From: "Marcel Molina Jr." <marcel@...>
Date: 2006-07-10T03:15:50+09:00
Subject: Re: renaming files randomly

On Mon, Jul 10, 2006 at 01:05:06AM +0900, Bil Kleb wrote:
> dblack@wobblini.net wrote:
> >
> >  Dir.chdir("photos") do
> >    files = Dir["*"]
> >    new_names = [*0...files.size].sort_by { rand }
> >    files.zip(new_names).each do |f,n|
> >      File.rename(f, n.to_s)
> >    end
> >  end
> 
> Thanks David.
> 
> I'll push that over and see what comes back.
> 
> Also, thanks for showing "zip" in action -- I just
> learned about that one a couple months ago and hadn't
> figured out a place to use it yet.

One useful use of zip is transformation two arrays into hash pairs:

  > Hash[*%w(a b c d).zip([1, 2, 3, 4]).flatten]
  => {"a"=>1, "b"=>2, "c"=>3, "d"=>4}

marcel
-- 
Marcel Molina Jr. <marcel@vernix.org>