matstc

def divide x, y
  raise "Cannot divide by zero" if y == 0

  x / y
end

matstc

def divide x, y
  if y == 0
      raise "Cannot divide by zero"
  else
      x / y
  end
end

matstc

def previous
  @trackIndex -= 1

  @trackIndex = 0 if @trackIndex < 0
  @play()
end

matstc

def title_case string
  words = string.split " "
  capitalized_words = words.map {|w| w.capitalize}
  title = capitalized_words.join " "
  return title
end

matstc

def calculate_total items
  sum = 0
  for index in 0...items.length
      sum += items[index].price
  end
  sum
end

matstc

def calculate_total items
  items.map {|item| item.price}.reduce(&:+)
end

matstc

def comment_on_popularity
  if !post.stars.empty?
      if post.stars.count > 100
          "Congratulations. Your post is very popular."
      elsif post.stars.count > 50
          "Well done. Your post is trending."
      else
          "Your post is doing well but could use a little attention."
      end
  else

matstc

def comment_on_popularity
  if post.stars.empty?
      "Your post is flying under the radar."
  else
      if post.stars.count > 100
          "Congratulations. Your post is popular!"
      elsif post.stars.count > 50
          "Well done. Your post is trending."
      else
          "Doing well but could use a little attention."

matstc

def greet user
  title = if user.admin?
              "sir"
          else
              "you"
          end

  "Hello, #{title}!"
end

matstc

def greet user
  "Hello, %s!" % if user.admin?
                     "sir"
                 else
                     "you"
                 end
end