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When handling HTTP POST requests in Java using Servlets, you may need to extract the request body from the HttpServletRequest object. This is useful when dealing with raw JSON data, form submissions, or XML payloads. Extracting Request Body from HttpServletRequest The HttpServletRequest object provides an InputStream from which you can read the request body. You can use getReader() or getInputStream(), depending on your needs. Using BufferedReader (getReader) The getReader() method returns a BufferedReader that allows you to read the request body as text. import java.io.BufferedReader; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; @WebServlet("/postHandler") public ... Read More
Deploying a Golang application directly across different environments can be very complex and inconsistent. Other problems include managing dependencies, configuring for different operating systems, and environmental differences. Dockerizing the application makes it easier to guarantee that it will run correctly in any environment by packaging it and its dependencies into a container. Prerequisites Before you start, make sure you have the following installed: Golang (latest stable version) Docker (Docker Desktop or CLI) Basic knowledge of Golang and Docker Approaches to Dockerizing a Golang Application There ... Read More
MySQL is a relational database based on Structured Query Language used to access and manage records in a database. MySQL is based on a client-server architecture that follows a request-response cycle. Clients make requests through GUI or command prompt using MySQL. Fixing Errors in MySQL Server Here are the steps to connect to the MySQL Server using VS Code - Open Visual Studio code. Go To -> extensions, search MySQL Open the extension called MySQL management tool and install it. Click on the ... Read More
When designing a MySQL database, selecting the right numeric data type is crucial for balancing precision, storage efficiency, and performance. Decimal, Double, and Float are three common numeric types, each serving distinct purposes. While Decimal offers exact precision for financial data, Float and Double handle approximate values for scientific calculations. This article explores their differences, use cases, and practical examples to help you make informed decisions. What is Decimal Decimal (or DECIMAL(M, D)) is a fixed-point data type designed for precise arithmetic, such as financial calculations. It stores exact numeric values with a specified precision (M = total ... Read More
The sum of the first N even numbers is a mathematical operation. In this operation, we add up the firstN even numbers. In Python, there are multiple ways to calculate this sum. In this article, we are going to learn and discuss various approaches to finding the sum of the first N even numbers in Python. Finding the Sum of the First N Even Numbers The formula for finding the sum of the first N even numbers is: Sum = N * (N + 1) Example 1Let's look at a scenario where N=5, The first 5 even numbers ... Read More
In a SQL Server database, slow-running queries can severely impact performance, leading to delays, timeouts, and increased server load. Identifying and optimizing these queries is crucial to ensuring a smooth and efficient database operation. Common reasons for slow queries include missing indexes, inefficient joins, high I/O operations, outdated statistics, and parameter sniffing issues. Prerequisites Before identifying slow queries, ensure you have the necessary access and tools: Database Administrator (DBA) Privileges − You need appropriate permissions to run diagnostic queries. SQL Server Management Studio (SSMS) − This tool provides execution plans ... Read More
Setting object values to null can help reset data, free up memory, or show that a value is no longer needed. In JavaScript, the null value is used to indicate that there is an intentional absence of any object value. This article provides various methods for setting JavaScript object values to null and what that means. Setting an Object's values to null Setting object values to null can be done in two types: For Specific Object Value For Multiple Object Value For Specific Object Value Setting the specific ... Read More
The spread (…) operator of JavaScript is used to expand an array or any other iterable into individual elements. It was introduced in ECMAScript 2015 (ES6). The spread operator is a powerful feature of JavaScript that allows one to perform operations for complex and lengthy code in a simple single line of code. The spread operator is denoted by the (...) (triple dot) symbol. You can simply create a copy of any existing array with the spread operator. The basic syntax of the spread operator is mentioned below - const newArray = [...existingArray]; Usage on Arrays The spread operator has ... Read More
The spread operator in function calls enhances the function parameter handling. The spread operator allows you to expand an array or any iterable across zero or more arguments in a function call. This article will guide you on using the spread operator in a function call. The spread operator is a powerful feature of JavaScript that allows one to perform operations for complex and lengthy code in a simple single line of code. The spread operator is denoted by the (...) (triple dot) symbol. Syntax The basic syntax of spread operator for function calls is mentioned below: functionName(...iterableObject) ... Read More
The isNaN() function in JavaScript is used to check whether a given value is NaN. This function converts the argument to a number first, then checks if it's NaN. When you pass null to isNaN(), it returns false, which can be surprising. This happens because of JavaScript type coercion when using isNaN(). In this article, we will understand why isNaN returns false for null. Understanding isNaN and Type Coercion in Js Before moving forward in this article you need to understand the following key concepts of this article: isNaN in Js: The isNaN() function ... Read More