From: konsu <konsu@...>
Date: 2006-02-16T09:48:28+09:00
Subject: why does this freeze not work?

hello,

i need to set an instance variable in my object once and make sure this 
variable is not changed afterwards. i tried the code below which i expected 
to fail with a TypeError but it happily outputs '2'. i kind of understand 
why it succeeds, i think it just creates another @id when i call id=() 
method, but is there a way to do what i want to do?

thanks
konstantin

class C
  attr_accessor :id

  def initialize(id)
    @id = id
    @id.freeze
  end
end

c = C.new(1)
c.id = 2

puts c.id