From: Brian Candler <b.candler@...>
Date: 2010-08-23T04:53:47+09:00
Subject: Re: case and class

I think of === as meaning 'matches' rather than 'equals'. This is 
especially useful as in

case str
when /^foo/
  ... do something
when /^bar/
  ... something else
end

For classes, you have
case obj
when String
  ...
when Integer
  ...
end
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