In this article, we will be discussing how to set up pin validation using JavaScript. We will cover topics such as creating a prompt for users to enter their pin number, validating the user's input against a stored value, and returning an appropriate response based on the result of the comparison. Data validation is the procedure used to make sure that the user input is accurate, reliable, and tidy. The user has entered a valid date, text in a numeric field, and all needed fields have been filled out, according to typical validation procedures. We can validate pin ... Read More

By using JavaScript’s native array methods and functions, we can easily create custom sorting algorithms that will work for any type of object. In this article, we will discuss how to use these techniques in order to sort an object's key-value pairs by value. A key-value pair in JavaScript such as maps, dictionaries stores one value (the "key") associated with another value (the "value"). It can be used to store and access data quickly, as each element has its own unique identifier. For sorting key value pair object based on the value, we use sort() method in JavaScript. ... Read More

In JavaScript, arrays are used to hold several values in a single variable. Compare that to a variable that only has room for one value. Each item in an array has a number associated with it that you may access by using, referred to as a numeric index. The task we will perform in this article is “How to iterate a JSON array in JavaScript”. Let's get started with the article to get a better understanding of iterating a JSON array. Iterating JSON array Ordered lists of values are represented by JSON arrays. Multiple values can be stored in a ... Read More

Comparing two arrays in JavaScript can be tricky when the key is a string. String comparisons are case-sensitive and require special handling to ensure proper results. Fortunately, there are several methods you can use to compare two arrays when the key is a string in JavaScript. In this article, we’ll discuss how to effectively compare two arrays with strings as keys using various approaches such as map(), Include(). Intersection() and Arrayfilter(). Strings in JavaScript are used to store and modify text. A string in JavaScript is defined as zero or more characters enclosed in quotations. Data that can ... Read More

To display value of textbox in JavaScript, it is used for checking real-time validity of user's input such as email format, password strength and many more. We will be understanding two different approaches in this article to display value of textbox in JavaScript. In this article, we are having a text box and a button, our task is to display value of textbox in JavaScript. Approaches to Display Value of Textbox Here is a list of approaches to display value of textbox in JavaScript which we will be discussing in this article with stepwise explanation and complete example codes. ... Read More

Let us learn about "how to replace spaces with underscores in JavaScript". This is a useful technique for formatting strings that contain multiple words, and can be used in many different situations. We'll look at some other ways of achieving the same result as well as potential pitfalls you should watch out for when working with underscores in your JavaScript code. JavaScript is a scripting language used to create appealing and engaging web pages for websites. The need to substitute specific letters for certain characters or extra spaces in the text does arise occasionally. The predefined JavaScript methods that ... Read More

An ordered group of indexed elements is represented by an array, which is a type of data structure. Merging two or more arrays to create a larger array that contains all the items from the original arrays is a typical operation done on multiple arrays. In JavaScript, there are several ways to add two arrays together and create a new array. This article, will go over how to properly use the concat() method, spread operator (...), to combine two separate arrays into one newly created array. Additionally, each of these methods will be discussed with examples so that you ... Read More

The TODO list is a list that typically used to keep track of all the things we need to do in a given day, with the most crucial chores at the top and the least important items at the bottom. We can use it to plan our everyday schedules. We have the flexibility to add new assignments to the list, as well as remove those tasks that have been completed. A TODO list can be used to complete the following four main tasks Add new task Delete task Mark task as completed Edit task Let’s look into the ... Read More

In JavaScript, there is a array method that allows you to easily extract data from an array and assign it to new independent variables. This can be useful when working with large datasets or when needing to access specific values within an array quickly. In this article, we will explore how to use the dot(.) notation, for pulling data from an array into new independent variables in JavaScript. Let us know, what is an Independent variable! An independent variable is a variable that stands alone and isn't influenced by any other variables. It can be manipulated or changed, and it ... Read More

Yes, the not not operator is the reverse process of not operator. If any value is true then single ! (not) will return false and !! will return opposite value (true).The not operator −var flag=true; console.log(!flag);The not not operator −var flag=true; console.log(!!flag);ExampleFollowing is the code −var flag=true; console.log("The result of single !=") console.log(!flag); console.log("The result of single !!=") console.log(!!flag)To run the above program, you need to use the following command −node fileName.js. Here, my file name is demo247.jsOutputThis will produce the following output on console −PS C:\Users\Amit\javascript-code> node demo247.js The result of single != false The result of single !!= ... Read More