Nmap: Network Exploration and Security Auditing Cookbook - Second Edition

Linked lists

Because tables can store references to other tables, we can implement linked lists in a pretty straightforward way by assigning a field as the next-link reference:

   linked_list = nil   contactA = { name="Paulino Calderon", num=123456789 }   contactB = { name="John Doe", num=1111111 }   contactC = { name="Mr T", num=123 }   linked_list = {data = contactA, ptr = linked_list }   linked_list = {data = contactB, ptr = linked_list }   linked_list = {data = contactC, ptr = linked_list }   local head = linked_list   while head do     print(string.format("%s:%s", head.data["name"],      head.data[“num”])head =        head.ptr   end

The output will be as follows:

   Mr T:123   John Doe:1111111   Paulino Calderon:123456789