What are the 3 Types of Patterns? [2023]

are the 3 types of patterns?

Are you new to the field of design and wondering what design pattern is all about? Well, pattern design is a general term that covers all forms of design patterns, of which there are plenty, depending on your field of interest. The three main types of patterns are Creational Patterns, Structural Patterns, and Behavioral Patterns. Let's explore each of these types in greater detail.

Creational Patterns

Creational patterns concern themselves with the creation of objects. They are used to create objects in a way that is suitable for a particular situation. The main motive of this pattern is to provide more control over the object creation process and to reduce the number of the created instances.

Singleton Pattern

The Singleton pattern ensures that only a single instance of an object is created within the application. It's useful in situations where having more than one instance of the class can lead to complications. For example, consider an application that keeps track of the user's login status. There can only be one instance of the user object, which is what the Singleton pattern provides.

Factory Pattern

The Factory pattern is used to create objects without having to specify their exact class interfaces at compile-time. This pattern enables the flexibility of creating one class with an interface that creates multiple types of objects. The Factory pattern is especially useful when working with an interface of class hierarchy. For example, consider a music streaming app. The app can have a factory that produces stores for different kinds of music, like classical or jazz.

Builder Pattern

The Builder pattern separates the construction of a complex object from its representation, allowing the same construction process to create various representations. It helps to create objects that are too complex for constructors. In essence, you can think of Builder as a recipe for creating complex objects. For instance, consider a website builder application. The builder allows you to create complex web pages without coding manually.

Structural Patterns

Structural patterns are used to organize code in a clean and efficient manner. This pattern deals with class and object composition. It helps you to create a large and complex structure in a more straightforward and more manageable way.

Adapter Pattern

The Adapter pattern is used to make incompatible interfaces or classes work together by implementing a common interface without modifying their existing classes. This pattern can be useful when trying to reuse older code with new frameworks. For instance, consider a multi-device charger that outputs different power levels to charge different devices. An adapter can be used to change the voltage for the charger to work with a specific device.

Decorator Pattern

The Decorator pattern is used to add additional features to an object dynamically. In other words, this pattern allows you to modify an object's functionality without changing its original structure. This pattern is useful when you want to add new features to an object without modifying the underlying code. Consider an email messaging app. You can decorate the message by adding attachments or a common theme to the email.

Facade Pattern

The Facade pattern is used to simplify the complexities of a system by providing a simpler interface. This pattern provides a clear interface for the client-side code to interact with a complex system with sub-components by hiding the system's underlying complexity. For example, consider the Wix website builder. It provides a simple user interface for building websites, whereas under the hood, the system relies on various technologies like HTML, CSS, and JavaScript.

Behavioral Patterns

Behavioral patterns deal with communication between objects or classes. They describe how objects interact and behave with one another.

Strategy Pattern

The Strategy pattern is used to switch algorithms or methods dynamically during runtime. The goal of this pattern is to have interchangeable, interchangeable variations of an algorithm that can be or can't be influenced by the context of the problem that can be preserved in the runtime environment. For instance, consider a mobile app that has different algorithms for charging a phone's battery depending on the available power source.

Observer Pattern

The Observer pattern is used when one object's state changes, and dependent objects need to be notified and updated. An observable object keeps a track of its dependents, which get notified automatically whenever there's a change in the observable object's state. For example, consider a weather app that updates you on the weather based on changes in weather forecasts.

Command Pattern

The Command pattern is used to encapsulate all the information required to execute a specific command in an object and separate the execution of the command into a different function. Consider a remote control where buttons are programmed with a specific command to be executed by a device.

FAQ

What are the 4 main types of patterns used in design?

The four types of patterns used in design include Creational, Structural, Behavioral and Concurrency.

How many types of pattern design are there?

There are three types of pattern design, which are Creational Patterns, Structural Patterns, and Behavioral Patterns.

What is structural and Behavioral pattern?

Structural patterns deal with class and object composition. Structural Patterns help you to create a large and complex structure in a more straightforward and more manageable way. Whereas, Behavioral patterns deal with communication between objects or classes. They describe how objects interact and behave with one another.

Quick Tips and Facts

  • Design patterns improve software scalability and maintainability.
  • Using design patterns can be helpful even if you're working alone on a project.
  • It's essential to understand the context in which each pattern is applicable, as using the wrong pattern can have negative consequences.

In conclusion, design patterns are fundamental building blocks for developing software systems. They enable a clear division of concerns while making it possible to address complex problems with plainly defined motives. The three types of patterns, Creational Patterns, Structural Patterns, and Behavioral Patterns, bring specific values to the software development life cycle. It's important to understand each of these patterns and how they fit into the context of software development. We hope you found this blog post informative, and please contact us if you have any questions or feedback.

References

  1. Design Patterns in Software Development.
  2. Introduction to Design Patterns
  3. Creational Designs
  4. Structural Designs
  5. Behavioral Designs
  6. How Design Patterns Make Your Code More Maintainable
Jacob
Jacob

Jacob is a software engineer with over 2 decades of experience in the field. His experience ranges from working in fortune 500 retailers, to software startups as diverse as the the medical or gaming industries. He has full stack experience and has even developed a number of successful mobile apps and games.

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