Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
Javascript Articles
Page 136 of 534
Remove duplicate items from an array with a custom function in JavaScript
In this problem statement our aim is to write an algorithm to remove duplicate items from an array with a function with the help of Javascript functionalities. Understanding the problem statement In the above problem statement we have to create a function by which we can accept an array as a parameter and give a new array to store the unique items from the given input array and without including the identical values. For example - suppose we have an array as [0, 0, 2, 2, 3, 3] so after removing the duplicate numbers we will have ...
Read MoreHow to use named arguments in JavaScript functions?
In this article, we will learn how to use named arguments in javascript, and how we can use it to significantly enhance code readability and maintainability. Javascript allows us to use named arguments, which eliminate the need for the order of parameters to matter during function execution. We may then access the arguments by name inside the function definitions. Let’s look at some of the examples and methods to understand the concept better − Example 1 - Passing Objects as Arguments We can pass an object as an argument to the function to achieve named−argument functionality. This uses the ...
Read MoreExports & Imports in JavaScript
We will learn how to utilise imports and exports in javascript in this post, as well as how to use them to break our code into different modules in order to better organise it. To facilitate modular development in programming, which enables us to organise our code into reusable modules, JavaScript provides exports and imports. To achieve this sharing and reusability of code, we can use different types of exports and imports. Exports allow us to make functions, variables, objects, or any values available outside of a module. By marking components as exports, we can expose them for use in ...
Read MoreHow to read a cookie using JavaScript?
In this article, we will learn how to read cookies in javascript, and how we can use it to implement certain features such as user tracking, user preference, personalized experience, etc. Cookies are small pieces of data stored in a user's web browser. In javascript, we can read cookies using document's cookie property and extract the desired information using destructuring. Let’s look at some of the examples to understand the concept better − Example 1 - Reading All Cookies In this example, we will − read all cookies by accessing the document.cookie property and log them to the console. ...
Read MoreFunction returning another function in JavaScript
In JavaScript, functions can be assigned to any variables, they can be passed as arguments to other functions, and can even be returned from other functions. This behavior of functions allow us create HOCs in javascript, which are functions that return other functions. These higher−order functions can be used in various applications like callback functions, function memoization, or transformation, etc. In this article, we will learn functions returning another function, aka higher−order functions in javascript, and how we use them to implement certain javascript features like callbacks, array/object filtering and transformations, etc. Let’s look at some of the examples to ...
Read MoreHow to convert Array to Set in JavaScript?
This tutorial will teach you how to eliminate duplicate values from an array of items in Javascript by converting an array to a set. When storing distinct values from a collection of data in javascript, we can utilise the Set data structure to get rid of duplicate values. When we wish to eliminate duplicates from our data or take advantage of the special features offered by Sets data structure, converting an array to a Set can be helpful. Let’s look at some of the examples and methods to understand the concept better − Example 1 - Using the Set Constructor ...
Read MoreHow to add delay in a loop in JavaScript?
Loops are used in JavaScript to repeat actions or iterate over a piece of data. With the aid of various techniques, we can add a delay between each iteration of the loop in order to regulate the speed of execution or produce particular temporal effects. This article will teach you how to include a delay in a java script loop and how to use it to delay the execution of a specific piece of code that is running inside one. Let’s look at some of the examples to understand the concept better − Example 1 - Using setTimeout() In the ...
Read MoreProgram to check/uncheck checkboxes using JavaScript
We will learn how to check or uncheck checkboxes in javascript in this article, and how we can use it to allow users to make multiple selections on the web page Checboxes are one of the most used HTML elements in forms and user interfaces that allow users to pick numerous options. In JavaScript, we can dynamically check or uncheck checkboxes based on certain conditions or user interactions. Let’s look at some of the examples to understand the concept better − Example 1 In this example, we will − We will create 3 different checkboxes, a checkAll() and ...
Read MoreHow to toggle a boolean using JavaScript?
In this tutorial, we will learn how to toggle a boolean value in javascript. In addition to this, we will also learn how we can use it for various web application features that require toggling a certain piece of state or value. Toggling a boolean in JavaScript entails altering its value from true to false or vice versa. Toggling booleans can be helpful in a variety of situations, such as changing a boolean value to initiate an action or to toggle between states or the visibility of an element. Toggling can be implemented using different methods like the NOT operator, ...
Read MoreCreating auto-resize text area using JavaScript
In this post, we are going to learn how to set up an auto−size text area in JavaScript. This text area will be able to change its height automatically depending on the content within it. Auto−size text in JavaScript is a helpful feature that can be used to edit multiple lines of text. The text can automatically change its height depending on the content inside it. The default behavior of textarea doesn’t allow this, but we can create it by using the input event listener over it. Let’s understand how to adjust the height of the text area element dynamically ...
Read More