Golang function with interface as argument

main.go

package main

import "fmt"

// Play 
// http://play.golang.org/p/Hs59f-DNXp

func PrintAll(vals interface{}) {
    
    switch v := vals.(type) {
    case []string:
    	for _, val := range v {
		fmt.Println(val)
       	}
    case []int:
    	for _, val := range v {
            	fmt.Println(val)
    	}	
    }
    
}

func main() {
    names := []string{"stanley", "david", "oscar"}
    PrintAll(names)
    
    namesInts := []int{11111, 222222, 33333}
    PrintAll(namesInts)
}

Output

stanley
david
oscar
11111
222222

33333