When working with JavaScript and CSS, one of the fundamental concepts you need to grasp is how to select and manipulate HTML elements on a webpage. To do this effectively, you must understand the distinctions between using classes, IDs, and elements. In this article, we will explore these three selectors, providing examples to help you […]
Author: anujsharma
Guide to Using for…of and for…in Loops in JavaScript
Introduction In JavaScript, for…of and for…in loops are powerful tools for iterating through elements in arrays, properties in objects, or elements in iterable data structures. These loops provide a more convenient way to traverse data compared to traditional for loops. In this guide, we will cover the basic syntax of for…of and for…in loops, provide […]
Choosing the Right JavaScript Variable Declaration: var, let, or const
In JavaScript, var, let, and const are used to declare variables, but they behave differently in terms of scope and mutability. Understanding the differences between them is crucial for writing clean and bug-free code. var Example: When to Use var: You should avoid using var in modern JavaScript because it has unpredictable scoping behavior and […]
Guide to Writing For Loops in JavaScript
Introduction In JavaScript, a “for” loop is a control structure that allows you to repeatedly execute a block of code for a specific number of iterations. For loops are especially useful when you know in advance how many times you want to repeat a task. In this guide, we will cover the basic syntax of […]
Guide to Writing While Loops in JavaScript
Introduction In JavaScript, a “while” loop is a control structure that repeatedly executes a block of code as long as a specified condition evaluates to true. This loop is useful when you want to repeat a task until a particular condition becomes false. In this guide, we will cover the basic syntax of a while […]
Database Normalization for Beginners: Understanding the Key Concepts and Benefits
Database normalization is a fundamental concept in the world of databases that plays a crucial role in designing efficient, scalable, and maintainable database structures. It is a process of organizing data in a relational database to eliminate data redundancy and improve data integrity. Normalization ensures that the data is structured logically and optimizes the database […]
Abstraction in Python Classes
Introduction: Abstraction is an important concept in object-oriented programming that allows you to hide the internal details of a class and expose only the relevant information to the outside world. In Python, abstraction is achieved using abstract classes and abstract methods. In this tutorial, we will explore abstraction in Python classes and provide examples to […]
Steps to calculate time and space complexity in recursive function
Calculating the time and space complexity of a recursive function involves a systematic approach. Here are the steps you can follow to calculate the complexity: Let’s walk through an example to calculate the time and space complexity of a recursive function. Consider the following recursive function in Python that calculates the nth Fibonacci number: def […]
How to approach unit testing in a React application
Introduction React testing is an important part of building and maintaining React applications. The tools we’re going to use are: First, you need to install Jest and React Testing Library. Here’s how you do it with npm: Writing Your First Test Let’s say you have a simple component like this: To test this component, you […]
Space complexity
Space complexity refers to the amount of memory an algorithm needs to run to completion. The need for space can be attributed to variables, data structures, function calls, and allocations, etc. To determine space complexity, we consider both the fixed space requirements and the variable space requirements. The total space requirement is the sum of […]