JavaScript

JavaScript Interview Questions

What are the benefits of using spread syntax and how is it different from rest syntax?

In JavaScript, the spread syntax and rest syntax are both used to manipulate arrays and objects. The spread syntax allows you to expand an array or an object into its individual elements or properties. Continue reading

JavaScript How To

How to use the parseInt and parseFloat functions in JavaScript to convert strings to numbers

The parseInt() and parseFloat() functions in JavaScript are used to convert strings to integers and floating-point numbers, respectively. These functions can be helpful when you need to perform arithmetic operations on data that is stored as a string. Continue reading

JavaScript

How to use the Array.isArray function in JavaScript to check if a value is an array

In JavaScript, you can use the Array.isArray() function to check if a value is an array. This function returns a Boolean value indicating whether the provided value is an array or not. Continue reading

JavaScript Interview Questions

In JavaScript, what is destructuring?

Destructuring in JavaScript is a feature that allows you to extract data from arrays or objects and assign them to variables. This can be done using a shorthand syntax, making it easy to extract specific values from an array or object and assign them to individual variables. Continue reading

JavaScript How To

How to use the Array.join method in JavaScript

The Array.join method in JavaScript is a built-in method used to join all elements of an array into a string. It returns a string representation of the array, where the elements are separated by a specified separator or by a comma by default. Continue reading

JavaScript

Understanding the difference between call and apply in JavaScript and how to use each

In JavaScript, the call() and apply() methods are used to call a function with a specified this value and arguments. These methods are similar, but they have a few key differences that are important to understand. Continue reading

JavaScript

Understanding variables in JavaScript and how to use them

Variables are an essential concept in programming, and JavaScript is no exception. Variables allow you to store and manipulate data in your code, making it easier to work with large amounts of data and perform complex tasks. Continue reading

JavaScript Interview Questions

In Javascript, what's the difference between a variable that is: null, undefined or undeclared?

In JavaScript, understanding the difference between a variable that is null, undefined, or undeclared is crucial for writing efficient and maintainable code. These terms may seem similar, but they have distinct meanings and use cases. Continue reading