Get lastest filename

tool.rb

class Tool
  def get_lastest()
    Dir.glob("**/**/*.rb") do |filename|
      puts "filename: #{filename},atime:#{File.stat(filename).atime}"
    end

    # get filename with most access time ##!! use min, but max
    Dir.glob("**/**/*.rb").sort { |a, b| File.stat(a).atime <=> File.stat(b).atime }.min
  end
end