Interfaces in Go (part I)

Interfaces make the code more flexible, scalable and it’s a way to achieve polymorphism in Golang. Instead of requiring a particular type, interfaces allow to specify that only some behaviour is needed. Behaviour is defined by set of methods: type I interface { f1(name string) f2(name string) (error, float32) f3() int64 }No particular implementation is enforced. It’s enough that type defines metho