Meaning of …interface{} (dot dot dot interface)

Question

Below is a piece of Go code I have question about. Specifically, what is a in this function?

func DPrintf(format string, a ...interface{}) (n in         


        

Answer 1

As far as the interface{} term, it is the empty interface. In other words, the interface implemented by all variables in Go.

This is sort of analogous to java.lang.Object or System.Object in C#, but is instead inclusive of every variable type in the language. So it lets you pass in anything to the method.