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//++++++++++++++++++++++++++++++++++++++++
//Fighting for great,share generate value!
//Build the best soft by golang,let's go!
//++++++++++++++++++++++++++++++++++++++++
//Author:ShirDon <http://www.shirdon.com>
//Email:hcbsts@163.com; 823923263@qq.com
//++++++++++++++++++++++++++++++++++++++++
package captchas_with_go
import (
"math/rand"
"time"
)
func init() {
rand.Seed(time.Now().UnixNano())
}
// rnd returns a non-crypto pseudorandom int in range [from, to].
func rnd(from, to int) int {
return rand.Intn(to+1-from) + from
}
// rndf returns a non-crypto pseudorandom float64 in range [from, to].
func rndf(from, to float64) float64 {
return (to-from)*rand.Float64() + from
}
func randStr(length int) string {
rst := ""
charset := "abcdefghijklmnopqrstuvwxyz1234567890"
for i := 0; i < length; i++ {
rst = rst + string(charset[rnd(0, len(charset)-1)])
}
return rst
}
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