lulalala

it do
  expect{
    @return_result = foo()
  }.to change(Foo, :count).from(1).to(0)
  expect(@return_result).to eq(true)
end

lulalala

# This is generated using toy_scaffold,
# and is meant for learning purposes only.
# It aims for more clarity for beginners, therefore
# sacrifices some best practices and DRY principle.

class BooksController < ApplicationController
  # GET /books
  # View file is at app/views/books/index.html.erb
  def index
    @books = Book.all

lulalala

      start_time = Time.now.to_f
      time_elapsed = lambda { ((Time.now.to_f - start_time) * 1000).to_i }
      logger.info "#{msg} 404 Not Found (#{time_elapsed.call}ms)"

lulalala

#<Rack::BodyProxy: @body=
  #<Rack::BodyProxy: @body=
    #<Rack::BodyProxy: @body=
      #<Rack::BodyProxy: @body=
        #<Rack::BodyProxy: @body=
          #<Rack::BodyProxy: @body=
            #<Sprockets::StaticAsset

lulalala

book.errors.keys
[:title]
book.errors[:base].present?
false
book.errors.keys
[:title, :base]

# and someone does this
if book.errors.keys.include?(:base)
  boom!()

lulalala

      login(user)
      expect(page).to have_content("Logged in")
      visit foo_path

lulalala

foo.save
foo.end_at.strftime('%H:%M:%S.%L')
"20:38:34.447"
foo.reload.end_at.strftime('%H:%M:%S.%L')
"20:38:34.000"

lulalala

require 'nokogiri'
require 'open-uri'

(1..91).each do |i|
  f = Fountain.create(issue:i, title:i)
end

(1..91).each do |i|
  f = Fountain.find_by(issue:i)
  i_s = "%02d" % i

lulalala

# controller
@open_id = params[:open].to_i

# spec
expect(assigns(:open_id)).to eq(@params[:open].to_i)

lulalala

irb(main):016:0> Money.new(1.5) == 0.015.to_money
=> true
irb(main):017:0> Money.new(1.5).instance_variable_get(:@fractional).to_s
=> "1.5"
irb(main):018:0> 0.015.to_money.instance_variable_get(:@fractional).to_s
=> "2.0"