Javascript · CoreUI

Understanding the difference between `for...in` and `for...of` statements in JavaScript

Friday, December 6, 2024

As JavaScript continues to evolve, understanding the nuances of its looping mechanisms becomes essential for developers aiming to write efficient and bug-free code. Two commonly used looping statements, for...in and for...of, often lead to confusion due to their overlapping use cases. Grasping the difference between these loops is crucial for iterating over objects and iterable objects effectively, ensuring optimal performance and maintainability in your codebase.

How to sort an array of objects by string property value in JavaScript

Łukasz Holeczek

Tuesday, November 19, 2024

#how-to #javascript

Sorting an array of objects by a string property value is a common task in JavaScript development. Whether you’re working with user data, product listings, or any other complex data structures, understanding how to sort arrays effectively can enhance your applications’ functionality and user experience. In this article, we’ll explore various methods to sort an array of objects by a string property value in JavaScript, utilizing the powerful sort method and custom comparison functions.

How to convert a string to boolean in JavaScript

Łukasz Holeczek

Wednesday, November 13, 2024

#how-to #javascript

Working with different data types is a common task in JavaScript development. One frequent requirement is to convert a string to a boolean value. This article explores various methods to achieve this conversion, ensuring your code handles truthy values and false conditions accurately.

How to validate an email address in JavaScript

Łukasz Holeczek

Friday, September 20, 2024

#how-to #javascript

In web development, ensuring that user input is formatted correctly is crucial for maintaining data integrity and enhancing user experience. One common requirement is email validation. Implementing email validation in JavaScript allows developers to provide immediate feedback to users, ensuring that the email addresses entered are valid and correctly formatted. In this guide, we’ll explore how to implement email validation in JavaScript, using regular expressions and other techniques to validate email addresses effectively. We will also provide practical examples and methods using JavaScript code that you can directly copy and paste.

What is the difference between typeof and instanceof in JavaScript

Łukasz Holeczek

Tuesday, September 17, 2024

#what-is #javascript

difference between typeof and instanceof

As a JavaScript developer, you might often wonder how to correctly identify the type of a variable or determine if an object belongs to a particular class. Two operators that help with this are typeof and instanceof. While they may seem similar, they serve different purposes and work in distinct ways. This article will break down these operators, explain their differences, and guide you on when to use each.

What are the three dots `...` in JavaScript do?

Łukasz Holeczek

Tuesday, September 3, 2024

#how-to #javascript

In JavaScript, the three dots operator (...) is a versatile feature introduced in ES6. Known as the spread operator and rest parameter, these three dots have transformed how developers handle arrays, objects, and function parameters. Understanding this syntax is crucial for any software developer looking to write clean, efficient, and maintainable code. In this article, we’ll explore the various ways you can use the spread operator, spread syntax, and rest operator in your JavaScript code.

How to replace all occurrences of a string in JavaScript?

Łukasz Holeczek

Saturday, August 31, 2024

#how-to #javascript

When working with JavaScript, you often must replace all occurrences of a specific substring within a string. This is a common task in various scenarios, such as formatting user input, modifying text content, or processing data. However, the native replace method in JavaScript only replaces the first occurrence of the pattern by default. This article will guide you through different techniques to replace all occurrences of a string in JavaScript effectively.

How to remove a property from an object in Javascript

Łukasz Holeczek

Wednesday, August 28, 2024

#how-to #javascript

In JavaScript, working with objects is a fundamental part of building applications. Often, you may need to remove properties from an object, whether it’s for cleaning up data or preparing an object for a specific use case. This article explores various techniques for removing properties from a JavaScript object, discussing the advantages and potential pitfalls of each method. We’ll also cover how to remove multiple properties from a single object efficiently.

The Wacky World of JavaScript: Unraveling the Oddities

Łukasz Holeczek

Tuesday, August 20, 2024

#how-to #javascript

JavaScript, the ubiquitous language of the web, is known for its flexibility and, at times, its perplexing behavior. Let’s dive into some of the more peculiar aspects of JavaScript that can leave both novice and experienced developers scratching their heads.

How to loop through a 2D array in JavaScript

Łukasz Holeczek

Saturday, August 3, 2024

#how-to #javascript

javascript how to loop through a 2 dimensional array

In JavaScript, a two-dimensional (2D) array is an array of arrays. It’s often used to store data in a tabular form. Traversing these arrays efficiently is crucial for many software development tasks. This article covers various methods to loop through a 2D array in JavaScript, offering examples to demonstrate each technique.