VD

Software Engineer

[Matt Pocock @mattpocockuk]

Article:

https://t.co/SmoPZzLSAo

[VD @vishamberbdas]

Looking to learn how to code?

This blog post is packed with great advice and practical tips to help you get started on your coding journey. Don't miss out! 🌟 Check it out here: https://t.co/hBSQWwjlYs

#Coding #javascript

[VD @vishamberbdas]

5/ Why It’s Important?

Abstraction: Standardizes the way requests and events are handled across platforms.

Reusability: Simplifies writing reusable logic in Guards, Interceptors, and Pipes.

Flexibility: Enables platform-specific behavior when needed.

[VD @vishamberbdas]

1/ What is Execution Context in NestJS?

The Execution Context is a powerful abstraction in NestJS that provides insights about the current request/event lifecycle. It acts as a bridge between platform-specific implementations(HTTP, WebSocket, etc.)and application logic.

#Nestjs

[VD @vishamberbdas]

4/ Key Utility Functions

Switching Context:
- ctx.switchToHttp() for HTTP-specific access
- ctx.switchToWs() for WebSocket access
- ctx.switchToRpc() for gRPC calls

Handler Details:
- Use ctx.getHandler() to retrieve the current method
- Use ctx.getClass() to get the controller

[VD @vishamberbdas]

✨Ever wondered what executes before a route handler in #NestJS? Here's the flow:
1️⃣ Middlewares – Preprocess requests
2️⃣ Guards – Handle access control
3️⃣ Interceptors – Transform requests/responses
4️⃣ Pipes – Validate and transform data
Clean, modular, and powerful! 🚀 #NodeJS

[VD @vishamberbdas]

Differences

Express: Minimal, flexible, setup-free; best for smaller, custom apps
Nest.js: Opinionated, modular, CLI-driven with dependency injection, TypeScript-first; ideal for scalable, structured apps.

Nest.js= Express+structure & tools for complex projects! #NodeJS #NestJS

[VD @vishamberbdas]

Express vs. Nest.js 🌐

Similarities:

1. Both are Node.js frameworks for building server-side apps.
2. Both support TypeScript (Nest.js natively, Express with config).
3. Both can be used to build REST APIs, MVC, or microservices.

#NestJS #NodeJS #ExpressJS

[VD @vishamberbdas]

That’s the power of Object.freeze() and deepFreeze in JavaScript! Keep your data locked and consistent 🔒
Happy coding! 🚀
#JavaScript

[VD @vishamberbdas]

Ever needed to make data truly unchangeable in JavaScript? 🔒 That’s where Object.freeze() comes in! It prevents modifications to an object or array, perfect for constants or settings. Here’s how it works…
#JavaScript

[VD @vishamberbdas]

With deepFreeze, you can ensure immutability in complex structures! 🚫🔄
✨ Use it for data integrity when working with deeply nested configurations or constants. Just remember: this is best for data that truly needs to stay unchangeable! #JavaScript

[VD @vishamberbdas]

@Sanjay_Gouda_13 @davidm_ml It looks amazing

[VD @vishamberbdas]

Excited for Nodejs 23!!
Nodejs 22 version will be promoted to LTS in last week of October🔥

[Node.js @nodejs]

🚀 Node.js 23 is here! 🚀

New features, performance boosts, and a smoother developer experience. With better compatibility and stability, Node.js 23 delivers more power for building efficient apps.

Read here: 👉https://t.co/eQPMJSOuPH

#NodeJS #JavaScript #WebDevelopment

[VD @vishamberbdas]

6/6 🔍 When to Use:

call() and apply() are used to immediately invoke a function with a specified this value.
bind() is used to create a new function that permanently binds this to a specific object, allowing you to call it later.

[VD @vishamberbdas]

📌 Understanding call(), apply(), and bind() in JavaScript:

1/6 🧑‍💻 Ever wondered how to control the this context in JavaScript functions?

Here's where call(), apply(), and bind() come in handy! Let's break them down.👇

#javascript

[VD @vishamberbdas]

5/6 💡 Key Differences:

call(): Invokes function with this and individual arguments.
apply(): Invokes function with this and array of arguments.
bind(): Returns a new function with this, to be called later.