Object-oriented programming (OOP) is a programming paradigm fundamental to many programming languages, including Java and C++. In this article, we'll provide an overview of the basic concepts of OOP. We'll describe three main concepts: classes and instances, inheritance, and encapsulation. For now, we'll describe these concepts without reference to JavaScript in particular, so all the examples are given in pseudocode.
After that, in JavaScript, we'll look at how constructors and the prototype chain relate to these OOP concepts, and how they differ. In the next article, we'll look at some additional features of JavaScript that make it easier to implement object-oriented programs.
Principles of Object Oriented Programming in JavaScript torrent
Object-oriented programming is about modeling a system as a collection of objects, where each object represents some particular aspect of the system. Objects contain both functions (or methods) and data. An object provides a public interface to other code that wants to use it but maintains its own private, internal state; other parts of the system don't have to care about what is going on inside the object.
Second, although a prototype chain looks like an inheritance hierarchy and behaves like it in some ways, it's different in others. When a subclass is instantiated, a single object is created which combines properties defined in the subclass with properties defined further up the hierarchy. With prototyping, each level of the hierarchy is represented by a separate object, and they are linked together via the __proto__ property. The prototype chain's behavior is less like inheritance and more like delegation. Delegation is a programming pattern where an object, when asked to perform a task, can perform the task itself or ask another object (its delegate) to perform the task on its behalf. In many ways, delegation is a more flexible way of combining objects than inheritance (for one thing, it's possible to change or completely replace the delegate at run time).
To take this course, you should have a good understanding of JavaScript fundamentals. At least, you need to know all the topics I've covered in my JavaScript Basics course. You don't need any familiarity with object-oriented programming.
This course is designed to teach web developers how to utilize the various object-oriented programming features within JavaScript. Object-oriented programming allows developers to build applications with reusable and maintainable blocks of code, which leads to efficiency and simplified software design.
With object-oriented JavaScript, you'll be able to build classes to construct objects that encapsulate both data and functionality. You'll also learn how to leverage prototypal inheritance to maintain DRY code, allowing you to pass behaviors down to objects. You'll also learn how to keep data safe and secure by creating private state with closures and immediately-invoked function expressions.
The SOLID principles are fundamental to designing effective, maintainable, object-oriented systems. Whether you've only just begun writing software or have been doing so for years, these principles, when used appropriately, can improve the encapsulation and coupling of your application, making it more malleable and testable in the face of changing requirements.
This course dives into object-oriented TypeScript code, teaching you about object-oriented principles and how they can be applied to your TypeScript applications. Learn about objects, classes, inheritance, abstract classes, interfaces, and more.
TypeScript supports many different ways to define and create objects which can be confusing especially when you're new to the language. Should you use a constructor function, Object.create(), classes, a coding pattern, or some other technique when creating objects? In this course, Creating Object-oriented TypeScript Code, you'll learn different ways to create objects while focusing on object-oriented programming (OOP) techniques that can be used to maximize reuse and enhance productivity. First, you'll explore the core principles of object-oriented programming, such as encapsulation, polymorphism, inheritance, and abstraction, and see how they can be applied and used. Next, you'll discover how to define and instantiate classes in TypeScript, understand what members can be added to a class and the role they play. Then, you'll delve into how inheritance can be used to promote reuse, and what an abstract class is and why you'd use one. Finally, you'll learn about the role of interfaces and how they can be used to create code contracts that drive consistency across a set of objects and enable polymorphic behavior. When you're finished with this course, you'll have the skills and knowledge needed to build robust object-oriented applications using the TypeScript language and understand when and why to apply object-oriented programming principles.
This book contains an extended refactoring, and it details the rationale behind every change. It is a hands-on workbook rather than a list of theoretical ideas. It explains how to use the principles of object-oriented design to guide, not just the final arrangement of code, but each decision about what line of code to write next.
The 2nd Edition contains 3 new chapters and is about 50% longer than the 1st. Also, because 99 Bottles of OOP is about object-oriented design in general rather than any specific language, this time around we created separate books that are technically identical, but use different programming languages for the examples.
Clojure has been the main source of inspiration for Data-Oriented Programming. In a sense, Data-Oriented Programming is a formalization of the underlying principles of Clojure and how to apply them in other programming languages.
The principles of Data-Oriented programming are not new. They come from best practices that are well-known among software developers from various programming languages. The innovation of Data-Oriented programming is the combination of those principles into a cohesive whole.
One of the main innovation of JavaScript when it was released in December 1995 was the easiness to create and manipulate hash maps via object literals. The increasing popularity of JavaScript over the years as a language used everywhere (frontend, backend, desktop) has influenced the developer community to represent data with hash maps when possible. It feels more natural in dynamically-typed programming languages, it is applicable also in statically-typed programming languages.
This course is the largest of the introductory programming courses and is one of the largest courses at Stanford. Topics focus on the introduction to the engineering of computer applications emphasizing modern software engineering principles: object-oriented design, decomposition, encapsulation, abstraction, and testing. Programming Methodology teaches the widely-used Java programming language along with good software engineering principles. Emphasis is on good programming style and the built-in facilities of the Java language. The course is explicitly designed to appeal to humanists and social scientists as well as hard-core techies. In fact, most Programming Methodology graduates end up majoring outside of the School of Engineering. Prerequisites: The course requires no previous background in programming, but does require considerable dedication and hard work.
It is the result of many years of thinking about requirements and how to do them right, taking advantage of modern principles of software engineering. While programming, languages, design techniques, process models and other software engineering disciplines have progressed considerably, requirements engineering remains the sick cousin. With this book I am trying to help close the gap. 2ff7e9595c
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