Can you explain how to implement a hashmap?

Can you explain how to implement a hashmap?

Sure! A hashmap is a data structure that maps keys to values for efficient data retrieval. You can implement it using an array and a hash function.

What is a hash function and how does it work?

A hash function takes an input (or 'key') and produces a fixed-size string of bytes. The output is typically a number that represents the index in the array where the value will be stored.

How do you handle collisions in a hashmap?

Collisions occur when two keys hash to the same index. You can handle them using techniques like chaining (linking entries) or open addressing (finding another open slot).