IP地址與整數的相互轉換

require 'ipaddr'

ip_int=IPAddr.new("192.168.1.1").to_i

int_ip=IPAddr.new(iptoint, Socket::AF_INET).to_s

應用：

require 'ipaddr'

start = IPAddr.new("192.168.1.1").to_i

endy = IPAddr.new("192.168.1.5").to_i

(start..endy).map{|ip|IPAddr.new(ip, Socket::AF_INET).to_s}

=> ["192.168.1.1", "192.168.1.2", "192.168.1.3", "192.168.1.4", "192.168.1.5"]