golang

default argument

In theory it’s not supported feature. In theory.

Let’s consider function foo

func foo(bar ...string) int {
    myVal := 0
    if len(bar) > 0 {
        myVal = bar[0]
    }
    return myVal
}

If function was invoked as foo() it will return 0. In case it was invoked as foo(5), it will return 5.

Is it used like that? Yes. In example in kubernetes/minikube