Node.js Learning Journey & Mini Project

This repository documents my journey of learning Node.js and applying it through a small project.
The goal was to understand Node.js fundamentals, practice core modules, and build a reusable event-driven file manager.

---

📚 Topics Learned

1. Hello World Server

• Learned how to create a simple server using Node.js.
• Understood the basics of handling requests and sending responses.
• Explored how servers listen on ports and serve content.

2. Filesystem (Promise API)

• Practiced reading, writing, appending, renaming, and deleting files.
• Used the fs/promises module for cleaner asynchronous code with async/await.
• Built confidence in handling file operations in a non-blocking way.

3. Buffers

• Learned how Node.js handles raw binary data.
• Explored how buffers store and manipulate data beyond plain strings.
• Practiced converting buffers back into readable formats.

4. Number Systems

• Converted numbers into different representations (binary, hexadecimal, decimal).
• Understood how Node.js supports various number systems for low-level operations.

5. Networking

• Learned the basics of TCP and HTTP servers.
• Explored how Node.js makes networking simple with built-in modules.
• Practiced creating a simple TCP server for sending and receiving messages.

6. Monitoring

• Explored Node.js process monitoring and lifecycle events.
• Learned how to listen for process-level events such as startup, exit, and errors.
• Understood the importance of monitoring for debugging and stability.

7. EventEmitter

• Learned the event-driven architecture of Node.js.
• Understood how to emit and listen to custom events.
• Applied EventEmitter to make code modular and reusable.

---

🛠️ Mini Project — File Manager with Events

I built a small File Manager project that allows creating, reading, updating, renaming, and deleting files.

• The project uses the Promise-based File System API for operations.
• A text file acts as an input source that specifies which action to perform.
• The EventEmitter listens for a "change" event and triggers the corresponding file operation.
• This design improves reusability and follows the event-driven pattern of Node.js.

---

🎯 Key Takeaways

• Node.js is built on an event-driven, non-blocking I/O model, making it fast and efficient.
• Using promises simplifies working with asynchronous tasks.
• Buffers and number systems help in low-level operations.
• Networking is straightforward with built-in TCP and HTTP modules.
• Events make Node.js applications highly modular and maintainable.

---

▶️ How to Run This Project

1. Clone the repository.

2. Make sure Node.js (v18 or higher) is installed.

3. Run the examples or the mini project using:

   node filename.js