From: CT <demerzel@...>
Date: 2004-07-25T20:27:56+09:00
Subject: Re: [NUBY] Instance variable accessible from class method?

On Sun, 25 Jul 2004 19:57:46 +0900, Alexey Verkhovsky <alex@verk.info> wrote:
> Result of executing this code:
> 
> class MyClass
> 
>   @instance_variable = "aaa"

Here, @instance_variable is an instance variable of the class object MyClass.
See: http://www.rubygarden.org/ruby?ClassInstanceVariables

Everything is an object in Ruby, even classes.

You were probably looking for something like:
class MyClass
 def initialize
   @instance_variable = "aaa"
#this means @instance_variable is an instance variable for 
#objects of this class
 end

  def MyClass::class_method
   puts @instance_variable
 end
 end

In which case MyClass.class_method will print 'nil', as expected. 

HTH
- CT

>   def MyClass::class_method
>     puts @instance_variable
>   end
> 
> end
> 
> MyClass.class_method
> 
> is "aaa".
> 
> I expected it to be "undefined variable".
> 
> What is the meaning of instance variable being accessible from a class
> method? Which instance holds the value of that variable, if none has
> been explicitly created yet?
> 
> Best regards,
> Alexey Verkhovsky
> 
>