This module provides a set of caching hash table functions.
Looks up id in ct. If it is not present, then mk is called to construct the value and add it to ct.
If entry-ids is #f, clears all entries in ct. Otherwise, clears only the entries with keys in entry-ids. The procedure finalize is invoked on each entry before it is cleared.
Changed in version 1.3 of package web-server-lib: Added optional argument for list of entry keys.
Changed in version 1.3: Added optional argument for finalizer procedure.