From: Dmitry Perfilyev <dmitry1976@...>
Date: 2008-12-11T08:57:18+09:00
Subject: why Hash corrupts  'key' object ?

Hi, I have next script:
t.rb:
===========================
class TestStr < String
  attr_accessor :dupstr
  def initialize ( str )
    @dupstr = str
    super(str)
  end
end
ts=TestStr.new("aaa")
puts ts.dupstr
h=Hash.new()
h[ts]=true
puts h.keys.first.class
puts h.keys.first
puts h.keys.first.dupstr
===========================

run it:

$ ruby t.rb
aaa
TestStr
aaa
nil
$

The question is - why there is 'nil' in the last line instead of "aaa" ?
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