What is Freelancing?​

Freelancing refers to the practice of individuals offering their skills and services to clients on a project or contract basis, rather than working as employees for a single employer. Freelancers operate as independent contractors, and they can work for multiple clients simultaneously. Freelancing provides flexibility in terms of work hours, location, and the types of projects undertaken.

Building a Single-Node Blockchain Library with Nodejs, ExpressJS and LevelDB

Introduction​

In the ever-evolving world of blockchain technology, creating your own blockchain can seem like a daunting task. However, with the right tools and libraries, it can be simplified significantly. This article will walk you through the features, installation, usage, and development process of a blockchain library that provides core blockchain functionality accessible via REST APIs and stores data using LevelDB. The current release supports a single-node blockchain feature.

Features​

Our blockchain library comes packed with essential features to get you started with blockchain development:

• Core Blockchain Functionality: The library exposes fundamental blockchain operations via REST APIs.
• Data Persistence: Utilizes LevelDB to store blockchain data, ensuring durability and efficient data retrieval.
• Single-Node Blockchain Implementation: Ideal for learning and testing blockchain concepts on a single node.

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.

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.

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.

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.

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>

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

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

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.