Algorithms and Data Structures in JavaScript (Node.js)

The book "Algorithms and Data Structures in JavaScript (Node.js)" is a practical guide that will help developers of any level master the fundamental concepts of computer science using JavaScript and the Node.js environment. Unlike abstract textbooks, this book focuses on real-world tasks: you will learn not just to understand theory, but to effectively apply it in everyday development, optimizing application performance and scalability.

What is this book about?

The book covers a full range of topics — from simple data structures (arrays, lists, stacks, queues) to complex algorithms (graphs, trees, dynamic programming). Each chapter contains:

• Theoretical foundation — an explanation of how algorithms and data structures work with clear examples.
• Implementation in JavaScript (Node.js) — ready-to-run code that you can test immediately.
• Complexity analysis — breakdown of time and space complexity (Big O notation).
• Practical tasks — exercises to reinforce the material and real-world development scenarios.

Who is this book for?

• Beginner developers — those who want to systematize their knowledge and learn to write efficient code.
• Experienced JavaScript programmers — those looking for ways to optimize their projects and prepare for interviews.
• Students and teachers — as a practical guide for courses on algorithms and data structures.
• Node.js developers — those working on the server side and wanting to improve the performance of their applications.

What will you learn?

• How to implement and use basic data structures: arrays, linked lists, stacks, queues, hash tables, trees, graphs.
• How to apply sorting algorithms (quick sort, merge sort, built-in sort) and search algorithms (linear, binary, BFS, DFS).
• How to work with recursion, memoization, and dynamic programming to solve complex problems.
• How to optimize code using Node.js asynchronous patterns and the event loop.
• How to prepare for technical interviews — analysis of typical problems and methods for solving them.

This book will become your reliable companion in the world of algorithms and data structures, whether you are writing microservices on Node.js, creating web applications, or simply want to level up your programming skills.