Jose Carrion joselo

The Elements of Programming Style

The following rules of programming style are excerpted from the book "The Elements of Programming Style" by Kernighan and Plauger, published by McGraw Hill. Here is quote from the book: "To paraphrase an observation in The Elements of Style by Strunk and White, the rules of programming style, like those of English, are sometimes broken, even by the best writers. When a rule is broken, however, you will usually find in the program some compensating merit, attained at the cost of the violation. Unless you are certain of doing as well, you will probably do best to follow the rules."

Sublime Text 2 – Useful Shortcuts (Mac OS X)

General

⌘T	go to file
⌘⌃P	go to project
⌘R	go to methods
⌃G	go to line
⌘KB	toggle side bar
⌘⇧P	command prompt

I'm a fan of MiniTest::Spec. It strikes a nice balance between the simplicity of TestUnit and the readable syntax of RSpec. When I first switched from RSpec to MiniTest::Spec, one thing I was worried I would miss was the ability to add matchers. (A note in terminology: "matchers" in MiniTest::Spec refer to something completely different than "matchers" in RSpec. I won't get into it, but from now on, let's use the proper term: "expectations").

Understanding MiniTest::Expectations

Let's take a look in the code (I'm specifically referring to the gem, not the standard library that's built into Ruby 1.9):

# minitest/spec.rb

module MiniTest::Expectations

	FactoryGirl.define do
	sequence :email do \|n\|
	"user#{n}@example.com"
	end

	factory :user do
	email
	password "test"
	aliased_as :author
	end

	<% @models.each do \|model\| %>
	<% if model.image_models.first %>
	<% unless model.image_models.first.document_file_name.blank? %>
	<%= image_tag model.image_models.first.permalink %>
	<% end %>
	<% end %>
	<% end %>

	#Cambiar en el model.rb
	has_many :image_models, :as => :owner, :dependent => :destroy, :order => 'created_at DESC'

	# En el model.rb, nota que cambie created_at DESC por ASC
	has_many :image_models, :as => :owner, :dependent => :destroy, :order => 'created_at ASC'

	# agrega este metodo en le modelo model.rb
	def first_image_permalink
	image = image_models.first
	image.permalink if image && !image.document_file_name.blank?
	end

	#Finalmente de la vista se llamaria asi

	class Category < ActiveRecord::Base
	has_many :children, :class_name => "Category", :dependent => :destroy, :foreign_key => "parent_id"
	belongs_to :parent, :class_name => "Category"
	end

	# Writing readable ruby


	# The bad way
	def to_hash
	hash = {}
	@reports.each do \|report\|
	hash.merge! report.to_hash
	end
	hash

	# Simple Start and Stop tasks for your Solr server.
	# 1 - Download your Solr from http://www.apache.org/dyn/closer.cgi/lucene/solr/ and extract it somewhere
	# 2 - Set the :solr_path with the full path to the Solr "example" dir
	#
	# NOTES:
	# - sunspot_solr gem must be in your Gemfile
	# - It will run the "example" Jetty-embed Solr server (start.jar)
	# - It will automatically pick your project Solr config from your "project_path/solr" with the Sunspot schema and files.

	namespace :deploy do
	task :setup_solr_data_dir do
	run "mkdir -p #{shared_path}/solr/data"
	end
	end

	namespace :solr do
	desc "start solr"
	task :start, :roles => :app, :except => { :no_release => true } do
	run "cd #{current_path} && RAILS_ENV=#{rails_env} bundle exec sunspot-solr start --port=8983 --data-directory=#{shared_path}/solr/data --pid-dir=#{shared_path}/pids"