Find the element in an array in golang

find_in_array.go

package main

import "fmt"
import "reflect"

func contains(val interface{}, array interface{}) (exists bool, index int) {
    exists = false
    index = -1

    switch reflect.TypeOf(array).Kind() {
    case reflect.Slice:
        s := reflect.ValueOf(array)

        for i := 0; i < s.Len(); i++ {
            if reflect.DeepEqual(val, s.Index(i).Interface()) == true {
                index = i
                exists = true
                return
            }
        }
    }

    return
}

func main() {
    names := []string{"A", "B", "C", "D", "E"}
    fmt.Println(contains("A", names))
    fmt.Println(contains("G", names))

    ints := []int{1, 4, 3, 2, 6}
    fmt.Println(contains(3, ints))
    fmt.Println(contains(95, ints))
}