From: Jim Freeze <jim@...>
Date: 2001-02-07T05:23:40+09:00
Subject: [ruby-talk:10454] Instance method in Mixin

Hi:

I have a question about some code in the pickaxe book on page 103:

module Notes
  attr :concertA
  def tuning(amt)
    @concertA = 440.0 + amt
  end
end

class Trumpet
  include Notes
  def initialize(tune)
    tuning(tune)
    puts "Instance method returns #{concertA}"
    puts "Instance variable is #{@concertA}"
  end
end


Trumpet.new(-5.3)

Returns:
Instance method returns 434.7
Instance variable is 434.7

I don't understand where the instance method 'concertA' is defined. I see
that the instance variable '@concertA' is defined.

Can someone please explain this to me.
Thanks

====================================================
Jim Freeze
jim@freeze.org
--------------------------------------------------- 
** http://www.freeze.org **
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