How does resizing a hash map work?

How does resizing a hash map work?

Resizing a hash map involves creating a new larger array and rehashing existing entries to fit into this new array.

Why do we need to resize a hash map?

We resize a hash map to maintain efficient performance, especially when the load factor exceeds a certain threshold.

What happens to the existing data during resizing?

During resizing, existing data is rehashed and redistributed into the new array to ensure proper access.

Is there a downside to resizing a hash map?

Yes, resizing can be costly in terms of time complexity, as it requires rehashing all existing entries.

How can I implement resizing in my hash map?

You can implement resizing by checking the load factor and, when necessary, creating a new array and rehashing the entries.