What are interfaces in Go and how do they compare to other languages?

What are interfaces in Go and how do they work?

Interfaces in Go are types that specify a contract by defining methods. Any type that implements those methods satisfies the interface.

How do interfaces in Go differ from interfaces in Java?

In Go, interfaces are satisfied implicitly, meaning a type doesn't need to declare that it implements an interface. In Java, a class must explicitly declare that it implements an interface.

Can you give an example of an interface in Go?

Sure! Here's a simple example:

type Speaker interface {
    Speak() string
}

type Dog struct {}

func (d Dog) Speak() string {
    return "Woof!"
}

In this example, Dog implements the Speaker interface.

What are the advantages of using interfaces in Go?

Interfaces promote loose coupling and allow for more flexible code. They enable polymorphism, making it easier to write generic functions.