Learn how Go types satisfy interfaces automatically without explicit keywords, enabling flexible and decoupled code.

Mastering Implicit Interface Implementation and Structural Typing

Explore the standard library's core philosophy for creating flexible function inputs while maintaining powerful concrete outputs.

Designing Robust APIs with 'Accept Interfaces, Return Structs'

Understand how to build complex behaviors by combining small, focused interfaces into powerful abstractions.

Scaling Codebases with Interface Composition and Embedding

Discover how interfaces allow you to isolate dependencies and write reliable tests using mocks and fakes.

Using Interfaces to Simplify Mocking and Unit Testing

Learn to use the empty interface and type switches to recover concrete types and handle dynamic data securely.

Safely Handling Dynamic Types with Type Assertions

Go interfaces enable implicit polymorphism and clean architectural decoupling by focusing on behavior rather than structure. They are essential for building scalable, testable, and maintainable applications.

Go Interfaces

Mastering Implicit Interface Implementation and Structural Typing

Designing Robust APIs with 'Accept Interfaces, Return Structs'

Scaling Codebases with Interface Composition and Embedding

Using Interfaces to Simplify Mocking and Unit Testing

Safely Handling Dynamic Types with Type Assertions