From: Ralph Shnelvar <ralphs@...32.com>
Date: 2010-08-23T22:52:11+09:00
Subject: === is not a symmetric operator?

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Is my understanding correct that === is not a symmetric operator?  That, in fact,
  X === x
and
  x === X

mean different things?

- - - - -
irb(main):001:0> class X
irb(main):002:1> end
=> nil
irb(main):003:0> x = X.new
=> #<X:0x4d3a660>
irb(main):004:0> x === X
=> false   # this is surprising
irb(main):005:0> X === x
=> true    # this is the test I want ... but was surprised when
           # x === X didn't work.
irb(main):006:0>
- - - - -

Does x === X ever mean anything useful?
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