From: 7stud -- <bbxx789_05ss@...>
Date: 2007-11-06T03:43:39+09:00
Subject: Re: Reading a class-file and calling it at runtime.

Sean O'halpin wrote:
>
> plugin_class = Object.const_get(plugin_class_name).new
>

I have a question about using Object as the receiver in the above line. 
Is there any specific reason you are using Object?  I find calling 
const_get with Object very confusing because the Object class does not 
define a const_get method--it's only tracking const_get through ruby's 
extremely confusing circular inheritance:

Object  <------+
  |            |
  V            |
Module         |
--const_get    |
               |
  |            |
  V            |
Class ---------+

that const_get lands in Object.  Since calling const_get with any of the 
class names Object, Module, or Class seems to work, why not just use 
Module or Class to call const_get?  If no Modules are involved, which 
seems to be the op's case, then Class would seem like the least 
confusing name to call const_get with.

#plugin.rb:

class Dog
  def speak
    puts "Woof woof"
  end
end

-----------

#my_program.rb:

require 'plugin'

dog_class = Class.const_get("Dog")
dog = dog_class.new
dog.speak

Of course calling const_get with Class might still result in some 
confusion--looking up the methods for Class will not reveal a const_get 
method.
-- 
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