I had a cool thought: what if you used metatables to make a really cool caching scheme? If it hits the `__index` metatable, you return a function that'll add a key-value pair, otherwise you return the value. Don't have time to work on it right now, so I'm just posting this barebones gist until I get around to it.

cache.lua

#!/usr/bin/env lua

-- Get the cache singleton
function getCache()
    -- TODO
end

-- Metatable function that returns a function to add to the cache