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string_1 = "Hello"
string_2 = "Hello"
puts "string_1's id is #{string_1.object_id}."
puts "string_2's id is #{string_2.object_id}."

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2.4.3 
Order of parameters and arguments 
What output would you expect from this code snippet? 
def mixed_args(a,b,*c,d) 
puts "Arguments:" 
puts a,b,c,d 
end 
mixed_args(1,2,3,4,5) 

hatası da bu

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ef Ticket.most_expensive(*tickets)
tickets.max_by(&:price)
end
Now we can use the Ticket.most_expensive method to tell which of several tickets is
the most expensive. (We’ll avoid having two tickets with the same price, because our
method doesn’t deal gracefully with that situation.)
th = Ticket.new("Town Hall","11/12/13")
cc = Ticket.new("Convention Center","12/13/14/")
fg = Ticket.new("Fairgrounds", "13/14/15/")
th.price = 12.55

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require "stacklike"
class Stack
  include Stacklike
end




/home/fatih/Belgeler/RubyApplication1/lib/stack.rb:8: uninitialized constant Stack::Stacklike (NameError)

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# 
# To change this template, choose Tools | Templates
# and open the template in the editor.
 

module StackLike
  
  def stack
    @stack ||= []

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# 
# To change this template, choose Tools | Templates
# and open the template in the editor.
 

require "stacklike"

class Suitcase
  
end

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module Stacklike
def stack
@stack ||= []
end
B
def add_to_stack(obj)
stack.push(obj)
end
def take_from_stack
stack.pop

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# 
# To change this template, choose Tools | Templates
# and open the template in the editor.
 

module Stacklike
  
  def stack
    @stack ||= []
  end

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NetBeansProjects/simple_cms$ rails g migration myMigration --trace
/usr/local/lib/ruby/gems/1.9.1/gems/actionpack-3.0.5/lib/action_dispatch/routing/mapper.rb:171:in `default_controller_and_action': missing :action (ArgumentError)
	from /usr/local/lib/ruby/gems/1.9.1/gems/actionpack-3.0.5/lib/action_dispatch/routing/mapper.rb:72:in `normalize_options!'
	from /usr/local/lib/ruby/gems/1.9.1/gems/actionpack-3.0.5/lib/action_dispatch/routing/mapper.rb:55:in `initialize'
	from /usr/local/lib/ruby/gems/1.9.1/gems/actionpack-3.0.5/lib/action_dispatch/routing/mapper.rb:272:in `new'
	from /usr/local/lib/ruby/gems/1.9.1/gems/actionpack-3.0.5/lib/action_dispatch/routing/mapper.rb:272:in `match'
	from /usr/local/lib/ruby/gems/1.9.1/gems/actionpack-3.0.5/lib/action_dispatch/routing/mapper.rb:1173:in `match'
	from /usr/local/lib/ruby/gems/1.9.1/gems/actionpack-3.0.5/lib/action_dispatch/routing/mapper.rb:1360:in `match'
	from /usr/local/lib/ruby/gems/1.9.1/gems/actionpack-3.0.5/lib/action_dispatch/routing/mapper.rb:259:in `r

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SimpleCms::Application.routes.draw do
  resources :posts
  root :controller => "posts"
  
  # The priority is based upon order of creation:
  # first created -> highest priority.

  # Sample of regular route:
  #   match 'products/:id' => 'catalog#view'
  # Keep in mind you can assign values other than :controller and :action