Memoize functions

[Florian Berger <fberger@...>]

Hi.

In the book Programming in Lua is an interesting chapter (17.1) about 
Memoize functions. The idea seems to work fine for simple data types 
like numbers and strings. But what if one or more of function's 
parameters are tables or functions? For tables I could make copies from 
parameter tables and then compare if the table is exactly the same for 
later function calls. Could this be implemented in a better way? What 
about functions? Is it possible to find out if function contents have 
changed?

Floru