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· 5 min read
Sivabharathy

Understanding Digital Signatures: A Comprehensive Guide to nilajs-digital-signature Library​

Digital signatures are essential tools in the modern world of digital communication and transactions. They provide a way to verify the authenticity and integrity of digital messages or documents. In this article, we will explore the nilajs-digital-signature library, which offers a simple yet powerful way to generate elliptic curve (secp256k1) key pairs, sign data, verify signatures, and validate public keys.

What is a Digital Signature?​

A digital signature is a cryptographic mechanism that serves two main purposes:

  1. Authentication: It verifies that a message was created by a particular entity, ensuring the identity of the sender.
  2. Integrity: It ensures that the message has not been altered or tampered with since it was signed.

By using digital signatures, we can achieve a higher level of security and trust in digital communications.

· 4 min read
Sivabharathy
**Lazy Minting in NFTs: An Itemized Exploration**

In the quickly developing scene of blockchain innovation and computerized resources, Non-Fungible Tokens (NFTs) have arisen as a huge development, empowering exceptional proprietorship and provenance check of advanced content going from craftsmanship and music to virtual land and then some. One of the captivating techniques inside the domain of NFT creation and dissemination is "lazy minting." This approach presents adaptability and vital command over the arrival of NFTs, veering from customary strategies where all tokens in an assortment are printed all the while.

· 8 min read
Sivabharathy

What is NestJS?​

NestJS is an ever-evolving Node.js (strong essential design on which greater things can be worked) for building (delivering a ton with very little waste), dependable, and (ready to be made greater or more modest) server-side PC programs. It is worked with and completely upholds TypeScript, while as yet permitting engineers to compose code altogether/absolutely/with nothing else blended in JavaScript. NestJS is intensely given good thoughts from Thin (so you can see bones)/having points and exploits its particular (connected with the wonderful plan and development of structures, and so on) to support the advancement of reusable, testable, and viable parts/pieces.

· 4 min read
Sivabharathy
### Docker and Docker Compose Cheatsheet

Docker Commands​

  1. Docker Basics

    • docker --version: Check Docker version.
    • docker info: Display system-wide information.

  2. Images

    • docker images: List all images.
    • docker pull <image>: Download an image from a registry.
    • docker build -t <name>:<tag> .: Build an image from a Dockerfile in the current directory.
    • docker rmi <image>: Remove an image.

· 9 min read
Sivabharathy
# A Comprehensive Guide to HTML5: Cheat Sheet and Explanations

HTML5 is the latest evolution of the standard that defines HTML, a language used for structuring and presenting content on the web. This guide provides an extensive cheat sheet for HTML5, explaining various elements, their attributes, and usage. Whether you're a beginner or looking to refresh your knowledge, this guide covers the essential HTML5 tags and their functionalities.

Document Structure and Information​

Document Declaration​

<!DOCTYPE html>

· 6 min read
Sivabharathy
# Getting Started with Express.js: A Comprehensive Guide for Beginners

Express.js is a flexible and minimal web application framework for Node.js that provides robust features for building web and mobile applications. In this guide, we'll cover the basics of using Express.js, including installation, global objects, application properties, request and response handling, and body parsing.

Setting Up Express.js​

Step 1: Installing Express​

You can install Express using either npm or yarn. Here are the commands for both:

Using npm:

npm install express --save

· 4 min read
Sivabharathy

Git for Absolute Beginners: A Comprehensive Guide with Clear Examples

Git is a powerful version control system that allows multiple people to work on a project simultaneously, keeps track of changes, and facilitates collaboration. If you're new to Git, don't worry! This guide will walk you through the basics with clear, step-by-step examples.

What is Git?​

Git is a distributed version control system designed to handle everything from small to very large projects with speed and efficiency. It allows you to:

  • Track changes in your code
  • Revert to previous versions
  • Collaborate with others

· 4 min read
Sivabharathy

To perform a complete search across all fields in a MongoDB collection using Mongoose, you can leverage MongoDB's powerful querying capabilities. While MongoDB does not natively support searching across all fields in a single query without specifying field names, you can implement a solution by dynamically building queries based on the schema's fields.

· 5 min read
Sivabharathy

Comprehensive Guide to MongoDB Search and Schema Design​

MongoDB, a leading NoSQL database, is renowned for its flexibility, scalability, and powerful querying capabilities. Understanding how to effectively design schemas and utilize MongoDB’s search features is essential for leveraging its full potential. This article provides a comprehensive guide to MongoDB search and schema design.

Introduction to MongoDB​

MongoDB stores data in a flexible, JSON-like format called BSON (Binary JSON). This format allows for a dynamic schema, enabling documents within a collection to have varying structures. Such flexibility makes MongoDB an ideal choice for applications requiring rapid development and iterative schema design.

· 4 min read
Sivabharathy

Mongoose provides a powerful way to model relationships between documents in your MongoDB collections. Here's an explanation of Mongoose populate with examples for one-to-one, one-to-many, and many-to-many relationships:

1. One-to-One Relationship:

This represents a scenario where a document in one collection can have a reference to at most one document in another collection. Here's an example:

  • User Schema:
const mongoose = require('mongoose');

const userSchema = new mongoose.Schema({
  name: String,
  profile: {
    type: mongoose.Schema.Types.ObjectId,
    ref: 'Profile' // Reference to the Profile model
  }
});

module.exports = mongoose.model('User', userSchema);

About me

I am a Software Engineer and Lead Project Manager at Sparkout Tech Solutions Pvt Ltd. I enjoy turning complex problems into simple, beautiful, and intuitive solutions.

I occasionally build some open-source software for myself, stock trader and an avid football player and cricket fan.

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