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18.2.13 clrhash [Function]

clrhash hash-table ⇒ hash-table

Arguments and Values::

hash-table—a hash table.

Description::

Removes all entries from hash-table, and then returns that empty hash table.

Examples::

 (setq table (make-hash-table)) ⇒  #<HASH-TABLE EQL 0/120 32004073>
 (dotimes (i 100) (setf (gethash i table) (format nil "~R" i))) ⇒  NIL
 (hash-table-count table) ⇒  100
 (gethash 57 table) ⇒  "fifty-seven", true
 (clrhash table) ⇒  #<HASH-TABLE EQL 0/120 32004073>
 (hash-table-count table) ⇒  0
 (gethash 57 table) ⇒  NIL, false

Side Effects::

The hash-table is modified.