On: From Node.js to Go

[skj]

I think it's important to think of these features in terms of their smallest possible descriptions. One mistake with Java, I think, is that "inheritance" is how you do both polymorphism and composition (I know you can do either without inheritance, but it's especially a pain to do composition without).

With Go, polymorphism is done with interfaces. Composition is done with embedded fields (and the very convenient method promotion).