From: Zak Greant <zak@...>
Date: 2003-03-18T04:45:14+09:00
Subject: Re: irb as a shell

On Tue, Mar 18, 2003 at 04:22:45AM +0900, Mark Wilson wrote:
> Just a note.
> 
> In the past day or two I've started to use irb as a shell to work in, 
> and it's very helpful, although not earth-shattering.
> 
> For example, I did the following in irb to unzip a bunch of files in my 
> working directory:
> 
> system("ls *gz > list")
> a=File.open("list","r")
> b=a.readlines
> b.each { |f| system("gtar -zxf #{f}") }
> b.each { |f| system("rm -rf #{f}") }
> 
> I think this could be done with an ordinary shell, using xargs maybe, 
> but I know how to do it in Ruby. If you have a more elegant way to 
> write the Ruby lines, let me know. Looking at it, I can see that if I 
> remembered the directory methods I could make the first 3 lines one 
> line.

  Something like this should work.

  Dir["*gz].each{ |f| `gtar -xzf #{f} && rm #{f}`}
  
  Cheers
  --zak