The Five Most Useful Design Patterns Explained

🧩Design patterns are reusable solutions to common programming problems.

🎨The strategy pattern allows for easy extension and modification of objects without changing their original implementation.

👀The decorator pattern enables the extension of objects by wrapping them with additional functionality.

🔔The observer pattern facilitates communication between objects by notifying interested parties of changes.

🏢The singleton pattern ensures that there is only one instance of a class, providing global access to that instance.

What are design patterns?

—Design patterns are reusable solutions to common programming problems.

How many design patterns are there?

—There are 23 design patterns covered in the Gang of Four book, but some patterns are more commonly used than others.

What is the strategy pattern?

—The strategy pattern allows for easy extension and modification of objects without changing their original implementation.

What is the decorator pattern?

—The decorator pattern enables the extension of objects by wrapping them with additional functionality.

What is the observer pattern?

—The observer pattern facilitates communication between objects by notifying interested parties of changes.

00:00Design patterns are reusable solutions to common programming problems.

08:52The five most useful design patterns are: strategy, decorator, observer, singleton, and facade.