What is a hash map in JavaScript?

What is a hash map in JavaScript?

A hash map, or hash table, is a data structure that stores key-value pairs. In JavaScript, you can use objects or the Map class to create hash maps.

How do I create a hash map using the Map class?

You can create a hash map using the Map class like this: const myMap = new Map(); Then, you can add key-value pairs using myMap.set(key, value);.

What are the advantages of using a hash map?

Hash maps provide efficient data retrieval, as they allow for average time complexity of O(1) for lookups, insertions, and deletions.

Can you give me an example of using a hash map?

Sure! Here's a simple example:

const myMap = new Map();
myMap.set('name', 'Alice');
myMap.set('age', 25);
console.log(myMap.get('name')); // Output: Alice