Source: Secrets to Extending Class Functionality Without Modification Using the Visitor Pattern in Java 1. Introduction: What is the Visitor Pattern? 1.1 Overview of the Visitor Pattern Introduce the Visitor Pattern as one of the Behavior...
Source: Pattern Matching with instanceof in Java 17 1. What is Pattern Matching for instanceof? This feature allows us to perform type casts and assignments in a single step. In previous versions, you’d typically follow an instanceof check wit...
Source: Shallow Copy vs Deep Copy in Java 1. Shallow Copy in Java A shallow copy of an object is a new object where the fields are copied directly from the original. But beware: for fields that are references, only the reference itself is cop...
Source: Tips for Mastering Java Intersection Types with Real-World Code Examples 1. What Are Intersection Types in Java? In Java, an intersection type is used to combine multiple types into one. For example, if you have two interfaces, Readabl...
Source: Understanding Covariance and Contravariance in Java 1. What is Covariance and Contravariance in Java? 1.1 Covariance in Java Covariance allows us to assign a more derived type to a less derived type. In simpler terms, it ref...
Source: Secrets of Java Inner Classes: What They Are, Why You Need Them, and How to Use Them Effectively 1. What Are Java Inner Classes? Java Inner Classes are classes defined within another class. The defining feature of an inner class is tha...
Source: Master Window Functions in MySQL: A Complete Guide with Examples 1. What are Window Functions in MySQL? Window functions in MySQL operate on a set of table rows that are somehow related to the current row. They allow you to calculate v...
Source: Techniques for Implementing Callbacks in Java: Code Examples and Results 1. Understanding Callbacks in Java Callbacks in Java are used to handle events or actions once a task is completed. They are particularly useful in asynchronous p...
Source: PostgreSQL Functions Overview 1. What Are PostgreSQL Functions? PostgreSQL functions are routines or stored procedures that encapsulate reusable SQL code. They allow you to perform complex operations directly within the database, reduc...
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