From: Mike Gold <mike.gold.4433@...>
Date: 2009-02-09T05:23:19+09:00
Subject: Re: best way to protect class instance variables

Jes炭s Gabriel y Gal叩n wrote:
> 
> This could save you from accidental changes, but somebody could always
> do this and trash your frozen array:
> 
> irb(main):017:0> class Blah
> irb(main):018:1> @blah = %w{nothing is really safe}
> irb(main):019:1> end

Data from a closure cannot be overwritten in this way, and could qualify 
as being "really safe".

class MyClass
  class << self
    blah = [0,1]
    define_method(:blah) { blah }
  end
end

p MyClass.blah  #=> [0, 1]
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