Go Fundamentals and Practical Interfaces for Beginners (2-Hour Job-Ready Crash Course)
Master Go interfaces in just two hours, from core concepts to practical application, enabling you to write flexible, testable, and job-ready Go code.
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Understanding Go Interfaces: The Core Concepts
Unit 1: Go Basics Refresher
Go: The Basics
Unit 2: Introducing Interfaces
What's an Interface?
Implicit Implementation
Interface Zero Value
Unit 3: Interfaces in Action
Interface as a Type
Polymorphism with Interfaces
Decoupling Code
Practical Interface Usage: Standard Library & Dynamic Behavior
Unit 1: Standard Library Interfaces in Action
Meet io.Reader
Meet io.Writer
Reader & Writer Together
Meet fmt.Stringer
Stringer in Practice
Unit 2: Dynamic Behavior with Interfaces
What's Under the Hood?
Type Assertions
Type Switches
Empty Interface: Any Type
Empty Interface in Action
Building Flexible Go Applications with Interfaces
Unit 1: Interfaces for Testability & Maintainability
Why Interfaces for Tests?
Mocking with Interfaces
Dependency Injection Basics
DI in Action: Constructor
DI in Action: Method
Unit 2: Interfaces for Robust Error Handling
Error Interface Deep Dive
Custom Error Types
Wrapping Errors
Unwrapping & Is/As