Go - Passing an array to a function receiving argument list

Question

How can I pass an array as interface{} argument list in go?

func Yalla(i...interface{}) {
    fmt.Println(i...)
}

func main() {
    Yalla(1,2,3)
    Yalla([]int{1,2,3})
}

Will output:

1 2 3 //good
[1 2 3] //bad

This:

Yalla([]int{1,2,3}...)

Will generate an error.

I know I can make a new interface array and assign the values one by one to solve this, but is there an elegant way to do it?

Answer 1

There is no elegant shortcut for converting from an array of integers to a slice of interface{}. You need to write the for loop.

The call

Yalla([...]int{1,2,3}...)

does not compile because an array of integers and a slice of interface{} are different types. You can easily create a slice over the array using [:]:

Yalla([...]int{1,2,3}[:]...)

but this does not solve the problem because a slice of integers and a slice of interface{} are different types as explained in the FAQ.

You either need to copy the values as shown in the FAQ, start with a slice of interface{}

Yalla([]interface{}{1,2,3}...)

or change the variadic argument type to int

func Yalla(i ...int) {

}

if that's what you are always passing.