Claudia Farias clauda

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

HTTP caching

Kinds of caches

Browser
Proxy
Gateway

TODO Difference between proxy and gateway caches.

	# This class should parse a yaml configuration file.
	#
	require 'ostruct'

	class APISettings
	def self.cross_origin_resource_sharing
	OpenStruct.new(allow: ['http://127.0.0.1:8080', 'http://localhost:8080'])
	end
	end

	# This file should be placed on the directory of ~/blog/config

	upstream unicorn {
	server unix:/tmp/unicorn.todo.socket fail_timeout=0;
	}

	server {
	listen 80 default;
	#server_name example.com;
	root /home/username/blog/public;

	(function(global) {

	var silpUrl = '//s3-eu-west-1.amazonaws.com/silp.shootitlive.com/js/silp.min.js';

	// Globals
	if(!global.Silp) { global.Silp = {}; };
	var Silp = global.Silp;

	// To keep track of which embeds we have already processed
	if(!Silp.foundEls) Silp.foundEls = [];

	{
	"estados": [
	{
	"sigla": "AC",
	"nome": "Acre",
	"cidades": [
	"Acrelândia",
	"Assis Brasil",
	"Brasiléia",
	"Bujari",

	/**
	* Extend Recent Posts Widget
	*
	* Adds different formatting to the default WordPress Recent Posts Widget
	*/

	Class My_Recent_Posts_Widget extends WP_Widget_Recent_Posts {

	function widget($args, $instance) {

	source :rubygems

	gem "sinatra", "~> 1.3.2"

	group :test do
	gem "minitest", "~> 2.10"
	gem "rack-test", "~> 0.6.1"
	gem "capybara", "~> 1.1"
	gem "capybara-webkit", "~> 0.11"
	gem "capybara_minitest_spec", "~> 0.2"

	ENV["RAILS_ENV"] = "test"
	require File.expand_path('../../config/environment', __FILE__)
	require 'rails/test_help'
	require 'minitest/autorun'
	require 'minitest/pride'
	require 'capybara/rails'


	class MiniTest::Spec
	include ActiveSupport::Testing::SetupAndTeardown

	# 2. Include Sweeping module in your controller(s) to have cache_sweeper
	# method to be avaliable, or right in ApplicationController so it will be
	# available in all controllers inheriting from it.

	class ApplicationController < ActionController::Base
	include ActionController::Caching::Sweeping

	# ...
	end