class Dir

def self.remove_empty_directories(dir)
  # List all entries in the directory except for '.' and '..'
  Dir.entries(dir).each do |entry|
    next if entry == "." || entry == ".."  # Skip the current and parent directory entries
    path = File.join(dir, entry)  # Construct the full path
    if File.directory?(path)
      remove_empty_directories(path)  # Recursively call the method if the entry is a directory
      # Remove the directory if it's empty after processing its contents
      Dir.rmdir(path) if Dir.empty?(path)
    end
  end
rescue Errno::ENOENT
  # Handle the case where the directory doesn't exist or is removed before rmdir is called
  puts "Directory not found: #{dir}"
end