From: Sebastian Hungerecker <sepp2k@...>
Date: 2009-05-27T05:42:23+09:00
Subject: Re: How do Class definitions in Ruby differ from other OO languages?

Am Dienstag 26 Mai 2009 00:05:07 schrieb kunjaan:
> What do you mean when you say"Class definitions are executable code".

It means that class definiton happens at runtime. You can have any valid ruby 
expressions inside a class body, and they will be executed as they encountered 
by the parser. Example: loops:

class Foo
  (1..9).each do |i|
    define_method("add#{i}") do |x|
      x+i
    end
  end
end

Foo.instance_methods(false)
#=>["add2", "add9", "add5", "add1", "add8", "add4", "add7", "add3", "add6"]

Foo.new.add5(6)
#=> 11