From: "John W. Long" <ng@...>
Date: 2006-01-27T05:14:39+09:00
Subject: Module Eval Syntax

 >> class MyModule; end
=> nil
 >> MyModule.class_variables
=> []
 >> MyModule.module_eval do
?>   @@test = true
 >> end
=> true
 >> @@test
=> true
 >> MyModule.module_eval "@@weird = true"
=> true
 >> @@weird
NameError: uninitialized class variable @@weird in Object
         from (irb):8
 >> MyModule.class_variables
=> ["@@weird", "@@test"]
 >> Object.class_variables
=> ["@@test"]

What in the world is going on here? Why does the block syntax eval 
differently than the string syntax? And why does @@test get defined on 
both MyModule and Object?

--
John Long
http://wiseheartdesign.com