From: Michael Morin <uzimonkey@...>
Date: 2008-08-18T18:19:06+09:00
Subject: Re: Global constants

Kless wrote:
> I want set up some constants that can be accesed since another
> classes.
> 
> Which is the best way?  Using a singleton to access to variables? (as
> if were global vars.)?
> 

You can use a module for this.  The classes don't necessarily have to be 
in the module either, if outside the module they can address the 
constant as MyModule::CONSTANT or the classes can include MyModule if it 
makes sense to do so.

module MyModule
   CONSTANT = "test"

   class MyClass1
     def print_test
       puts CONSTANT
     end
   end

   class MyClass2
     def say_something
       puts CONSTANT
     end
   end
end

MyModule::MyClass1.new.print_test
MyModule::MyClass2.new.say_something

-- 
Michael Morin
Guide to Ruby
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