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tjackiw/gist:4335648

Created December 19, 2012 09:57
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Design Patterns: Observer Pattern in Ruby
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gistfile1.rb
car = Car.new(2300)
car.log(100)
=> "The car has logged 100 miles, totaling 2400 miles traveled."
car.log(354)
=> "The car has logged 354 miles, totaling 2754 miles traveled."
car.log(300)
=> "The car has logged 300 miles, totaling 3054 miles traveled."
=> "The car needs to be taken in for service!"
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