Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Economics & Finance
A multidimensional JavaScript object is an object that contains other objects as properties, creating nested structures. This allows you to organize complex data hierarchically. Basic Syntax let multidimensionalObject = { property1: "value1", property2: { nestedProperty1: "nestedValue1", nestedProperty2: { deeplyNestedProperty: "deeplyNestedValue" } } }; Example: Creating a Student ... Read More
When building dynamic tables with JavaScript, it's important to validate user input and prevent NULL values from being inserted. This ensures data integrity and provides a better user experience. Understanding NULL Validation In JavaScript, we need to check for null, undefined, and empty strings before inserting values into a table. The basic condition structure is: while (!(variable1 == null || variable2 == null || variable3 == null)) { // Insert values only when none are null } Complete Example with Validation ... Read More
We are required to write a JavaScript function that takes in two strings, creates and returns a new string with first two characters of first string, next two characters of second string, then first, then second and so on. For example: If the strings are: const str1 = 'Hello world'; const str2 = 'How are you btw'; Then the output should be: 'HeHollw o arwoe rlyodu btw' Approach The algorithm alternates between the two strings, taking two characters at a time. When one string is exhausted, it appends the ... Read More
We are required to write a JavaScript function that takes in an array of numbers and sums all the identical numbers together at one index, removing duplicates while preserving the first occurrence position. For example, if we have repeated numbers in an array, we want to combine them into a single sum at the position where they first appear. Problem Statement If the input array is: const arr = [20, 10, 15, 20, 15, 10]; Then the output should be: const output = [40, 20, 30]; Here, 20 appears ... Read More
The tag is used in HTML to define a relationship to an external resource. It is most commonly used to link external style sheets to HTML documents. The tag is placed inside the section and is a self-closing tag, meaning it does not require a closing tag. Syntax Key Attributes The tag uses several important attributes: rel - Specifies the relationship between the current document and the linked resource href - Specifies the URL of the external resource type - Specifies the media type of the linked resource ... Read More
To add new value to an existing array in Javascript, it can be achieved using various ways. We will be understanding seven different approaches for adding a new element to existing array. In this article we are having an array of numbers and our task is to add new value to an existing array in JavaScript. Approaches to Add New Value to Existing Array Here is a list of approaches to add new value to an existing array in JavaScript which we will be discussing in this article with stepwise explanation and complete example codes. ... Read More
ClojureScript is a dialect of the Clojure programming language that compiles to JavaScript, allowing developers to use Clojure's functional programming paradigms in web browsers and Node.js environments. When building ClojureScript applications, proper exception handling is crucial for maintaining application stability and user experience. What is ClojureScript? ClojureScript is a compiler that transforms Clojure code into optimized JavaScript. Originally, Clojure only compiled to Java Virtual Machine bytecode, but ClojureScript emerged in 2011 to bring Clojure's powerful features to client-side development. ClojureScript operates at a higher abstraction level than JavaScript. While JavaScript deals with variables, loops, conditions, and objects, ... Read More
The onsearch event triggers when a user interacts with a search input field by pressing ENTER or clicking the "x" (clear) button. This event only works with elements and provides a convenient way to handle search operations. Syntax // Or using addEventListener element.addEventListener("search", myFunction); Example Here's how to implement the onsearch event to capture user search input: OnSearch Event Example Write what you want to search below and press "ENTER" or click the "x" to clear: ... Read More
The marginBottom property in JavaScript allows you to dynamically set the bottom margin of an element. This property is part of the element's style object and accepts values in pixels, percentages, or other CSS units. Syntax element.style.marginBottom = "value"; Where value can be in pixels (px), percentages (%), em units, or other valid CSS margin values. Example: Setting Bottom Margin Here's how to set the bottom margin of an element when a button is clicked: ... Read More
When users double-click on or near an HTML5 canvas element, browsers may inadvertently select surrounding text. This creates a poor user experience, especially in interactive applications. Here's how to prevent this behavior. The Problem Double-clicking near a canvas element can trigger text selection in surrounding elements, highlighting unwanted text and disrupting the user interface. Solution: Disable Text Selection Set the onselectstart event handler to return false, which prevents the browser from starting text selection on the canvas element. var canvas = document.getElementById('myCanvas'); // Prevent text selection on double-click canvas.onselectstart = ... Read More