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Exercise 6

Write a method called age that calls a private method to calculate the age of the vehicle. Make sure the private method is not available from outside of the class. You'll need to use Ruby's built-in Time class to help.

Solution

class Vehicle
  # code omitted for brevity...
  def age
    "Your #{self.model} is #{years_old} years old."
  end

  private

  def years_old
    Time.now.year - self.year
  end
end

# code omitted for brevity...

puts lumina.age   #=> "Your chevy lumina is 17 years old"

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