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| ANSI Common Lisp 18 Hash Tables 18.2 Dictionary of Hash Tables
18.2.10 remhash | Function
  Syntax: remhash key hash-table generalized-boolean Arguments and Values: key - an object. hash-table - a hash table. generalized-boolean - a generalized boolean. Description: Removes the entry for key in hash-table, if any. Returns true if there was such an entry, or false otherwise. Examples:
       (setq table (make-hash-table))  #<HASH-TABLE EQL 0/120 32115666>
       (setf (gethash 100 table) "C")  "C"
       (gethash 100 table)  "C", true
       (remhash 100 table)  true
       (gethash 100 table)   NIL, false
       (remhash 100 table)  false
Side Effects: The hash-table is modified. Allegro CL Implementation Details: None.

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