From: "U.Nakamura" <usa@...>
Date: 2007-03-22T11:23:08+09:00
Subject: Re: Extensions to ipaddr.rb

Hello,

In message "Extensions to ipaddr.rb"
    on Mar.21,2007 19:11:10, <b.candler@pobox.com> wrote:
| I'd like to contribute the following extensions to ipaddr.rb 
| 
| They allow the following constructs: 
| 
|  puts IPAddr.new("192.168.0.0") + 1          # => 192.168.0.1
|  puts IPAddr.new("192.168.0.0") - 1          # => 192.167.255.255
|  puts IPAddr.new("192.168.0.0/24").netmask   # => 255.255.255.0
|  puts IPAddr.new("192.168.0.0/24").prefixlen # => 24
|  puts IPAddr.new("192.168.0.0/24").size      # => 256 

Hmm, I have two more suggestions (sorry, without patch).

 * IPAddr#succ (and IPAddr#succ!)
    addr = IPAddr.new("192.168.0.0")
    puts addr.succ                    # => 192.168.0.1

 * IPAddr#<=>
    addr1 = IPAddr.new("192.168.0.1")
    addr2 = addr1.succ
    puts addr1 <=> addr2              # => -1
    puts addr1 <=> addr1              # => 0
    puts addr2 <=> addr1              # => 1

If these two methods added, we will be able to use Range of
IPAddr like this...

  for addr in IPAddr.new("192.168.0.1")..IPAddr.new("192.168.0.254")
    puts addr
  end


Regards,
-- 
U.Nakamura <usa@garbagecollect.jp>