Science & Technology

10 Design Patterns Explained in 10 Minutes

📚 Main topics

Singleton and PrototypeA Singleton restricts a class to one instance, though JavaScript’s global objects can often provide the same behavior with less boilerplate. The Prototype pattern lets objects inherit from existing objects, offering an alternative to class-based inheritance. 1:33
Builder and FactoryBuilder constructs an object step by step, often using chained methods, while Factory centralizes the choice of which object to create. 3:35
Facade and ProxyA Facade offers a simpler interface to complex systems. A Proxy stands in for an object and can intercept operations, such as property access or changes that trigger UI updates. 5:06
Iterator and ObserverIterators define how to move through a collection, while Observers let multiple subscribers receive updates when an object broadcasts new data. 6:38
Mediator and StateA Mediator coordinates communication between objects, reducing direct dependencies. The State pattern changes an object’s behavior according to its current state, avoiding sprawling conditional logic. 8:41

✨ Key takeaways

Patterns solve recurring problemsThe Gang of Four’s design patterns are grouped into creational, structural, and behavioral categories, covering object creation, relationships, and communication. 0:31
Patterns are not copy-and-paste recipesApplying a pattern takes judgment, and using one where it is not needed can add complexity and boilerplate. 1:02
Use language features thoughtfullyBefore implementing a pattern, consider whether the language already provides a simpler way to achieve the same result. 2:04

🧠 Lessons learned

Choose patterns for a reasonPatterns can make code easier to organize and maintain, but they can also be unnecessary or overcomplicate a project. 1:02
Recognize patterns in everyday toolsJavaScript iteration, library APIs, Vue’s reactivity, Firebase subscriptions, and Express middleware all illustrate pattern concepts. 3:04

🏁 Conclusion / next steps

Keep exploringThe video covers ten patterns, but many more exist. Learn how to apply them in real applications and choose the simplest approach that fits the problem. 10:44

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Transcript excerpt

0:00 when you first become a junior developer your code will look like Playdoh snakes but as you progress to senior developer and learn about software design patterns your code will look like the cysteine chapel but when you then progress to principal engineer you'll realize that nobody wants to maintain the Sistine Chapel for a silly website and go back to making Play-Doh snakes in today's video you'll learn about 10 different software design patterns along with the pros and cons of using them which can be very subjective and controversial one of the most influential books in the history of programming is design patterns by four C++ Engineers called The Gang of four it

0:31 breaks down 23 different approaches to address recurring problems that programmers face which are categorized as creational patterns how objects are created structural patterns how objects relate to each other and behavioral patterns how objects communicate with each other becoming a proficient software engineer is not about memorizing the syntax of a programming language but rather the ability to solve problems with it by the end of this video you'll understand a variety of different patterns for solving problems as they relate to Modern app developers before we get started I want to give a big shout out to Refactoring Guru they

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