Refining a Class Hierarchy: Deepening the Object-Oriented Foundation in DTLib
All classes in DTLib must belong to a single inheritance tree. This design ensures consistent behavior when objects are allocated on the heap. The InvalidOperationException class is a newly added derived exception type, designed to be thrown when a member function is called in an incorrect state.
Key Improvements
The Exception class now inheri ...
Posted on Thu, 06 Aug 2026 16:19:28 +0000 by steamPunk
Object-Oriented Programming in JavaScript
JavaScript differs from class-based OOP languages. While languages like Java or C++ use classes as blueprints for creating objects, ECMAScript defines JavaScript objects as unordered collections of properties. Each property has a name that maps to a value, which can be a primitive, object, or function.
Object Creation
Using the Object Construct ...
Posted on Tue, 04 Aug 2026 16:46:40 +0000 by lorri
Introduction and Fundamentals of C++ Programming
Below is a basic C++ program:
#include <iostream>
using namespace std;
int main() {
cout << "Hello, world!" << endl;
return 0;
}
The newline character \n can be used instead of endl for line breaks. However, there's a subtle difference: \n simply inserts a newline, whereas endl flushes the output buffer, en ...
Posted on Wed, 29 Jul 2026 16:43:36 +0000 by rhaggert
Core Concepts of Classes and Objects in C++
Object-Oriented Principles in C++
C++ implements three core object-oriented princpiles: encapsulation, inheritance, and polymorphism. Objects represent entities with porperties and behaviors. For example:
A Person object might have properties like name and age, with behaviors like speak() and walk()
A Vehicle object could have properties like ...
Posted on Wed, 29 Jul 2026 16:13:38 +0000 by lajkonik86
Understanding JavaScript Prototype Chains and Inheritance
JavaScript's Inheritance Design
JavaScript's inheritance model operates through prototype chains rather than classical class-based inheritance. When Netscape needed a scripting language for web interactivity in 1994, Brendan Eich designed a system where objects inherit directly from other objects.
In classical languages like Java, inheritance w ...
Posted on Wed, 29 Jul 2026 16:09:15 +0000 by jsinker
Simple Factory Pattern in C#
Simple Factory Pattern in C#
Why Use Design Patterns?
Design patterns represent solutions crafted by experienced developesr over years of practice. Here's why they matter:
Build on Proven Solutions - Applying design patterns means leveraging collective industry knowledge rather than starting from scratch. Improved Code Readability - Developers ...
Posted on Sun, 26 Jul 2026 17:18:26 +0000 by TenaciousC
Python Object-Oriented Programming Fundamentals
Understanding OOP Concepts
Object-oriented programming (OOP) is a fundamental paradigm in Python that enables developers to create modular, reusable, and maintainable code. This article explores the core concepts of OOP in Python including classes, objects, inheritance, polymorphism, and encapsulation.
Classes and Objects
A class serves as a bl ...
Posted on Fri, 24 Jul 2026 16:30:15 +0000 by Spogliani
Implementing the Factory Method Pattern for Web Crawlers
Simple Factory Limitations
Basic factory implementations often suffer from inflexibility when new types need to be added. Consider a web crawler system with different spider types:
enum class CrawlerType {
TEXT,
IMAGE,
};
class BasicSpiderFactory {
public:
static shared_ptr<Spider> CreateCrawler(CrawlerType type) {
sw ...
Posted on Wed, 15 Jul 2026 17:22:13 +0000 by splat78423
Understanding Java Inheritance and Type Casting
In Java, inheritance and type casting operations follow specific rules that affect how objects can be assigned and converted between parenet and child classes. Consider the folloiwng class hierarchy:
class Animal {}
class Canine extends Animal {}
class Feline extends Animal {}
public class TypeCastingExample {
public static void main(Strin ...
Posted on Wed, 15 Jul 2026 16:17:10 +0000 by shana
C++ Fundamentals: Transitioning from C
Table of Contents
What is C++
C++ Keywords (C++98)
Namespaces
Namespace Usage
C++ Input & Output
Default Parameters
Function Overloading
References
Inline Functions
What is C++
C++ is an object-oriented high-level programming language that was developed based on the foundations of the C language.
C++ Keywords (C++98)
C++ contains a total ...
Posted on Fri, 22 May 2026 22:01:10 +0000 by kingconnections