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The ResultSet interface in Java is used to retrieve data from a database in a tabular form. The isAfterLast() method is one of the navigation methods in the ResultSet that helps in checking the position of the cursor. Specifically, isAfterLast() checks whether the cursor is positioned after the last row of the result set. Method Definition The isAfterLast() method of the ResultSet interface is used to determine whether the cursor is after the end of the ResultSet.This method returns a boolean this value is true, if the cursor is after the end of the ResultSet else, it returns false. ... Read More
What is Potential Energy? Potential energy is a type of stored energy stored by an object due to its position relative to other objects. It is an important concept in physics and is commonly calculated when studying objects in gravitational fields. In this tutorial, we are going to learn how to calculate the potential energy of an object in C++ if the mass and height are given. Formula for Calculating Potential Energy The formula for potential energy is as follows: Potential Energy = m × g × h Where:m is the mass of the object (in kilograms).g is the gravitational ... Read More
Suppose we have an array of numbers called nums. We have to check whether it contains contiguous values or not. So, if the input is like nums = [6, 8, 3, 5, 4, 7], then the output will be true as the elements are 3, 4, 5, 6, 7, 8. Following is the sample example to check if elements of an array are consecutive. def solve(nums): if len(nums) < 1: return False min_val = min(nums) max_val = max(nums) if max_val - min_val ... Read More
To find the length of a linked list in JavaScript, we need to count how many nodes are present. A linked list is made up of nodes, where each node contains data and a reference to the next node. The length is determined by starting at the head and counting each node until the end of the list. If the list is empty, the length should be 0. Our task is to write a JavaScript program that calculates the length of a linked list . In other words, we need to find out how many nodes are in the ... Read More
A pointer is a variable that stores the address of another variable. We can hold the null values by using pointer. It can be accessed by using pass by reference. Also, there is no need of initialization, while declaring the variable. Instead of holding a value directly, it holds the address where the value is stored in memory. The two main operators used with pointers are the dereferencing operator and the address operator. These operators are used to declare pointer variables and access the values stored at those address. Pointer variable uses the dereferencing operator to access the value it ... Read More
Pointers A pointer is a variable that stores the address of another variable. Instead of holding a value directly, it holds the address where the value is stored in memory. The two main operators used with pointers are the dereferencing operator and the address operator. These operators are used to declare pointer variables and access the values stored at those addresses. The pointer variable uses the dereferencing operator to access the value it points to. We use the address operator to obtain the memory address of a variable and store it in the pointer variable. We use pointers to access ... Read More
A local static variable is a variable, whose lifetime doesn’t end with the function call in which it is declared. It extends until the entire programs lifetime. All function calls share the same copy of local static variables. Static Variables A static variable preserves its value across multiple function calls, maintaining its previous value within the scope where it was initialized. These variables are used to count the number of times a function is called. The default value of a static variable is 0. In contrast, normal local scope means that the variables defined within the block are only visible ... Read More
Over the past ten years, the use of the internet has increased. Some companies only offer their services or products online and don't have any offline aspects. Despite all of the focus on usability, one issue has been largely overlooked since it has been a usability barrier. Up until the past several years, the security of internet assets was a factor that received less attention than it deserved. Cybercrimes have increased as a result of increased internet usage. Cybercriminals are attacking the software of the companies by putting viruses in it. Let's learn how we can protect our devices from malware ... Read More
Searching for an algorithm is considered as a step-by-step procedure for specifying a data among a large set of data. The C programming language provides two types of searching techniques. They are as follows − Linear search Binary search Linear Search A Linear Search is also known as sequential search, which is a process for finding an item in a list of items. This kind of algorithm checks each element of the list one by one until a match is found in the total list . ... Read More
Since digital media marketing is more successful at attracting new clients than traditional marketing, businesses have been switching to it in recent years. Businesses are creating their online presence across a variety of channels, such as blogs and social media. Web application development is made simple by the numerous organizations that offer content management and website building platforms. Two such platforms that offer various services for creating websites, online apps, and e-commerce stores are Squarespace and WooCommerce. What is WooCommerce? WooCommerce is a WordPress-based online platform for e-commerce that offers a wide range of highly customizable features. It is an ... Read More