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 17 of 534
JavaScript reduce sum array with undefined values
If you’re working with arrays in JavaScript, you may encounter situations where your array contains undefined values. This can happen when you're processing data from various sources or working with incomplete datasets. One common problem developers face is summing the values of an array with undefined elements. JavaScript’s reduce() method is a versatile tool that can help you solve this problem efficiently. In this article, we will explore how to use the reduce() method to sum an array, even when it includes undefined values, and ensure that the final result is correct. What is the reduce() Method in JavaScript? The ...
Read MoreJavaScript - Redirect a URL
In JavaScript, redirecting a user from one URL to another is a straightforward task. There are multiple ways to achieve this, but we’ll focus on two of the most common and effective methods: window.location.href and window.location.replace(). Both are widely used for different purposes, and understanding when to use each one can help improve user navigation on your site. Approaches to Redirect a URL in JavaScript Following are the different approaches to redirect a URL: Using window.location.href Using window.location.replace() Redirect a URL Using window.location.href Property The window.location.href property is one of ...
Read MoreJavaScript Program to Find Closest Number in Array
To find closest number in array using Javascript, we will be understanding and discussing three different approaches. We will also compare time and space complkexities of all the appproaches used. In this article we are having an array and a target value, our task is to find closest number to target value in array using Javascript. User must know about JavaScript arrays, searching alogorithms such as linear and binary search, sorting, loops, and conditional statement. Approaches to Find Closest Number in Array Here is a list of approaches to find closest number in array in JavaScript which we will ...
Read MoreJavaScript Program for Products of ranges in an array
We will be given an array and we have to answer some queries related to the given range that is from a given starting index to the ending point or index we have to return the product of the elements in that range. We will see some approaches in this article to implement the above problem in JavaScript with the explanation. Introduction to Problem We are given an array and some queries, in each query we will be given some ranges by indicating the first and the last index of the range and we have to answer the product of ...
Read MoreJavaScript Count the number of unique elements in an array of objects by an object property
In JavaScript, when dealing with arrays of objects, it’s common to need to extract specific values based on object properties and count how many unique occurrences exist for a particular property. Whether you're processing a list of users, products, or any other data structure, counting unique elements by a property is a useful operation.In this article, we'll discuss how to count the number of unique elements in an array of objects based on a specific property using a few different techniques. Problem Statement You have an array of objects representing users, each with properties like name, age, gender, etc. You ...
Read MoreJavaScript Program to Find k Pairs with Smallest Sums in Two Arrays
To find k pairs with smallest sums in two arrays in Javascript, we will be using sorted arrays in ascending order. We are going to discuss two different approaches with stepwise explanation and examples. In this article we are having two arrays and a value of k, our task is to find k pairs with smallest sums in two arrays. Users must be familiar with JavaScript arrays, loops and conditional statement. Example Input: arr1 = [1, 7, 11], arr2 = [2, 4, 6] k = 3 Output: [[1, 2], [1, 4], [1, 6]] Input: arr1 = [1, 4, ...
Read MoreES2022 JavaScript at() Method
JavaScript is a powerful and versatile programming language that is widely used for both front-end and back-end development. One of the features that makes JavaScript so powerful is its extensive standard library, which includes many built-in methods for working with strings, arrays, and other data types. One such method is the at() method, which was introduced in ECMAScript 2022 and is used to retrieve the character at a given index in a string. In this tutorial, we'll take a look at how to use the at() method, as well as explore some of its advantages over the older charAt() method. ...
Read MoreJavaScript example for Capturing mouse positions after every given interval
In this article, we will demonstrate how to capture the mouse position in JavaScript at regular intervals and log or use this data for various purposes. Capturing mouse positions after every given interval refers to a program or functionality where the current position of the mouse pointer is tracked at regular time intervals. This can be useful in scenarios like debugging, interactive applications, or visualizing user movement on a web page. Use Cases Imagine you want to monitor user activity on a web page and record the mouse position every second. This can be useful for: ...
Read MoreJavaScript tracking the differences between elements in an array
Tracking differences between elements in an array is a fundamental task in data analysis and software development. Whether you're analyzing trends in numerical data, measuring changes over time, or debugging an application's behavior, calculating these differences can provide valuable insights. In JavaScript, this task is often approached using various techniques, including loops and modern functional programming methods like the map() function. Here are two methods to calculate differences between elements in an array: Iterative Loop and Functional Programming using the map. Problem Statement We are given an array of Number literals, and we are required to write a function that returns ...
Read MoreJavaScript program to find if there is a subarray with 0 sum
A subarray with a sum of 0 is a sequence of contiguous elements within an array where the sum of all elements in that sequence equals zero. Identifying such subarrays is a common problem in data analysis and coding challenges. The prefix sum technique efficiently solves this problem. In this article we will find if there is a subarray with 0 sum using JavaScript. Continuously calculate the prefix sum while traversing the array and use a hash map to store sums seen so far. Check if the current prefix sum ...
Read More