Interface

Learning Interfaces in Go: Concepts, Examples, and Best Practices

Interfaces are one of Go’s most important abstraction tools. An interface describes behavior as a set of method signatures. A concrete type satisfies an interface implicitly simply by implementing the required methods—there is no separate implements declaration. What Is an Interface? An interface is a set of methods. For example: type Speaker interface { Speak() string } type Person struct { Name string } func (p Person) Speak() string { return "Hello, my name is " + p.Name } Because Person has the required Speak() string method, it satisfies Speaker: