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Articles on Trending Technologies
Technical articles with clear explanations and examples
How to get a number of days in a specified month using JavaScript?
To get the number of days in a specified month in JavaScript, you can use the Date constructor with a clever trick: create a date for the first day of the next month, then subtract one day to get the last day of the target month. The Date Constructor Trick The key insight is that new Date(year, month, 0) returns the last day of the previous month. Since JavaScript months are zero-indexed (0 = January, 1 = February, etc.), passing the actual month number gives us the last day of that month. Basic Implementation ...
Read MoreHow to layout table cells, rows, and columns with JavaScript?
In this tutorial, we will learn how to lay out table cells, rows, and columns with JavaScript. We can construct and edit DOM (Document Object Model) elements using JavaScript. There are two ways to add HTML components, such as tables, to an HTML document. The first is to include the HTML table tag directly into our HTML webpage, and the second is to create the full table within our JavaScript code. The second method is the most commonly used for building and adding tables to the DOM. The tr abbreviation refers to the table row. This reflects the ...
Read MoreUsing FFMPEG with HTML5 for online video hosting
HTML5 introduced the native element, enabling browsers to play videos without plugins like Flash. FFMPEG is a powerful command-line tool that can convert videos into HTML5-compatible formats for seamless web streaming. HTML5 Video Formats Modern browsers support three main video formats: Format Codec Browser Support MP4 ...
Read MoreUnderline text with CSS
Use the text-decoration property to underline text with CSS. This property provides several options for decorating text, with underline being one of the most commonly used values. Syntax text-decoration: underline; Basic Example India Different Underline Styles You can customize the underline appearance using additional properties: ...
Read MoreLCM of an array of numbers in Java
L.C.M. or Least Common Multiple of two values, is the smallest positive value which is a multiple of both values. For example, multiples of 3 and 4 are: 3 → 3, 6, 9, 12, 15 ... 4 → 4, 8, 12, 16, 20 ... The smallest common multiple is 12, hence the LCM of 3 and 4 is 12. Understanding LCM of Array To find the LCM of an array of numbers, we can use the mathematical relationship: LCM(a, b) = (a × b) / GCD(a, b). For multiple numbers, we calculate LCM iteratively. ...
Read MoreJavaScript Determine the array having majority element and return TRUE if its in the same array
We are required to write a JavaScript function that takes in an array of numbers with repetitive values and returns the number that appears for more than (n/2) number of times where n is the length of the array. If there is no such element in the array, our function should return false. This problem is commonly known as finding the "majority element" in an array. A majority element is one that appears more than half the time in the array. Algorithm Approach We'll use the Boyer-Moore Voting Algorithm, which works in two phases: ...
Read MoreMethod to check if array element contains a false value in JavaScript?
To check if an array element contains a false value in JavaScript, you can use methods like some(), includes(), or Object.values() depending on your data structure. Using some() for Simple Arrays The some() method tests whether at least one element passes a test function: const booleanArray = [true, false, true]; const hasfalseValue = booleanArray.some(value => value === false); console.log("Array contains false:", hasfalseValue); // Or more simply const hasFalse = booleanArray.includes(false); console.log("Using includes():", hasFalse); Array contains false: true Using includes(): true Using Object.values() for Nested Objects For complex nested structures, ...
Read MoreImplement divide & conquer logic in JavaScript to implement QuickSort
We are required to write a JavaScript function that takes in an array of numbers and uses the quick sort algorithm to sort it. QuickSort Algorithm QuickSort is a divide and conquer algorithm that works by selecting a 'pivot' element from the array and partitioning other elements into two sub-arrays according to whether they are less than or greater than the pivot. The sub-arrays are then sorted recursively. How It Works The algorithm follows these steps: Choose a pivot element (typically the middle element) Partition the array so elements smaller than pivot go to the ...
Read MoreRemoving identical entries from an array keeping its length same - JavaScript
We have to write a function that takes in an array, removes all duplicates from it and inserts the same number of empty strings at the end. For example − If we find four duplicate values, we have to remove them all and insert four empty strings at the end. Understanding the Problem The goal is to: Remove duplicate elements from the array Keep only the last occurrence of each element Maintain the original array length by adding empty strings Example ...
Read MoreUIWebView HTML5 Canvas & Retina Display
When working with HTML5 Canvas on retina displays in UIWebView, images may appear blurry due to pixel density differences. Here's how to properly handle retina displays for crisp canvas rendering. The Retina Display Problem Retina displays have higher pixel density (devicePixelRatio > 1), but Canvas elements default to standard resolution, causing blurry images and drawings. Solution: Scale Canvas for Retina The key is to scale the canvas context and adjust its internal dimensions to match the device's pixel ratio: var canvas = document.getElementById('myCanvas'); var context = canvas.getContext('2d'); var width = 300; ...
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