How to range over interface{} which stores a slice in Go?

Question

Given the scenario where you have a function which accepts t interface{}. If it is determined that the t is a slice, how do I range over that slice? 

I will not know the incoming type, such as []string, []int or []MyType, at compile time.
func main() {
    data := []string{"one","two","three"}
    test(data)
    moredata := []int{1,2,3}
    test(data)
}

func test(t interface{}) {
    switch reflect.TypeOf(t).Kind() {
    case reflect.Slice:
        // how do I iterate here?
        for _,value := range t {
            fmt.Println(value)
        }
    }
}

Go Playground Example: http://play.golang.org/p/DNldAlNShB

Gopher · Accepted Answer

package main import "fmt" import "reflect" func main() { data := []string{"one","two","three"} test(data) moredata := []int{1,2,3} test(moredata) } func test(t interface{}) { switch reflect.TypeOf(t).Kind() { case reflect.Slice: s := reflect.ValueOf(t) for i := 0; i < s.Len(); i++ { fmt.Println(s.Index(i)) } } } Go Playground Example: http://play.golang.org/p/gQhCTiwPAq You don't need to use reflection if you know which types to expect. You can use a type switch.

Go Language

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