Loops - Title Case

Loops - Title Case

class String 
        def title_case
          array_of_words = self.downcase.split
          list_of_articles = ["the", "of", "and", "a"]
          array_of_words.each do |word|
              unless list_of_articles.include? word
                     word.capitalize!
              end
          end  
          array_of_words.first.capitalize!
          array_of_words.join(" ")
        end   
end 

#word.capitalize! unless list_of_articles.include?(word)
        
"the great gatsby?".title_case