jnunemaker

# from http://avdi.org/talks/confident-code-rubymidwest-2011/confident-code.html

class NullObject
  def method_missing(*)
    self
  end

  def nil?
    true
  end

jnunemaker

# from http://avdi.org/talks/confident-code-rubymidwest-2011/confident-code.html

opt = {}.fetch(:required_option)
# IndexError: key not found

opt = {}.fetch(:required_option) do
  raise ArgumentError, "Missing option!"
end
# ArgumentError: Missing option!

jnunemaker

TwoDimensionalList      := Object clone
TwoDimensionalList list := List clone

TwoDimensionalList dim  := method(x, y,
  for(i, 1, y,
    self list push(List clone setSize(x))
    self
  )
)

jnunemaker

require 'rubygems'
require 'highline/import'
require 'heroku'
require 'pp'

email = ask('Email: ')
password = ask('Password: ') { |q| q.echo = false }

client = Heroku::Client.new(email, password)

jnunemaker

class UserPresenterTest < Test::Unit::TestCase
  def test_as_json
    user = Factory(:user, {
      :first_name => 'John',
      :last_name  => 'Nunemaker',
      :email      => 'john@doe.com',
    })
    json = UserPresenter.new(user).as_json
    urls = json['urls']

jnunemaker

Posted to the REE Google Group as well: https://groups.google.com/forum/#!topic/emm-ruby/EBkMfFpk40A

A week back I innocently updated Sinatra on an app which in turn updated Rack. Since then, I've had crazy hung passenger processes that just gobble up CPU like it is going out of style.

After spending a few days trying everything I knew to to fix it, today I got help from a friend (Eric Lindvall) and dug in with strace, rbtrace, gdb, and gdb.rb and found the issue. Rack 1.3.0 tests a regex against a URL and it causes things to hang.

jnunemaker

# How we store all time views across the entire system for http://gauge.es.
# All in one document that gets incremented using MongoDB $inc modifier in
# every track. The $inc increments t, year.t, year.month.t, year.month.day.t
# so we get to the day numbers. These are in EST, as we are in EST and these
# stats are just for us. :) Nothing amazing, but thought I would share.
#
# >> pp View.all_time
{
  "_id"   => "all_time",
  "t"     => 502352,

jnunemaker

Why You Should Never Use An ORM

Having built two object mappers in Ruby (MongoMapper and ToyStore), I would like to 
throw out a crazy thought. What if, on your next project, you ditch the ORM. 

No ActiveRecord. No DataMapper. No anything. Just you and a lower level driver, whispering
sweet nothings into Ruby classes and modules. Could you? Would you? DARE you? 

We Rubyists are all about aesthetics, right? We love declaring has_many and belongs_to!
Scope this! Boom! Instant magic happens behind the scenes. Fancy proxies are assembled, 

jnunemaker

require 'pp'
require 'zlib'
require 'benchmark'
require 'rubygems'
require 'active_support/gzip'
require 'mongo_mapper'

MongoMapper.database = 'testing'
MongoMapper.database.collections.each(&:remove)

jnunemaker

# gem install sunspot_rails
class Foo
  include MongoMapper::Document
  include Sunspot::Rails::Searchable

  key :title, String

  searchable do
    text :title
  end