Need help for the following question, please provide clear codings and at least

Question

Need help for the following question, please provide clear codings and at least 2 sample testers for the code:

Rehashing requires recomputing the hash function for all items in the hash table. Since computing the hash function is expensive, suppose objects provide a hash member function of their own, and each object stores the result in an additional data member the first time the hash function is computed for it. Show how such a scheme would apply for the Employee class in Figure 5.8, and explain under what circumstances the remembered hash value remains valid in each Employee. Figure 5.8:

Thanks for your help.

Explanation / Answer

The old values would remain valid if the hashed values were less than the old table size.

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