staticify | A better static asset handler for node.js

This a two-part question: (1) Is it good practice to pass higher-order functions static references in order for them (the parameters) to live long enough? (2) What is the best way to create an anonymous variable with static lifetime?

Here's the context: I have a meta-function that returns a closure based on its parameters. In order to make sure the parameters live long enough, they must be static references. E.g.,