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(elisp)Other Hash

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Other Hash Table Functions
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   Here are some other functions for working with hash tables.

 - Function: hash-table-p table
     This returns non-`nil' if TABLE is a hash table object.

 - Function: 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.

 - Function: hash-table-count table
     This function returns the actual number of entries in TABLE.

 - Function: 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'
     (Note: Creating Hash).

 - Function: hash-table-weakness table
     This function returns the WEAK value that was specified for hash
     table TABLE.

 - Function: hash-table-rehash-size table
     This returns the rehash size of TABLE.

 - Function: hash-table-rehash-threshold table
     This returns the rehash threshold of TABLE.

 - Function: hash-table-size table
     This returns the current nominal size of TABLE.