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| ANSI Common Lisp 18 Hash Tables 18.2 Dictionary of Hash Tables
18.2.6 hash-table-rehash-threshold | Function
  Syntax: hash-table-rehash-threshold hash-table rehash-threshold Arguments and Values: hash-table - a hash table. rehash-threshold - a real of type `(real 0 1)`. Description: Returns the current rehash threshold of hash-table, which is suitable for use in a call to make-hash-table in order to produce a hash table with state corresponding to the current state of the hash-table. Examples:
       (setq table (make-hash-table :size 100 :rehash-threshold 0.5))
       #<HASH-TABLE EQL 0/100 2562446>
       (hash-table-rehash-threshold table)  0.5
Exceptional Situations: Should signal an error of type type-error if hash-table is not a hash table. See Also: make-hash-table, hash-table-rehash-size Allegro CL Implementation Details: None.

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