How can I convert an IP address into an integer with Lua?

Question

In Lua how would I go about converting a string containing an IP address into an integer?

Answer 1

IPv4 I assume? and how do you want it as an integer? maybe:

local str = "127.0.0.1"
local o1,o2,o3,o4 = str:match("(%d%d?%d?)%.(%d%d?%d?)%.(%d%d?%d?)%.(%d%d?%d?)" )
local num = 2^24*o1 + 2^16*o2 + 2^8*o3 + o4