What is rehashing in hash maps?
An example of an AI chatbot conversation about rehashing in hash maps.
What is rehashing in hash maps?
Rehashing is the process of resizing a hash map and recalculating the hash values for its entries when the load factor exceeds a certain threshold.
Why do we need to rehash?
Rehashing helps maintain efficient performance by reducing the likelihood of collisions, which can slow down operations like insertion and lookup.
How does the rehashing process work?
During rehashing, a new larger array is created, and each entry from the old array is reinserted into the new array based on their new hash values.
What are the performance implications of rehashing?
Rehashing can be costly in terms of time complexity, as it requires iterating through all existing entries, but it improves long-term performance.
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