What are some examples of hash map implementations?

What are some examples of hash map implementations?

Hash maps can be implemented in various programming languages. For example, in Python, you can use dictionaries, while in Java, you can use the HashMap class.

Can you show me a simple example in Python?

Sure! Here's a simple example:

# Creating a hash map using a dictionary
hash_map = {'apple': 1, 'banana': 2, 'orange': 3}

# Accessing a value
print(hash_map['banana'])  # Output: 2

What about in Java?

In Java, you can implement a hash map like this:

import java.util.HashMap;

public class Main {
    public static void main(String[] args) {
        HashMap<String, Integer> hashMap = new HashMap<>();
        hashMap.put("apple", 1);
        hashMap.put("banana", 2);

        // Accessing a value
        System.out.println(hashMap.get("banana"));  // Output: 2
    }
}

What are the advantages of using hash maps?

Hash maps provide fast access to data, with average time complexity of O(1) for lookups, insertions, and deletions.