Recursing through Directories in Ruby

I was trying to print the directories and files recursively, this task was daunting, for me, in Ruby, as I am from Java. I was trying to do the same way that the way we do it in Java. During this course of time, I tried in several ways. Now, the way I implemented is different, Ruby way.

Here our task is to print only the files and its size. In ruby, the code is as follows.

require 'FileUtils'
class DirectoryProbe
def self.print_all_files filename
if File.directory?(filename)
Dir.chdir(filename)
files = Dir['**/*']
files.each{ |file|
unless File.directory?(file)
puts "#{file} \t #{File.size(file)} bytes"
end
}
end
end
end


Dir.chdir(file) issues a command cd in windows and linux. The code Dir['**/*'] returns the array containing all the files in the directory recursively. After that I work on each file separately.