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Articles on Trending Technologies
Technical articles with clear explanations and examples
How to check whether a checkbox is checked in JavaScript?
In this tutorial, we will learn to check whether a checkbox is checked in JavaScript. The checkbox is an input type in HTML that works as a selection box. Unlike radio buttons which allow users to select only one value from a group, checkboxes allow users to select multiple values. HTML can add checkboxes to webpages, but JavaScript is needed to add behavior based on whether checkboxes are checked or not. We'll learn to check both single and multiple checkboxes. Check if a Single Checkbox is Selected To check if a checkbox is selected, we access the ...
Read MoreIs their a JavaScript Equivalent to PHP explode()?
The JavaScript equivalent to PHP's explode() function is split(). Both functions break a string into an array based on a specified delimiter. Syntax string.split(separator, limit) Parameters separator: The character or string to split by (required) limit: Maximum number of splits (optional) Basic Example JavaScript split() Example var str = '087000764008:Rank:info:result'; var arr = str.split(":"); ...
Read MoreWhat is the correct use of schema.org SiteNavigationElement in HTML?
The schema.org SiteNavigationElement extends WebPageElement and is used to mark up navigation links on a webpage. It helps search engines understand your site's navigation structure and can enhance search result displays with sitelinks. Basic Syntax The SiteNavigationElement uses microdata attributes to define navigation properties: Link Text Key Properties The main properties used with SiteNavigationElement are: url - The destination URL of the navigation link name - The visible text or name ...
Read MoreChange the style of left border with CSS
The border-left-style property in CSS allows you to change the style of an element's left border. This property accepts various values like solid, dashed, dotted, double, and more to create different visual effects. Syntax border-left-style: value; Available Border Styles The border-left-style property accepts several values: solid - A single solid line dashed - A series of dashes dotted - A series of dots double - Two parallel lines groove - A 3D grooved border ridge - A 3D ridged border inset - A 3D inset border outset - A 3D outset border ...
Read MoreWrite a number array and add only odd numbers?
In JavaScript, you can sum only the odd numbers from an array by using the modulus operator (%) to check if a number is odd, then adding it to a running total. How It Works The modulus operator returns the remainder when a number is divided by 2. If the remainder is not equal to 0, the number is odd. Example: Summing Odd Numbers var tot = 0; var a = [1, 45, 78, 9, 78, 40, 67, 76]; ...
Read MoreHow to generate a random number in JavaScript?
JavaScript's Math.random() method is the built-in way to generate random numbers. It returns a floating-point number between 0 (inclusive) and 1 (exclusive), which can be scaled to any desired range. The Math.random() function returns a pseudo-random number in the range [0, 1) with uniform distribution. The implementation generates the seed automatically, and users cannot modify it. Basic Math.random() Usage Syntax Math.random() Return Value A floating-point, pseudo-random number between 0 (inclusive) and 1 (exclusive). Example Random Number Generation ...
Read MoreHow to remove every Nth element from an array JavaScript?
Removing every Nth element from an array is a common task in JavaScript. This can be accomplished using the Array.prototype.splice() method to modify the array in-place, or by creating a new array with the filtered elements. Method 1: Using splice() (In-Place Modification) The splice() method removes elements from the array and modifies the original array: const arr = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j']; console.log("Original array:", arr); const removeNth = (arr, n) => { // Start from n-1 index and remove every nth element ...
Read MoreThe best way to remove duplicates from an array of objects in JavaScript?
When working with arrays of objects in JavaScript, removing duplicates requires checking specific properties rather than comparing entire objects. Here are the most effective approaches. Sample Data Let's use this array of student objects with duplicate IDs: var studentDetails = [ {studentId: 101}, {studentId: 104}, {studentId: 106}, {studentId: 104}, {studentId: 110}, {studentId: 106} ]; console.log("Original array:", studentDetails); Original array: [ { studentId: 101 }, ...
Read MoreFinding tidy numbers - JavaScript
A tidy number is a number whose digits are in non-decreasing order. We are required to write a JavaScript function that takes in a number and checks whether its a tidy number or not. For example: 489 is a tidy number 234557 is also a tidy number 34535 is not a tidy number Understanding Tidy Numbers In a tidy number, each digit should be less than or equal to the next digit when reading from left to right. For instance, in 234789, we have 2 ≤ 3 ≤ 4 ≤ 7 ≤ 8 ≤ ...
Read MoreHow to get a decimal portion of a number with JavaScript?
In JavaScript, you can extract the decimal portion of a number using several methods. The most common approach is using the modulo operator (%) with 1. Using the Modulo Operator (%) The % operator returns the remainder after division. When used with 1, it gives the decimal part: var num1 = 5.3; var num2 = 4.2; var num3 = 8.6; document.write(num1 ...
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