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Mastering Data Structures and Sorting Algorithms in JavaScript

Hash Table (Implementation)

Explore how to implement a hash table class in JavaScript with a custom hashing function. Learn to add key/value pairs efficiently and perform quick data lookups with constant time complexity.

We'll cover the following...

To implement a hash table, we create a class.

Node.js
class HashTable {
  constructor() {
    this.values = {};
    this.length =  0;
    this.size =  0;
  }
}

The constructor contains an object in which we’re going to store the values, the length of the values, and the entire size of the hash table: meaning how many buckets the hash table contains. Somewhere in these buckets, we can store our data.

Next, before we can do anything else, we need to implement our hashing function. One example ...