Data Structures in TypeScript

Introduction

The book "TypeScript Data Structures" (author — Ahmad Farid, 2021, 280 pages) is a practical guide that fills an important niche at the intersection of typed JavaScript and classical algorithms. Unlike most books on data structures written in Java, C++ or Python, this work is focused specifically on TypeScript — a language gaining popularity in web development and backend projects on Node.js. The author offers not just theory, but ready-to-use implementations accompanied by strict typing and examples.

What the book is about

The book sequentially covers all major data structures: from simple ones (arrays, linked lists) to complex ones (trees, graphs, hash tables). Each chapter contains:

• a theoretical description of the structure and its time complexity;
• an implementation in TypeScript using generics and interfaces;
• examples of application in real-world tasks (searching, sorting, caching);
• exercises for independent work.

Special attention is paid to type safety: the author shows how TypeScript helps avoid errors when working with data, and how to properly design abstractions.

Who this book is for

The book is intended for developers already familiar with the basics of TypeScript or JavaScript, who wish to deepen their knowledge of algorithms. It will be useful for:

• frontend and backend developers who want to write efficient code;
• students studying computer science and looking for practical examples in a modern language;
• those preparing for technical interviews (LeetCode, HackerRank);
• developers transitioning from other languages (Java, C#) to TypeScript.

What the reader will learn

After reading the book, the reader will be able to:

• implement a stack, queue, deque, linked list (singly linked, doubly linked);
• build and traverse a binary search tree, balanced tree (AVL, red-black);
• work with graphs (adjacency lists, matrices) and BFS/DFS algorithms;
• use hash tables and resolve collisions;
• choose the appropriate data structure for a specific task;
• write code that is easy to test and maintain thanks to TypeScript.

Strengths

The main advantage of the book is its practical focus. Each data structure is implemented from scratch, without using third-party libraries. This allows the reader to fully understand the internal workings. Additionally, the author pays attention to performance: Big O notation is provided for each operation. Another plus is modern syntax: async/await, iterators, generics. The book is written in simple language, with a large number of comments in the code.

Who it is recommended for

I recommend the book to anyone who wants to systematize their knowledge of data structures while working in the TypeScript ecosystem. It is suitable both for self-study and for use as a reference. The only wish is that the author could have added more problems from real interviews, but the current volume is sufficient for a confident start.