Neeraj Sharma codeWithNks

Kafka

Knowledge
- Node.JS Intermediate level
- Experience with designing distributed systems
Tools
- Node.js: Download Node.JS
- Docker: Download Docker
- VsCode: Download VSCode

Named Export:
- Definition: Exports specific variables or functions by their names.
- Usage: You import them using the same name in another file.
- Example:

Definition: A microservice is an independent, self-contained service that handles a specific function of an application.
Key points:
- Each microservice runs on its own.
- Services communicate with each other through APIs.
- It can be scaled or updated independently.
Example: An e-commerce platform with separate microservices for user management, product catalog, and payment processing.

No, JSX is not mandatory, but it is widely used for its readability and simplicity.

Without JSX:

React.createElement('h1', null, 'Hello World');

Syntax	Description	Example	Is Content Rendered?	Output/Behavior	Use Case
`{TitleComponent}`	Refers to the component itself (not its output). This is used for passing or referencing the co

A package manager for JavaScript.
Manages libraries, tools, and dependencies.
Comes with Node.js.
Key commands:
- npm install [package]: Install a package.
- npm init: Create a package.json file.
- npm run [script]: Run custom scripts from package.json.

Here’s how you can use npx with Parcel, a popular web application bundler, without needing to install it globally.

You want to bundle a JavaScript file using Parcel, but you don’t want to install it globally.

npx parcel index.html

Allows patch-level updates but keeps the minor and major versions fixed.
It’s strict about not allowing any changes to the minor or major versions.

Sure, I'll explain these concepts with code examples where applicable.

What is Emmet? Emmet is a plugin for text editors that allows you to write abbreviations and then expand them into full-fledged HTML, CSS, and even JavaScript code. It saves time and improves productivity by reducing the amount of code you need to write manually. Here's an example:

<!-- Emmet abbreviation -->
nav>ul>li*5>a

	const NUM_VIRTUAL_NODES = 3; // Number of virtual nodes per physical server

	// Extending ConsistentHashing to add virtual nodes
	class ConsistentHashingWithVirtualNodes extends ConsistentHashing {
	// Overriding the addServer method to add virtual nodes
	addServer(serverId) {
	// For each physical server, create multiple virtual nodes
	for (let i = 0; i < NUM_VIRTUAL_NODES; i++) {
	const virtualNodeId = `${serverId}#${i}`; // Virtual node is a combination of the server ID and index
	super.addServer(virtualNodeId); // Add virtual node to the ring