s/dojo/dojo.xd.js",
      :uncompressed_url => "/dojo/%s/dojo/dojo.xd.js.uncompressed.js"
    },
    "swfobject" => {
      :versions => %w(2.1 2.2),
      :compressed_url   => "/swfobject/%s/swfobject.js",
      :uncompressed_url => "/swfobject/%s/swfobject_src.js"
    },
    "yui" => {
      :versions => %w(2.6.0 2.7.0 2.8.0r4),
      :compressed_url   => "/yui/%s/build/yuiloader/yuiloader-min.js",
      :uncompressed_url => "/yui/%s/build/yuiloader/yuiloader.js"
    },
    "ext-core" => {
      :versions => %w(3.0.0 3.1.0),
      :compressed_url   => "/ext-core/%s/ext-core.js",
      :uncompressed_url => "/ext-core/%s/ext-core-debug.js"
    },
    "chrome-frame" => {
      :versions => %w(1.0.0 1.0.1 1.0.2),
      :compressed_url   => "/chrome-frame/%s/CFInstall.min.js",
      :uncompressed_url => "/chrome-frame/%s/CFInstall.js"
    } 
  }.freeze
 
  class << self
    def include(name, version=nil, compressed=true, validate_version=true)
      name = name.to_s
      if lib = GoogleJsApi::Libraries[name]
        version ||= lib[:versions].last
 
        if validate_version && lib[:versions].include?(version)
          GoogleJsApi.url_for(name, version, compressed)
        elsif !validate_version
          GoogleJsApi.url_for(name, version, compressed)
        else
          raise Exception, "Invalid version (#{version}) for #{name}"
        end
      else
        raise Exception, "Unknown Google Javascript Library"
      end
    end
 
    def version_info
      tmp_version = {}
      GoogleJsApi::Libraries.each do |k,v|
        tmp_version[ k ] = v[:versions]
      end
      tmp_version
    end
 
    protected
    def url_for(name, version, compressed)
      GoogleJsApi::BaseURL +
      GoogleJsApi::Libraries[ name ][ compressed ? :compressed_url : :uncompressed_url ] % version
    end
  end
 
end

require 'pp'
 
pp GoogleJsApi.version_info
 
# Include the newest version of a library
puts GoogleJsApi.include('jquery')
 
# Include a specific version of a library
puts GoogleJsApi.include "chrome-frame", "1.0.0"
 
# Include a specific version of a library uncompressed
puts GoogleJsApi.include "chrome-frame", "1.0.0", false
 
# Include a specific version of a library w/o validating the version; useful if this goes out of date :P
puts GoogleJsApi.include "jquery", "NOT_A_VERSION", false, false
 
begin
  puts GoogleJsApi.include :jqueryui, "1.0"
rescue Exception => e
  puts "This should blow up..."
  puts e.message
end

# Rails
require 'google_js_api' #or whatever you named the file when you dropped it in lib
 
# In your application layout or whatever
javascript_include_tag GoogleJsApi.include(:jquery, "1.4.0")

# Merb
require 'google_js_api' #or whatever you named the file when you dropped it in lib
 
#in your application layout or where ever
require_js GoogleJsApi.include(:swfobject)

require 'aws/s3'
 
AWS::S3::Base.establish_connection!(
  :access_key_id     => "YOUR_ACCESS_KEY",
  :secret_access_key => "YOUR_SECRET_KEY"
)
 
include AWS::S3
def s3_set_public_read(key, bucket)
  puts "Processing: #{key}"  
 
  policy = S3Object.acl(key, bucket)
  policy.grants << ACL::Grant.grant(:public_read)
  policy.grants << ACL::Grant.grant(:public_read_acp)
  S3Object.acl(key, bucket, policy)      
end

Rails.cache.write('test_key', 'test_value', :expires_in => 5.minutes)

class StupidController < ApplicationController
  caches_page :whatever, :expires_in => 5.minutes
end

- cache(:action => 'home', :action_suffix => 'advertisements', :expires_in => 10.minutes) do

- cache({:action => 'home', :action_suffix => 'advertisements'}, :expires_in => 10.minutes) do

require 'fileutils'
require 'pathname'
 
namespace :js do
  desc <<-INFO
Output Compressed JavaScript to STDOUT; 
  COMPRESS=ALL to compress all Javascript files that DONT contain ".min." 
INFO
 
  task :yui => :environment do
    targz()
    if ENV['COMPRESS'] == 'ALL'
      Dir[Rails.root.to_s / :public / :javascripts / '**/*.js'].each do |javascript|
        next if javascript =~ /\.min\./
 
        compress(javascript)
      end
    else
      if File.exist?(Rails.root + "config/yui.yml")
        javascripts = YAML.load(File.open("config/yui.yml").read)["javascripts"]
 
        if !javascripts.blank?
          javascripts.each {|script| compress(Rails.root + "public/javascripts" + script)}
        else
          raise Exception, "No javascript files in config/yui.yml" 
        end
      else
        raise Exception, "config/yui.yml Not Found; Do rake js:generate to create one or COMPRESS=ALL to run without a config file"
      end
    end
  end
 
  desc "Generate YUI Compressor Config file"
  task :generate => :environment do
    config_path = Rails.root + "config/yui.yml"
    File.open(config_path, "w+") do |f|
      f.puts <<-CONFIG
---
javascripts:
  - "application.js"
  - "jquery.js"
CONFIG
      puts config_path
    end
  end
 
  def targz()
    tgz_file = "#{Time.now.to_i}.javascripts.tgz"
    `cd #{Rails.root + "public"}; tar -zcf #{tgz_file} javascripts/`
    puts "Backed up assets to: #{tgz_file}"
  end
 
  def compress(path)
    puts "Compressing #{path}"
    file_handle = File.open(path)
    compressed_output = YUI.compress_safe file_handle
    file_handle.close
 
    #overwrite the file
    File.open(path, "w+") { |file| file.puts compressed_output }
  end
 
end

rake js:generate 
# Edit your config/yui.yml file
rake js:yui

rake js:yui COMPRESS=ALL

require 'open3'
require 'stringio'
 
class YUI
  include Open3 
  JAR_PATH = File.join(File.dirname(__FILE__),'yuicompressor-2.4.2.jar')
 
  class << self
    # @param io [String|File]
    # @param options [Hash] - See YUI.cli
    # @returns String
    #
    def compress(io, options = {})
      options[:type]    ||= :js
      options[:charset] ||= "utf-8"
 
      stdin, stdout, stderr = Open3.popen3( YUI.cli(options) )
      stdin.puts streamify(io).read
      stdin.close
 
      my_stderr = stderr.read
      my_stdout = stdout.read
 
      # if compression failed, just output original IO
      if my_stderr.empty?
        return my_stdout
      else
        raise Exception, my_stderr
      end
    end
 
    # If any exceptions are raised, the original string will be
    #   returned incase you are compressing stuff during a deploy
    #   and _just_dont_care_
    def compress_safe(io, options={})
      YUI.compress(io, options)
    rescue Exception => ex
      puts ex.message
      return streamify(io).read      
    end
 
    # Sets up the command line options
    # @param options [Hash]
    #   :jar_path         - [String] Path to the jar file, default "./yuicompress-2.4.2.jar"
    #   :charset          - [String] default 'utf-8'
    #   :type             - [Symbol] Options: js/css, default :js
    #   :line_break       - [Fixnum] Column to add line break at
    #   
    #   if the type of compression is JS, then additional options:
    #     :nomunge        - [Boolean] do not obfuscate
    #     :preserve_semi  - [Boolean] preserve all semicolons
    #     :disable_opt    - [Boolean] Disable all micro optimizations
    # 
    # @returns String
    #
    def cli(options)
      _cmd = ["java -jar #{options[:jar_path] || JAR_PATH}"]
      _cmd << "--type #{options[:type]}"
      _cmd << "--charset #{options[:charset]}" if options[:charset]
      _cmd << "--charset #{options[:line_break]}" if options[:line_break]
 
      if options[:type] == :js  
        _cmd << "--nomunge" if options[:nomunge]
        _cmd << "--preserve-semi" if options[:preserve_semi]
        _cmd << "--disable-optimizations" if options[:disable_opt]
      end
 
      _cmd.join(' ') 
    end
 
    # If a file or a string, treat it like its a stream
    #
    # @param string_or_stream [File|String]
    # @return StringIO
    #
    def streamify(string_or_stream)
      if string_or_stream.respond_to?(:read)
        string_or_stream.rewind if string_or_stream.eof?
        string_or_stream
      else
        StringIO.new(string_or_stream)
      end
    end
 
  end #end class << self
 
end

YUI.compress("function weebleep(){var cool_variable= 3; return cool_variable;}") #=> "function weebleep(){var a=3;return a};"
YUI.compress(File.open( "public/javascripts/application.js")) #=> A bunch of compressed javascript
YUI.compress(File.open( "public/stylesheets/application.css"), {:type => :css}) #=> Compressed stylesheet

class Object
  def rcall(*method_names)
    _result = self
 
    method_names.collect.each { |mname| 
      if _result.respond_to?(mname)
        _result = _result.send(mname)  
      else
        _result = nil
        break
      end
    }
 
    _result
  end
end

 
# In this example, if an of the messages return nil, i'll get a MethodMissing error and I'll be scorned.
my_object.first_message.second_message.the_message_whos_value_i_want
 
# The problem is, I dont care if its nil, I have a default, the method is still missing.
value = my_object.first_message.second_message.the_message_whos_value_i_want || "Im ok with this being nil"
 
# If chain_message encounters a nil, it just returns nil and you can use standard language logic to default that value
# You dont have to do a million if-checks.
value = my_object.rcall( :first_message, :second_message, :the_message_whos_value_i_want ) || "Im ok with this being nil"

# Some cool way of finding purchases, be it AR, Datamapper, or whatever, just get an object already
purchases = Purchase.all( arbitrary_finder_logic )
 
# I need to output the name of who added the product on some arbitrary report no one will read
# yeah, I know. My validators should have made sure the values were there, I'm just making this up.
purchases.each do |purchase|
  buyer = purchase.rcall(:purchaser, :name) || "John Doe"
  seller = purchase.rcall(:product, :listor, :name) || "Jack Sales"
 
  puts "Buyer: #{buyer}, Seller: #{seller}"
end