Question

I have a directory named “MyDir”. I m using Ubuntu OS. And I have 7 files with various extensions. I want to write a Ruby Program to add a Timestamp to each of the file.

Answer 1

You’ll need to get a listing of all the files in the target directory (see Dir.glob(...)) and then open the file for writing in “append mode” (see File.open(...)) and simply write in the timestamp. For example:

def add_timestamps(dir, timestamp=Time.now)
  Dir[File.join(dir, '*')].each do |filename|
    File.open(filename, 'a') { |f| f.puts(timestamp) }
  end
end

add_timestamps('MyDir') # OR...
add_timestamps('MyDir', Time.parse('2001-02-03T04:05:06Z'))