I want to add some custom javascript functions to my design document, I can't find any examples of how to actually add these functions to the "lib" section of a design document. Can someone show me an example of how to add a function definition to the "lib" section?
Follow up:
I started using couchapp to manage my design documents and it has a really nice macro facility for injecting javascript into map and reduce functions before sending them to the server.
You can't call lib functions from your map or reduce function but you can with all the other CouchDB view server functions.
http://wiki.apache.org/couchdb/commonjs_modules
The reason you can't use outside functions in your map/reduce functions is because the string for the functions is used for hash on the btree for the view so that changes to your document that don't impact the map/reduce functions won't invalidate the entire index and force it to regenerate.