### **生成数组**
在线1：<https://play.golang.org/>
在线2：<https://play.studygolang.com/>
```go
package main
import (
"encoding/json"
"fmt"
"math/rand"
"strings"
"time"
)
//在线1：https://play.golang.org/
//在线2：https://play.studygolang.com/
func init() {
t := time.Now().Add(time.Second * 1).UnixNano()
rand.Seed(t)
}
func main() {
ints(10) // 生成整数数组
chars(10) // 生成字符串数组
}
func ints(length int) {
if length <= 0 {
length = 10
}
var arr []int
for i := 0; i < length; i++ {
arr = append(arr, rand.Intn(100))
}
s, _ := json.Marshal(arr)
nums := strings.Trim(string(s), "[]")
fmt.Printf("%s{%s}\n", "var arr = []int", nums)
}
func chars(length int) {
if length <= 0 {
length = 10
}
var arr []string
for i := 0; i < length; i++ {
l := 1
t := rand.Intn(6)
if t > 0 {
l = t
}
arr = append(arr, monoStr(l))
}
for i := 0; i < len(arr); i++ {
arr[i] = fmt.Sprintf("\"%s\"", arr[i])
}
fmt.Printf("%s{%s}\n", "var chars = []string", strings.Join(arr, ","))
}
const letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
const (
letterIdxBits = 6 // 6 bits to represent a letter index
letterIdxMask = 1<<letterIdxBits - 1 // All 1-bits, as many as letterIdxBits
letterIdxMax = 63 / letterIdxBits // # of letter indices fitting in 63 bits
)
var src = rand.NewSource(time.Now().UnixNano())
func monoStr(n int) string {
b := make([]byte, n)
for i, cache, remain := n-1, src.Int63(), letterIdxMax; i >= 0; {
if remain == 0 {
cache, remain = src.Int63(), letterIdxMax
}
if idx := int(cache & letterIdxMask); idx < len(letterBytes) {
b[i] = letterBytes[idx]
i--
}
cache >>= letterIdxBits
remain--
}
return string(b)
}
```
