Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Economics & Finance
Let's say, we have an array of objects with each object having exactly two properties, x and y that represent the coordinates of a point. We have to write a function that takes in this array and an object with x and y coordinates of a point and we have to sort the points (objects) in the array according to the distance from the given point (nearest to farthest). The Distance Formula It is a mathematical formula that states that the shortest distance between two points (x1, y1) and (x2, y2) in a two-dimensional plane is given by ... Read More
Converting an array of objects to key-value pairs is a common task in JavaScript. This involves transforming structured data into a simple object where one property becomes the key and another becomes the value. Problem Statement Suppose we have an array of student objects like this: const arr = [ {"name": "Rahul", "score": 89}, {"name": "Vivek", "score": 88}, {"name": "Rakesh", "score": 75}, {"name": "Sourav", "score": 82}, {"name": "Gautam", "score": 91}, {"name": "Sunil", ... Read More
Use the style.height property to dynamically set the height of HTML elements with JavaScript. This property accepts height values in pixels, percentages, or other CSS units. Syntax element.style.height = "value"; Where value can be in pixels (px), percentages (%), or other CSS units like em, rem, vh, etc. Example: Setting Button Height Heading 1 This is Demo Text. Update Height ... Read More
To play HTML audio blocks sequentially without gaps or clicks, use the onended event to chain audio playback seamlessly. HTML Structure First, set up multiple audio elements with unique IDs: Basic Sequential Playback Use the onended event to automatically play the next audio when the current one finishes: var one = document.getElementById('one'); one.onended = function() { ... Read More
Yes, HTML5 includes the crossorigin attribute. According to the official specification, it's defined as: The crossorigin attribute is a CORS settings attribute. Its purpose is to allow images from third-party sites that allow cross-origin access to be used with canvas. Syntax Supported Values The crossorigin attribute accepts two values: Value Description Credentials Sent? anonymous Performs CORS request without credentials No use-credentials Performs CORS request with credentials Yes Example: Canvas Image Access ... Read More
JavaScript Sets provide methods to remove elements efficiently. The primary method is delete(), which removes a specified value from the Set. Using the delete() Method The delete() method removes a value from the Set and returns true if the value existed, or false if it didn't. Syntax set.delete(value) Example: Removing Individual Elements const mySet = new Set([1, 2, 3, 4, 5]); console.log("Original Set:", mySet); // Remove elements console.log("Delete 3:", mySet.delete(3)); // true - existed console.log("Delete 10:", mySet.delete(10)); // false - didn't exist console.log("Updated Set:", mySet); console.log("Set size:", ... Read More
JavaScript provides several methods to find the minimum value in an array. The most efficient approach is using Math.min() with the spread operator, though other methods like sorting are also available. Using Math.min() with Spread Operator (Recommended) The Math.min() function finds the smallest number among its arguments. Combined with the spread operator (...), it can easily find the minimum value in an array. Find Minimum function findMinimum() { var numbers = [6, 39, 55, 1, 44]; var minimum = Math.min(...numbers); ... Read More
The yield* expression in JavaScript is used to delegate to another generator function or any iterable object. It yields all values from the delegated generator or iterable, effectively "flattening" nested generators. Syntax function* generatorFunction() { yield* anotherGenerator(); yield* iterableObject; } Basic Example: Delegating to Another Generator yield* Example yield* keyword in JavaScript CLICK ... Read More
We are required to write a function that takes two numbers as arguments m and n, and it returns the sum of all even numbers that falls between m and n (both inclusive). For example: If m = 10 and n = -4 The output should be 10+8+6+4+2+0+(-2)+(-4) = 24 Approach We will first calculate the sum of all even numbers up to n and the sum of all even numbers up to m. Then we will check for the bigger of the two m and n. Subtract the sum of smaller ... Read More
We are required to write a function that takes in an array of exactly five elements representing the five cards of a poker player drawn randomly. If the five cards contain at least one pair, our function should return the card number of the highest pair (trivial if there only exists a single pair). Else our function should return false. For example: If the array is − const arr = ['A', 'Q', '3', 'A', 'Q']; Then our function should return − 'A' (as 'A' > 'Q' in card games) Card Ranking System ... Read More