From: david wright <david_v_wright@...>
Date: 2008-11-19T15:37:25+09:00
Subject: Re: selected field assignment


--- On Tue, 11/18/08, Bil Kleb <Bil.Kleb@gmail.com> wrote:

> From: Bil Kleb <Bil.Kleb@gmail.com>
> Subject: selected field assignment
> To: "ruby-talk ML" <ruby-talk@ruby-lang.org>
> Date: Tuesday, November 18, 2008, 8:51 AM
> Hi,
> 
> I'm grabbing the owner and file names from `find .
> -perm -g+r -ls`
> which has ls -dgils output like,
> 
>   6744065        8 -rw-r--r--    1 kleb     users         
> 289 Nov 30
> 2007 Ruby/README
> 
> with something like,
> 
>   find_result.each_line do |line|
>     fields = line.split
>     user_name, file_name = fields[4], fields.last
> 
> I've also played with,
> 
>   _,_,_,_,user,_,_,_,_,_,file = a.split
> 
> But both leave me thinking there is a better way without
> resorting
> to a regex?
> 
> Thanks,
> --
> http://twitter.com/bil_kleb

looks like you got several possible suggestions.
here is one more, not exact but plausible.

avoid system calls, do it all in ruby.

#!/usr/bin/env ruby

require 'find'
require 'etc'

path = ENV["HOME"]+'/ruby' 

Find.find(path) do |file|
    if FileTest.directory?(file)
        if File.basename(path)[0] == ?.
            Find.prune
        else
            next
        end
    else
        f = File.new(file)
        s = f.stat
        g_read = sprintf("%o", s.mode)
        if ( g_read.to_i >= 100640 )
             print "file: #{file}\t"
             puts "owner: #{Etc.getpwuid(s.uid).name}"
        end
    end
end