Loops: Title Case - Bloc.io: Full Stack

title_case.rb

class Title

  attr_reader :str

  def initialize(str)
    @str = str
  end

  def fix

    common_words = ["the", "of", "a", "on", "in", "for", "by"]
    fixed = []

    str.downcase.split.each_with_index do |word, index|

      if index > 0 && common_words.include?(word)
        fixed << word
      else
        fixed << word.capitalize
      end

    end
    fixed.join(" ")
  end

end

my_title = Title.new("a title OF A book")
p my_title.fix