Learn the core concepts of Go interfaces - how to declare them, understand interface values, and work with the empty interface.

• Interface Type Declarations
• The Empty Interface
• Interface Values

How to extract concrete values from interface variables, branch on dynamic types, compose interfaces from smaller ones, and verify interface implementation at compile time in Go.

• Type Assertions
• Type Switches
• Interface Embedding
• Interface Satisfaction Checks

Learn the three key interface design idioms in Go - small interfaces, accepting interfaces and returning structs, and balancing generality.

• Small Interfaces
• Accept Interfaces Return Structs
• Interfaces And Generality

How Go interfaces evolved with generics, enabling type sets, basic and general interfaces, and the comparable constraint

• Interfaces As Type Sets
• Basic Vs General Interfaces
• The Comparable Constraint