Go generic function to find an array item

generic_find.go

// "generic" function to find an array item
package main

import (
	"fmt"
	"reflect"
)

func main() {
	ints := make([]int, 5)
	ints[0] = 10
	ints[1] = 20
	ints[2] = 30
	ints[3] = 40
	ints[4] = 50

	fmt.Printf("%d\n", find(ints, 30)) // output: 2
	fmt.Printf("%d\n", find(ints, 90)) // output: -1
}

func find(array interface{}, item interface{}) int {
	arrayValue := reflect.ValueOf(array)
	itemValue := reflect.ValueOf(item)
	for i := 0; i < arrayValue.Len(); i++ {
		if arrayValue.Index(i).Interface() == itemValue.Interface() {
			return i
		}
	}
	return -1
}