From: "Damián M. González" <lists@...>
Date: 2012-09-17T00:31:33+09:00
Subject: Re: "Anonymous classes or modules", what are? (Marshaling)

Peter Zotov wrote in post #1076193:

> I'm not sure as what was mentioned in the book as I don't have it, but
> I guess
> that it was only talking about _instances_ of anonymous classes. You
> don't often
> need to serialize classes themselves, and, as I've mentioned, you
> cannot serialize
> code, be that closures or methods. Objects with singleton methods will
> have those
> singleton methods lost:
> irb > obj = Object.new
>   => #<Object:0x000000008833a8>
> irb > def obj.bark
> irb >   puts "Howl!"
> irb >   end
>   => nil
> irb > serial = Marshal.dump(obj)
> TypeError: singleton can't be dumped
>          from (irb):18:in `dump'
>          from (irb):18
>          from /home/whitequark/.rvm/rubies/ruby-1.9.3-p194/bin/irb:16:in
> `<main>'

 Is not code what I'm trying to serialize just the state of a class, of
the class object itself, so when the program start it require all the
files needed, included the file which have the class definition, let
say:

#encoding: utf-8
class Foo
  @re = 5
  def initialize(nickname)
    @nickname = nickname
  end
  def self.change_re(n)
    @re = n
  end
  def self.get_re
    @re
  end
end

 Then I want to "refresh" the state of this object, the class object.
Let's suppose that when the program was closed, @re was 56, so I want to
"start" in some way, with this variable settled to 56, not 5. I'm clear
explaining? That is just what I need to do, if you can give me a trick
about what's the best way to save this state and restore it I'll be very
thankfull. :)

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