# design-patterns-in-ruby/design-patterns-in-ruby

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2,560 stars · 504 forks · Ruby · CC0-1.0

## Links

- GitHub: https://github.com/design-patterns-in-ruby/design-patterns-in-ruby
- awesome-repositories: https://awesome-repositories.com/repository/design-patterns-in-ruby-design-patterns-in-ruby.md

## Description

This project serves as an educational resource and technical reference for implementing classic software design patterns within the Ruby programming language. It provides a curated collection of code examples that demonstrate how to apply behavioral, creational, and structural design patterns to solve common software development problems.

The repository distinguishes itself by focusing on the intersection of established design principles and Ruby’s unique language mechanisms. It illustrates how to leverage dynamic method dispatch, duck typing, and mixins-based composition to create modular and reusable code. By applying these patterns, developers can improve the maintainability and scalability of their applications while reducing technical debt through effective refactoring and structural organization.

The collection covers a broad range of architectural approaches, including techniques for managing object instantiation, simplifying complex system relationships, and decoupling object communication. These examples translate abstract design concepts into concrete, idiomatic Ruby implementations, providing a practical guide for structuring object-oriented systems.

## Tags

### Education & Learning Resources

- [Design Pattern Examples](https://awesome-repositories.com/f/education-learning-resources/educational-resources/reference-and-media/books-docs-reference/code-examples/design-pattern-examples.md) — Provides a curated collection of code implementations demonstrating classic software design patterns in Ruby.

### Software Engineering & Architecture

- [Design Pattern Implementations](https://awesome-repositories.com/f/software-engineering-architecture/design-pattern-implementations.md) — Translates abstract design concepts into concrete, idiomatic Ruby implementations for real-world software problems.
- [Object Oriented Designs](https://awesome-repositories.com/f/software-engineering-architecture/software-architecture/architectural-patterns/modular-decoupled-design/structural-design-paradigms/object-oriented-designs.md) — Applies proven object-oriented design patterns to structure Ruby code for better maintainability and scalability.
- [Adapter Patterns](https://awesome-repositories.com/f/software-engineering-architecture/adapter-patterns.md) — Illustrates the adapter pattern to allow objects with incompatible interfaces to collaborate. ([source](https://github.com/design-patterns-in-ruby/design-patterns-in-ruby#readme))
- [Object-Oriented Programming](https://awesome-repositories.com/f/software-engineering-architecture/architectural-design-patterns/object-oriented-foundations/object-oriented-programming.md) — Serves as a technical reference for developers learning to structure software using established object-oriented principles.
- [Language Mixins](https://awesome-repositories.com/f/software-engineering-architecture/architectural-design-patterns/object-oriented-foundations/object-oriented-programming/behavior-customization/entity-behavior-modules/trait-based-compositions/language-mixins.md) — Provides examples of using mixins to inject reusable functionality into classes at runtime.
- [Observer Patterns](https://awesome-repositories.com/f/software-engineering-architecture/architectural-design-patterns/state-management/reactive-subscription-systems/observer-patterns.md) — Defines one-to-many dependencies so that state changes automatically notify all registered dependents. ([source](https://github.com/design-patterns-in-ruby/design-patterns-in-ruby#readme))
- [Command Patterns](https://awesome-repositories.com/f/software-engineering-architecture/behavioral-design-patterns/command-patterns.md) — Encapsulates requests as objects to support parameterization, queuing, and undoable operations. ([source](https://github.com/design-patterns-in-ruby/design-patterns-in-ruby/blob/main/README.md))
- [Interpreter Patterns](https://awesome-repositories.com/f/software-engineering-architecture/behavioral-design-patterns/interpreter-patterns.md) — Defines grammatical representations for languages and provides interpreters to evaluate them. ([source](https://github.com/design-patterns-in-ruby/design-patterns-in-ruby/blob/main/README.md))
- [Iterator Patterns](https://awesome-repositories.com/f/software-engineering-architecture/behavioral-design-patterns/iterator-patterns.md) — Enables sequential access to collection elements without exposing underlying data structures. ([source](https://github.com/design-patterns-in-ruby/design-patterns-in-ruby/blob/main/README.md))
- [Mediator Patterns](https://awesome-repositories.com/f/software-engineering-architecture/behavioral-design-patterns/mediator-patterns.md) — Reduces chaotic dependencies between objects by forcing communication through a central mediator. ([source](https://github.com/design-patterns-in-ruby/design-patterns-in-ruby/blob/main/README.md))
- [Strategy Patterns](https://awesome-repositories.com/f/software-engineering-architecture/behavioral-design-patterns/strategy-patterns.md) — Encapsulates families of algorithms to make them interchangeable at runtime. ([source](https://github.com/design-patterns-in-ruby/design-patterns-in-ruby#readme))
- [Template Method Patterns](https://awesome-repositories.com/f/software-engineering-architecture/behavioral-design-patterns/template-method-patterns.md) — Implements the template method pattern to define algorithm skeletons in base classes while delegating specific steps to subclasses. ([source](https://github.com/design-patterns-in-ruby/design-patterns-in-ruby/blob/main/README.md))
- [Composite Patterns](https://awesome-repositories.com/f/software-engineering-architecture/composite-patterns.md) — Implements the composite pattern to organize objects into tree structures for uniform treatment of individual and composite elements. ([source](https://github.com/design-patterns-in-ruby/design-patterns-in-ruby#readme))
- [Builder Patterns](https://awesome-repositories.com/f/software-engineering-architecture/creational-design-patterns/builder-patterns.md) — Provides implementations of the builder pattern for constructing complex objects through step-by-step configuration. ([source](https://github.com/design-patterns-in-ruby/design-patterns-in-ruby/blob/main/README.md))
- [Factory Method Patterns](https://awesome-repositories.com/f/software-engineering-architecture/creational-design-patterns/factory-method-patterns.md) — Demonstrates the factory method pattern to delegate object instantiation logic to specialized creator objects. ([source](https://github.com/design-patterns-in-ruby/design-patterns-in-ruby/blob/main/README.md))
- [Singleton Patterns](https://awesome-repositories.com/f/software-engineering-architecture/creational-design-patterns/singleton-patterns.md) — Shows how to implement the singleton pattern to ensure a class has only one global instance. ([source](https://github.com/design-patterns-in-ruby/design-patterns-in-ruby/blob/main/README.md))
- [Decorator Patterns](https://awesome-repositories.com/f/software-engineering-architecture/decorator-patterns.md) — Demonstrates the decorator pattern to dynamically extend object functionality by wrapping existing instances. ([source](https://github.com/design-patterns-in-ruby/design-patterns-in-ruby/blob/main/README.md))
- [Duck Typing Patterns](https://awesome-repositories.com/f/software-engineering-architecture/duck-typing-patterns.md) — Demonstrates how to leverage duck typing to create modular and reusable code by prioritizing object behavior over explicit class inheritance.
- [Notification Observation Patterns](https://awesome-repositories.com/f/software-engineering-architecture/notification-observation-patterns.md) — Implements observer-based event notification to decouple subjects from their dependents during state changes.
- [Singleton Patterns](https://awesome-repositories.com/f/software-engineering-architecture/object-instantiation-restrictions/singleton-patterns.md) — Demonstrates the singleton pattern to manage global state by restricting class instantiation to a single instance.
- [Software Architecture Education](https://awesome-repositories.com/f/software-engineering-architecture/software-architecture-education.md) — Illustrates how to solve common design problems through modular and reusable code structures.
- [Strategy-Based Delegation](https://awesome-repositories.com/f/software-engineering-architecture/software-architecture/architectural-patterns/layering-presentation/state-management-patterns/context-object-passing/strategy-based-delegation.md) — Encapsulates behavioral logic into interchangeable objects to modify execution at runtime.
- [Bridge Patterns](https://awesome-repositories.com/f/software-engineering-architecture/structural-design-patterns/bridge-patterns.md) — Provides examples of the bridge pattern to decouple abstractions from their implementations for independent variation. ([source](https://github.com/design-patterns-in-ruby/design-patterns-in-ruby/blob/main/README.md))
- [Proxy Patterns](https://awesome-repositories.com/f/software-engineering-architecture/structural-design-patterns/proxy-patterns.md) — Provides implementations of the proxy pattern to control access to objects through surrogates. ([source](https://github.com/design-patterns-in-ruby/design-patterns-in-ruby#readme))

### Part of an Awesome List

- [Application Architecture and Logic](https://awesome-repositories.com/f/awesome-lists/devtools/application-architecture-and-logic.md) — Organizes complex logic into reusable components to reduce technical debt in large Ruby systems.

### Development Tools & Productivity

- [Code Refactoring Tools](https://awesome-repositories.com/f/development-tools-productivity/code-refactoring-tools.md) — Provides techniques for refactoring and maintaining codebases by applying structural patterns that decouple dependencies.

### Programming Languages & Runtimes

- [Runtime Class Modifications](https://awesome-repositories.com/f/programming-languages-runtimes/dynamic-class-creation/runtime-class-modifications.md) — Shows how to reopen and modify existing classes at runtime to redefine methods without altering original source files.
- [Dynamic Method Dispatch](https://awesome-repositories.com/f/programming-languages-runtimes/dynamic-method-dispatch.md) — Illustrates the use of dynamic method dispatch to resolve method calls at runtime for flexible object-oriented behavior.