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HTTP 1.1 vs HTTP 2

HTTP 1.1 vs HTTP 2 Introduction: HTTP (Hypertext Transfer Protocol) is the underlying protocol that powers the World Wide Web. It is a request-response protocol that enables communication between clients and servers. Over the years, HTTP has evolved and seen several versions. The two most widely used versions of HTTP are HTTP1.1 and HTTP2. In this blog, we will explore the differences between HTTP1.1 and HTTP2. Multiplexing: One of the significant differences between HTTP1.1 and HTTP2 is that HTTP2 supports multiplexing, while HTTP1.1 doesn't. Multiplexing allows multiple requests and responses to be sent and received concur

Understanding the Difference Between Document and Window Objects

JavaScript Object Introduction: When it comes to building websites, knowing the difference between Document and Window objects in JavaScript is important. These objects work together to make web pages interactive, but they have distinct roles. In this blog, we'll explore what Document and Window objects do and how they differ from each other, and we'll provide code snippets to illustrate their functionalities. Document Object: The Document object represents the web page itself. It lets you access and change the content and structure of the page. When you want to interact with the elements on a page using JavaScript, you'll be working with the Document object. Key features of the Document object include:

Mastering Git: The Ultimate Guide to Version Control with VSCode

Introduction: In the world of software development, efficient collaboration, and seamless version control are essential for successful project management. Git, a distributed version control system, has revolutionized the way developers work by providing a robust and flexible solution. In this blog post, we will explore the fundamentals of Git, its significance in modern software development, and how to leverage Git commands using the popular IDE, Visual Studio Code (VSCode). What is Git and Why is it Used? Git is a free and open-source distributed version control system designed to handle everything from small to large projects with speed and efficiency. It allows multiple developers to work on the same project simultaneously, providing seamless integration and a structured approach to managing changes. Git offers several key benefits, including: Distributed Version Control: Each developer has a complete copy of the project's history, enabling them to work offline and independentl

Understanding How Websites Work and How HTML, CSS, and JavaScript Contribute

Introduction: In today's digital age, websites have become an integral part of our lives. From simple blogs to complex e-commerce platforms, websites have revolutionized the way we interact, communicate, and conduct business online. Behind the scenes, three fundamental technologies play a crucial role in the creation and functionality of websites: HTML, CSS, and JavaScript. In this blog post, we will delve into the workings of websites, exploring the role of each of these technologies and how they contribute to the overall web experience. HTML: The Structure of the Web: HTML (Hypertext Markup Language) forms the backbone of web pages. It is a markup language that defines the structure and content of a webpage. HTML uses tags to enclose various elements, such as headings, paragraphs, images, links, and more. These tags provide a structure and meaning to the content, allowing web browsers to interpret and display them correctly. For example, a simple HTML structure for a webpage migh

Evaluating Postfix expressions in JavaScript

Question: Postfix expression evaluation A string containing the postfix expression is given to you. Evaluate it and print the single integer giving the answer. Input Description: The first line of the input is a string N, containing operators and numbers separated by a single space which forms a postfix expression. Output Description: Evaluate the post expression and print the result. Sample Input: 5 3 1 * + 9 - Sample Output: -1 Answer: Steps to evaluate a prefix expression: Split the prefix expression based on space (" ") or blank string ("") as per the given input. Store the split characters in an array. Create an evaluation array with no elements (blank array). Iterate through the elements of the characters array. If the character is a number, simply push the character into the evaluation array. if the character is an operator (+, -, *, /, %), then pop 2 elements from the evaluation array. Store the first popped number as the right Operand and the second as t

Evaluating Prefix expressions in JavaScript

Question: Prefix expression evaluation A string containing the prefix expression is given to you. Evaluate it and print the single integer giving the answer. Input Description: You are given a string ‘s’. Output Description: Print the evaluated answer of that string. Sample Input: +23 Sample Output: 5 Answer: Steps to evaluate a prefix expression: Split the prefix expression based on space (" ") or blank string ("") as per the given input. Store the split characters in an array and reverse the array. Create an evaluation array with no elements (blank array). Iterate through the elements of the characters array. If the character is a number, simply push the character into the evaluation array. if the character is an operator (+, -, *, /, %), then pop 2 elements from the evaluation array. Store the first popped number as the left Operand and the second as the right Operand. Calculate the result using the operands and current operator. [left operand (operator) righ

Find All Permutations of any number in JavaScript.

Question: Given a string S of length N. Print all permutations of the string in separate lines. Input Size: 1 <= N <= 100000 Sample Testcases : INPUT: 123 OUTPUT: 123 231 321 213 312 132 Answer: Steps to find all permutations of any number: We are going to use Recursion for calculating the permutations. Create a method called "getPermutations", and create a Permutations array inside the method that will hold all the permutations. Let's start with the base condition (Where the recursion stops). The base condition will be when the number has only one digit simply add it to the permutations array and return the array. If the number has more digits, then iterate through all the digits. On each iteration, find the current digit (store it in one variable) and find all other digits (store it in another variable). Call the recursive function "getPermutations" and pass the other digits variable created in the above step. We will expect this to return an array of

JavaScript Basics

Writing a program in JavaScript: Syntax: the rules to write code Logic: the code to process data Input: the data given for processing Output: the processed data Printing a string in console: console.log("Hello World"); JavaScript Identifier: Identifier is a name that we give to any reference (for variables, constants, functions, etc.) Any existing JavaScript keyword can not be an identifier. The first letter of an identifier must be either a letter (A-Z, a-z) or an underscore (_), or a dollar sign ($). The rest of the characters can be letters, digits, underscore, or dollar signs. JavaScript variables: JavaScript variables can be defined using 2 keywords. "var" and "let". var identifierName = "Hello"; let identifierName = "Hello"; Difference between var and let: The term "let" was introduced in ES6 (ECMAScript 6) with additional features. The first difference is the scope of the variable. Variables defined as var will have glo