From: MenTaLguY <mental@...>
Date: 2007-10-18T03:01:59+09:00
Subject: Re: How to combine blocks and recursiveness

On Thu, 18 Oct 2007 02:40:09 +0900, Luis <lcrespom@gmail.com> wrote:
> 	def scan
> 		@path.each_entry do |p|
> 			next if p.to_s == "." || p.to_s == ".."
> 			p = @path + p
> 			if p.file?
> 				finf = FileInfo.new(p)
> 				@files << finf
> 			elsif p.directory?
> 				dinf = DirInfo.new(p)
> 				dinf.scan	# ==> Recursive search of subdirs
> 			end
> 		end
> 		yield @path, @files
> 	end

Another poster mentioned the &block thing, which is probably preferable.

Note that you could also simply do:

 dinf.scan { |p,f| yield p,f }

The advantage to this is that (for shallow recursion), there is less
overhead than creating a Proc object for the block.  The big disadvantage
is that you add an extra layer of yield-ing for each level recursion.

-mental