uma_exercise.rb

class Array
  def sum_numbers
    total = 0
    self.each do |n|
      p "#{total} + #{n} = #{total+n}"
      total = total + n
    end
    total
  end
end

class String
  def camel_case
    words_array = self.split 
    words_array.each do |word| 
      unless articles.include?|word|
        word.capitalize!
      end 
    end
    words_array.first.capitalize!
    words_array.join("")
  end
end

class Array  
  def add_index  

  end
end