generate random slice key from go

rand_key.go

package main

import (
	"fmt"
	"math/rand"
	"time"
)

func main() {
	box := []string{"a", "b", "c", "d", "e", "f", "g", "h", "i", "j"}
	fmt.Println("len:", len(box))

	fmt.Println("Unix:", time.Now().Unix())
	fmt.Println("UnixNano:", time.Now().UnixNano())
	rand.Seed(time.Now().UnixNano())
	for i := 0; i < 50; i++ {
		k := rand.Intn(len(box))
		fmt.Println("key:", k)
		fmt.Println("box:", box[k])
	}
}

result

len: 10
Unix: 1257894000
UnixNano: 1257894000000000000
key: 0
box: a
key: 8
box: i
key: 7
box: h
key: 2
box: c
key: 3
box: d
key: 9
box: j
key: 4
box: e
key: 7
box: h
key: 8
box: i
key: 4
box: e
key: 2
box: c
key: 5
box: f
key: 9
box: j
key: 5
box: f
key: 2
box: c
key: 2
box: c
key: 4
box: e
key: 8
box: i
key: 8
box: i
key: 8
box: i
key: 6
box: g
key: 8
box: i
key: 0
box: a
key: 8
box: i
key: 4
box: e
key: 6
box: g
key: 9
box: j
key: 4
box: e
key: 0
box: a
key: 7
box: h
key: 9
box: j
key: 9
box: j
key: 1
box: b
key: 2
box: c
key: 7
box: h
key: 7
box: h
key: 4
box: e
key: 7
box: h
key: 7
box: h
key: 9
box: j
key: 0
box: a
key: 0
box: a
key: 3
box: d
key: 3
box: d
key: 7
box: h
key: 9
box: j
key: 5
box: f
key: 5
box: f
key: 9
box: j
key: 2
box: c