प्रथमेश Sonpatki prathamesh-sonpatki

My issues with Modules

In researching topics for RailsCasts I often read code in Rails and other gems. This is a great exercise to do. Not only will you pick up some coding tips, but it can help you better understand what makes code readable.

A common practice to organize code in gems is to divide it into modules. When this is done extensively I find it becomes very difficult to read. Before I explain further, a quick detour on instance_eval.

You can find instance_eval used in many DSLs: from routes to state machines. Here's an example from Thinking Sphinx.

class Article &lt; ActiveRecord::Base

With Heroku's JRuby support you may have already seen that you can run TorqueBox Lite on Heroku. But, that only gives you the web features of TorqueBox. What about scheduled jobs, backgroundable, messaging, services, and caching?

With a small amount of extra work, you can now run the full TorqueBox (minus STOMP support and clustering) on Heroku as well! I've successfully deployed several test applications, including the example Rails application from our Getting Started Guide which has a scheduled job, a service, and uses backgroundable and messaging.

This example uses TorqueBox 3.0.2, but the instructions may work with other TorqueBox versions.

Steps Required

Create a JRuby application on Heroku, or convert an existing application to JRuby. Make sure your application works on JRuby on Heroku before throwing TorqueBox into the mix.
Add th

RedDotRubyConf 2015 links & resources

📆 June 4-5, 2015

🌏 Web site: http://reddotrubyconf.com/ Twitter: http://twitter.com/reddotrubyconf

💁 Ping me @cheeaun on Twitter if you found some awesome stuff for #rdrc2015. This gist will be updated whenever there's new stuff.

🕙 Previously, on RedDotRubyConf...

RedDotRubyConf 2016 links & resources

📆 Jun 23-24, 2016

🌏 Web site: http://reddotrubyconf.com/ Twitter: http://twitter.com/reddotrubyconf

💁 Ping me @cheeaun on Twitter or leave a comment below if you found some awesome stuff for #rdrc2016. This gist will be updated whenever there's new stuff.

🕙 Previously, on RedDotRubyConf...


	def match_package(str)
	str.match /package\s.*;/
	end

	def match_import(str)
	str.match /import\s.*;/
	end

	def match_class(str)

	class Email < ActiveRecord::Base

	scope :by_account, -> account_id { where(account_id: account_id) }

	attr_accessible :template_name, :subject, :content, :user_id, :account_id

	validates :subject, presence: true
	validates :template_name, presence: true
	validates :template_name, uniqueness: { :scope => :account_id }
	validates :content, presence: true

	;; 1.1.1 Lisp atoms
	;; If a list is preceded by single quote, we are telling lisp interpreter to take it as it is
	'(sachin
	rahul
	saurav
	laxman)
	;; If a list is not preceded by single quote, lisp interpreter treats first atom of the list as a function,
	;; and passes all the remaining atoms as arguments to it, and returns result of the function
	(+ 2 2)
	'(this list has (list inside it))

	# Packages and modules are imported to the scope using the import statement.
	# If you wanted just a particular object from a module/package you can use
	# the from <module> import <object>
	import sys
	import requests

	# There are no constants in Python, still we can use a naming convention to
	# imply that to the user of a library.
	BASE_URL = "https://api.github.com"

	require 'fiddle'

	module Python
	def __class__= k
	value = _wrap self
	[k.object_id<<1].pack('Q').unpack('C8').each_with_index {\|n,i\|value[i+8]=n}
	end
	def _wrap klass; Fiddle::Pointer.new Fiddle.dlwrap klass; end
	end

	class Ticket < ActiveRecord::Base
	belongs_to :grouper
	belongs_to :user

	validate :user_cant_be_blacklisted, on: :confirmation
	validate :user_cant_double_book, on: :confirmation

	validate :grouper_cant_be_full, on: :confirmation
	validate :grouper_cant_have_occurred, on: :confirmation