æsthetics 

sense of beauty or the appreciation of beauty 

a set of principles underlying and guiding the work of an artist or artistic movement 

"It just looks better." 

principles <=> gut feel 

in Ruby on Rails: :symbols >= "strings" 

class Conference < AR::Base has_many "sessions" has_many "speakers" end 

class Conference < AR::Base has_many :sessions has_many :speakers end 

create_table :users, :force => true do |t| t.string :email, :default => "", :null => false t.string :password, :default => "", :null => false t.integer :sign_in_count, :default => 0 t.datetime :created_at t.datetime :updated_at end 

create_table "users", :force => true do |t| t.string "email", :default => "", :null => false t.string "password", :default => "", :null => false t.integer "sign_in_count", :default => 0 t.datetime "created_at" t.datetime "updated_at" end 

class SurpriseController < AC::Base layout "expected" end 

class SurpriseController < AC::Base layout :expected end 

class SurpriseController < AC::Base layout :expected def expected "surprise" end end