From: Robert Klemme <shortcutter@...>
Date: 2009-07-04T04:35:04+09:00
Subject: Re: Using Dir.glob to grab only Directories

On 03.07.2009 20:43, Andrea Fazzi wrote:
> Mario Gr wrote:
>> Hi,
>>
>> I was wondering if there were a way to use Dir.glob to grab only
>> directories.  After searching google for a bit I found ways to pull only
>> file listings, but couldn't find one for just directories.
>>
>> Currently, I'm using FileTest.directory?(dir) before running any
>> operations to test for a directory.
> 
> # Non-recursive
> Dir.glob('*').select { |fn| File.directory?(fn) }
> 
> # Recursive
> Dir.glob('**/*').select { |fn| File.directory?(fn) }

For deep hierarchies it may be more efficient to use Find because you 
avoid creating a large Array with lots of file names most of which you 
do not want.

# untested
require 'find'
DOTS = %w{. ..}

Find.find base_dir do |f|
   next if DOTS.include?(File.basename(f)) || !test(?d, f)
   puts "A dir which is not . or ..: #{f}"
end

Kind regards

	robert

-- 
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