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Ruby-on-Rails TDD Example

Implemented Contact#age

Contacts/app/models/contact.rb

class Contact < ActiveRecord::Base
  
	def age
		unless date_of_birth.is_a?(Date)
			return nil
		end
		age = Date.today.year - date_of_birth.year
		age -= 1 if Date.today < date_of_birth + age.years #for days before birthday
		age = 0 if age < 0
		return age
	end
end