From: Jim Freeze <jfreeze@...>
Date: 2002-01-17T03:16:33+09:00
Subject: Protecting a member hash

Hi:

I have a class that stores data in a hash.
I would like the user to be able to retrieve
values from the hash, but not modify it.

class Test
  attr_reader :entity
  def initialize
    @entity = {'a'=>"fred"}
  end
end

t = Test.new
p t.entity   #=> {"a"=>"fred"}
t.entity['a'] = "changed"
p t.entity   #-> {"a"=>"changed"}


Other than freezing @entity, is it possible
top protect it from being changed?

Thanks
-- 
Jim Freeze
Today is a fine day for Ruby programming.
www.freeze.org