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Economics & FinanceJavaScript provides several methods to repeat a string for a specific number of times. This functionality is useful for generating patterns, creating padding, or building repeated text sequences in web applications. Problem Statement Write a JavaScript function that takes a string and a positive integer as input and returns a new string that repeats the input string for the specified number of times. If the input string is empty or the specified number of times is zero, the function should return an empty string. Sample Input: String: "Hello" Number of Times: 3 Sample Output: ... Read More
In this tutorial, we are going to learn about how to create a canvas with a Circle object using FabricJS. Circle is one of the various shapes provided by FabricJS. In order to create a circle, we will have to create an instance of fabric.Circle class and add it to the canvas. Syntax new fabric.Circle({ radius: Number }: Object) Parameters options (optional) − This parameter is an Object which provides additional customizations to our object. Using this parameter, properties such as colour, cursor, ... Read More
To access table elements using JavaScript, you can use methods like document.getElementById() or document.getElementsByTagName() to select the table, then access individual rows and cells. This article demonstrates how to access table rows and create an interactive hover effect. Basic Table Access Methods JavaScript provides several ways to access table elements: By ID: document.getElementById('tableId') - Access a specific table By Tag Name: document.getElementsByTagName('tr') - Access all table rows Table Properties: Use table.rows or table.childNodes to access rows Example: Interactive Table with Hover Effect Let's create a table where rows highlight when you hover over ... Read More
Given two arrays and the task is to convert those two arrays into a JSON object. Where the first array elements are keys of the object and the second array elements are values of the object. Input-Output Scenario Let's look into the scenario of how two arrays will be converted into a JSON object. Consider two arrays are having some elements. Now, we need to convert these two arrays into a JSON object. Array1 = [1, 2, 3, 4]; Array2 = ['A', 'B', 'C', 'D']; Output = {"1":"A", "2":"B", "3":"C", "4":"D"} //JSON object ... Read More
Finding common elements among multiple arrays is a frequent requirement in JavaScript programming. This problem involves identifying elements that appear in every array within a collection of arrays. What are Arbitrary Number of Arrays An arbitrary number of arrays refers to any collection of multiple arrays (more than two) where we need to find intersection elements. These arrays can contain random elements and are typically organized as an array of arrays or nested data structure. // Example: Array of arrays const arrayCollection = [ [1, 2, 3, 4], [2, 3, 5, 6], ... Read More
In this problem statement, our aim is to create a function to find out that the given string is palindrome with the help of Javascript functionalities. So for solving this problem first we need to understand the problem in simple terms. Understanding the Problem Statement We have given a string as an input string and our main aim is to check if the string is a palindrome string or not. If it is palindrome then return true otherwise return false. What is a Palindrome? A palindrome is a string that reads the same forwards and backwards. ... Read More
The h-index is a metric used to measure both the productivity and citation impact of a researcher. In JavaScript, we can calculate it by analyzing an array of citation counts for a researcher's papers. What is H-Index? A researcher has h-index of value h if they have h papers with at least h citations each, and the remaining papers have no more than h citations each. For example, if a researcher has papers with citations [1, 6, 3, 0, 5], they have 3 papers with at least 3 citations (papers with 6, 3, and 5 citations), so the ... Read More
We are required to write a JavaScript function that takes in a number and returns true if the reverse of that number is a prime number, false otherwise. Problem Understanding To solve this problem, we need two helper functions: A function to reverse the digits of a number A function to check if a number is prime Solution Implementation Here's the complete solution with helper functions: const num = 13; const findReverse = (num) => { return +num .toString() .split('') .reverse() .join(''); }; const isPrime = (num) => { if (num
In this tutorial, we are going to create a Circle with background colour using FabricJS. Circle is one of the various shapes provided by FabricJS. In order to create a circle, we have to create an instance of fabric.Circle class and add it to the canvas. The backgroundColor property allows us to assign a colour to our object's background. It is the colour of the container (where the circle lives) which is square in shape. Syntax new fabric.Circle({ backgroundColor: String }: Object) Parameters ... Read More
We are required to write a JavaScript function that takes in a string and reverses the words in the string that have an even number of characters in them. Let's say the following is our string: const str = 'This is an example string'; We want to reverse the even length words of the above string i.e. reverse the following words: This (4 characters) is (2 characters) an (2 characters) string (6 characters) The word "example" has 7 characters (odd length), so it remains unchanged. Syntax ... Read More