activesupport.rb

# active support library
# Active Support is the Ruby on Rails component responsible for providing Ruby language extensions, utilities, and other transversal stuff.

# It offers a richer bottom-line at the language level, targeted both at the development of Rails applications, and at the development of Ruby on Rails itself.

# http://guides.rubyonrails.org/active_support_core_extensions.html

# examples of functions

# blank? and present?
# presence
# duplicable?
# deep_dup
# try
# class_eval(*args, &block)
# acts_like?(duck)
# to_param
# to_query
# with_options

# install
# jruby -S gem install activesupport
# dependencies will be downloaded altogether to your jruby gems folder (you have to figure out where??)

# i18n
# json
# tzinfo
# minitest
# thread_safe

# add dependencies to load path one by one

$:.unshift "C:\\jruby-1.7.4\\lib\\ruby\\gems\\shared\\gems\\activesupport-4.0.0\\lib" # replace with your own
$:.unshift "C:\\jruby-1.7.4\\lib\\ruby\\gems\\shared\\gems\\i18n-0.6.5\\lib"  # replace with your own
$:.unshift "C:\\jruby-1.7.4\\lib\\ruby\\gems\\shared\\gems\\thread_safe-0.1.3-java\\lib" # replace with your own
$:.unshift "C:\\jruby-1.7.4\\lib\\ruby\\gems\\shared\\gems\\tzinfo-0.3.37\\lib" # replace with your own
$:.unshift "C:\\jruby-1.7.4\\lib\\ruby\\gems\\shared\\gems\\json-1.5.0-java\\lib" # replace with your own
$:.unshift "C:\\jruby-1.7.4\\lib\\ruby\\gems\\shared\\gems\\minitest-4.7.5\\lib" # replace with your own

# ready to go now

require 'active_support/core_ext'

# test blank? method
puts nil.blank? == true
puts false.blank? == true
puts {}.blank? == true # it's false!? something wrong with this one on windows 
puts [].blank? == true
puts "".blank? == true
puts false.blank? == true


# test deep_dup
array     = ['string']
duplicate = array.dup
 
duplicate.push 'another-string'
 
# the object was duplicated, so the element was added only to the duplicate
array     #=> ['string']
duplicate #=> ['string', 'another-string']
 
duplicate.first.gsub!('string', 'foo')
 
# first element was not duplicated, it will be changed in both arrays
array     #=> ['foo']
duplicate #=> ['foo', 'another-string']

# do it again using deep_dup
array     = ['string']
duplicate = array.deep_dup
 
duplicate.first.gsub!('string', 'foo')
 
p array     #=> ['string']
p duplicate #=> ['foo']

# you can do the rest