Here are some other functions for working with hash tables.
hash-table-p
table ¶This returns non-nil
if table is a hash table object.
copy-hash-table
table ¶This function creates and returns a copy of table. Only the table itself is copied—the keys and values are shared.
hash-table-count
table ¶This function returns the actual number of entries in table.
hash-table-test
table ¶This returns the test value that was given when table was
created, to specify how to hash and compare keys. See
make-hash-table
(see Creating Hash Tables).
hash-table-weakness
table ¶This function returns the weak value that was specified for hash table table.
hash-table-rehash-size
table ¶This returns the rehash size of table.
hash-table-rehash-threshold
table ¶This returns the rehash threshold of table.
hash-table-size
table ¶This returns the current nominal size of table.