From: Chris Hulan <chris.hulan@...>
Date: 2011-10-05T00:42:00+09:00
Subject: Re: Local vs method vs instance (was: Operator Overloading)

My understanding (probly flawed) is
attr_reader :x

generates the following code:

def x
  @x
end

so in bar that 'x' is a call to the x method, which returns the '@x' value
but doing it this way makes the x public readable, so should only be
used if that is needed
I'd stick with using @x