From: Roy Sutton <roys@...>
Date: 2006-04-21T07:23:09+09:00
Subject: Re: Converting IP range to array of IP's

Peter Ertl wrote:
> had some fun with that :-)
>
> require 'pp'
>
> def ip_range(range, &block)
>   start, delta = range.split("-").map do |ipstr|
>     ipstr.split(".").map do |number| number.to_i end
>   end
>   
>   (0..3).each do |pos|
>     delta[pos] -= start[pos]
>   end
>
>   (0..delta[0]).each do |d0|
>     (0..delta[1]).each do |d1|
>       (0..delta[2]).each do |d2|
>         (0..delta[3]).each do |d3|
>           yield [start[0] + d0, start[1] + d1, start[2] + d2, start[3] + d3]
>         end
>       end
>     end
>   end
> end
>   
> ip_range("192.168.1.1 - 192.169.2.5") do |ip| 
>   pp ip
> end
Not to rain on your parade but I believe that range should include a few 
thousand more IP addresses (e.g. 192.169.1.254)