From: Patrick Li <patrickli_2001@...>
Date: 2008-09-01T12:47:25+09:00
Subject: Re: instance_eval/class_eval including/extending modules

Now that I have a firmer grasp on Ruby's object system, is it possible 
to combine some of these methods, so that they're easier to understand?


Here's some changes that can be made:


Let me know what you think
  -Patrick

What it does:
Combines eval/instance_eval/class_eval into one consistent method
Combines include/extend into one consistent method

Changes:

eval(proc)
-eval is now a method of Object. This ALWAYS sets self to the receiver 
object,

and then evaluates proc.

def myMethod
-def is now a method of Module. This creates a method named myMethod() 
that

can be called by instances of the receiver.

Consequences: This means that if self is not a subclass of Module, you 
cannot

call def. Instead I propose a metaclass method that returns an objects

metaclass.

So instead of:
obj.instance_eval do
  def myMethod; end
end

you MUST do:
obj.metaclass.instance_eval do
  def myMethod; end
end

include myModule
-becomes a method of Object. This method puts the method definitions in 
myModule into the receiver object.
-- 
Posted via http://www.ruby-forum.com/.