From: rio4ruby <Christopher.Kleckner@...>
Date: 2007-06-09T12:05:05+09:00
Subject: Re: Newb Wants to Better His File, Dir code

On Jun 8, 7:31 pm, R. B. Love <rbl...@airmail.net> wrote:
> I've got code working to do what I want but I'm hoping there is a
> better way.  Mine seems clumsy.
>
> My goal is to search over all files,  identify all that are directories
> and then do something to each directory.  I don't need to go into
> directories recursively yet.
>
> The fact that Dir.foreach returns strings seems odd to me.  All advice
> appreciated.
>
> #!/usr/local/bin/ruby
>
> dpath = Dir.getwd
>
> Dir.foreach(dpath) do
>   |x|
>   ddir = File.join(dpath,x)
>   if File.directory?(ddir) && x != "." && x != ".." then
>     puts %x{du -sh #{x}}
>   end
> end

One way simplify your handling of files and directories is to use Rio.
This will require you to install a module that is not a part of the
standard Ruby distribution. The easiest way to do this is:
  gem install rio
(or on Unix or Linux: sudo gem install rio)

Then your code can be reduced to:

require 'rio'

rio.dirs do |x|
  puts %x{du -sh #{x}}
end