Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Economics & Finance
We have two approaches to count 1's in a sorted binary array. The first one is to iterate through the array and count the 1's. The second approach is to use a binary search algorithm to find the first occurrence of 1 in the array. It is important to note that in order to use these approaches, the array must be sorted. In this article, we will discuss a JavaScript program to count the number of 1's in a sorted binary array. We will also look at some edge cases and optimization techniques to make the program more ... Read More
In JavaScript, you may need to check if any element appears more than a specified number of times in an array. This is useful for data validation, duplicate detection, and enforcing constraints on array contents. Problem Definition We need to write a function that takes two arguments: An Array of literals that may contain repeating elements A number representing the maximum allowed occurrences (limit) The function should return false if any element appears more than the limit, and true otherwise. Using reduce() and every() Methods The ... Read More
Suppose, we have an array of objects containing some data about some users like this − const arr = [ { "name":"aaa", "id":"2100", "designation":"developer" }, { "name":"bbb", "id":"8888", "designation":"team lead" }, { "name":"ccc", "id":"6745", ... Read More
In JavaScript, we can sort odd and even positioned elements separately within an array while maintaining their relative positions. This approach sorts elements at even indices (0, 2, 4...) and odd indices (1, 3, 5...) independently. Understanding the Problem Given an array, we need to sort elements at even indices separately from elements at odd indices. For example, with array [9, 2, 7, 4, 5, 6, 3, 8, 1]: Even indices (0, 2, 4, 6, 8): [9, 7, 5, 3, 1] → sorted: [1, 3, 5, 7, 9] Odd indices (1, 3, 5, 7): [2, 4, ... Read More
In this problem, we need to find the smallest number that is divisible by all numbers from 1 to n. This is essentially finding the Least Common Multiple (LCM) of the first n natural numbers. Understanding the Problem The problem requires finding the smallest positive integer that is evenly divisible by each of the numbers from 1 to n without any remainder. For example, if n = 4, we need the smallest number divisible by 1, 2, 3, and 4, which is 12. Logic and Approach We solve this using the Least Common Multiple (LCM) concept. ... Read More
In this tutorial, we are going to learn how to set the angle of skew on Y-axis of an Ellipse using FabricJS. Ellipse is one of the various shapes provided by FabricJS. In order to create an ellipse, we will have to create an instance of fabric.Ellipse class and add it to the canvas. Our ellipse object can be customized in various ways like changing its dimensions, adding a background color or by changing the angle of skew on Y-axis. We can do this by using the skewY property. Syntax new fabric.Ellipse({ skewY : Number }: Object) ... Read More
In this tutorial, we are going to learn how to make a Textbox invisible using FabricJS. Textbox is one of the various shapes provided by FabricJS. We can customize, stretch or move around the text written in a textbox. In order to create a textbox, we will have to create an instance of fabric.Textbox class and add it to the canvas. Our textbox object can be customized in various ways like changing its dimensions, adding a background color or by making it visible or invisible. We can do this by using the visible property. Syntax new fabric.Textbox(text: ... Read More
In this tutorial, we are going to learn about how to change the alignment of text to path in IText using FabricJS. The IText class was introduced in FabricJS version 1.4, extends fabric.Text and is used to create IText instances. An IText instance gives us the freedom to select, cut, paste or add new text without additional configurations. There are also various supported key combinations and mouse/touch combinations which make text interactive which are not provided in Text. Textbox, however, which is based on IText allows us to resize the text rectangle and wraps lines automatically. This is not ... Read More
To count pairs with given sum is a common problem asked in job interviews and is often used in many real-world applications such as cryptography and data compression. In this article we are having an array and a target sum value, our task is to write a JavaScript program to count pairs with given sum. Array: [1, 2, 3, 5, 6, 7, 9] Target Sum: 8 1 ... Read More
Given a string that consists of only two types of characters: "(" and ")". We are required to write a function that takes in one such string and balances the parentheses by inserting either a "(" or a ")" as many times as necessary. The function should then return the minimum number of insertions made in the string to balance it. For example: If the string is − const str = '()))'; Then the output should be 2, because by prepending '((' we can balance the string. How It Works The algorithm uses ... Read More