That code is from “Programming in Lua by Roberto Ierusalimschy, which was written for Lua 5.0. Now Lua is at version 5.1, that work is a little out of date but still useful as a starting point.

Ever since hearing the news that Turbine will allow players to create mods for Lord of the Rings Online using the Lua programming language, the community's been abuzz about what this means for ...