From: Dan Zwell <dzwell@...>
Date: 2007-06-09T12:42:10+09:00
Subject: Re: Newb Wants to Better His File, Dir code

Michael T. Richter wrote:
> On Sat, 2007-09-06 at 11:35 +0900, R.B.Love 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
> 
> 
> Try:
> 
> 
>         dirs = Dir.entries(".").reject{|e| /\.{1,2}/ =~ e}.find_all{|e|
>         File.directory? e}
> 
> 
> At this point you have a list of directory names.  You can do whatever
> you like to that list using .each(), .inject(), .collect(), etc.
> 

The above has a small bug: it rejects all hidden directories. If you 
want to block only ".." and ".", then change it to:

	dirs = Dir.entries(".").reject{|e| /\.{1,2}$/ =~ e}.find_all{|e|
		File.directory? e}