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#!/bin/sh

rvm_current=`rvm current`

echo "Installing ruby-debug with $rvm_current ..."

curl -OL http://rubyforge.org/frs/download.php/75414/linecache19-0.5.13.gem
curl -OL http://rubyforge.org/frs/download.php/75415/ruby-debug-base19-0.11.26.gem

gem install linecache19-0.5.13.gem ruby-debug-base19-0.11.26.gem ruby-debug19 -- --with-ruby-include=$rvm_path/src/$rvm_current

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ActiveRecord::Base.subclasses.
  map {|model| model.reflections.values.select {|association| [:has_many, :has_one].include? association.macro }}.flatten.
  each {|association| association.options[:dependent] = :destroy }

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# heredocs are quite flexible
  without_initial_indentation = <<-END.gsub(/^ {4}/, '')
    foo
      bar
    foo
      bar
  END


# another example

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# Get backtrace for each thread
# ruby 1.9
Thread.list.map(&:backtrace)

# ruby enterprise edition
# http://www.rubyenterpriseedition.com/documentation.html#_obtaining_the_backtrace_of_all_threads
require 'thread'
caller_for_all_threads

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# call methods like constants

module Foo
  def self.bar
    'tadam'
  end
end

Foo::bar # => tadam

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# power of extend

# can be used to add methods only to top-level object
module Rake
  def task
    :executed
  end
end

extend Rake

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# "python-like" import

load path, true # => will load new constants and methods under anonymous module
Module.nesting.first # => inside loaded file will return the current namespace

###

module PythonImport
  def import(path)
    load 'importer.rb', true

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# magic double assignment
a = [[a,1]] # => [[[[nil, 1]], 1]]

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# fun with constant resolution
class Magic
  def self.const_missing(const)
    'for children'
  end
end


p Magic::Bunny # => for children

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# Module.constants allows you to check all available at point of call constants

module Bar
  AvailableUnderNamespace = :constant
end

class Foo
  include Bar
  p Module.constants.include?(:AvailableUnderNamespace) # => true
end