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package random
import (
"math/rand"
"strings"
"time"
)
type (
Random struct {
}
)
// Charsets
const (
Uppercase = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
Lowercase = "abcdefghijklmnopqrstuvwxyz"
Alphabetic = Uppercase + Lowercase
Numeric = "0123456789"
Alphanumeric = Alphabetic + Numeric
Symbols = "`" + `~!@#$%^&*()-_+={}[]|\;:"<>,./?`
Hex = Numeric + "abcdef"
)
var (
global = New()
)
func New() *Random {
rand.Seed(time.Now().UnixNano())
return new(Random)
}
func (r *Random) String(length uint8, charsets ...string) string {
charset := strings.Join(charsets, "")
if charset == "" {
charset = Alphanumeric
}
b := make([]byte, length)
for i := range b {
b[i] = charset[rand.Int63()%int64(len(charset))]
}
return string(b)
}
func String(length uint8, charsets ...string) string {
return global.String(length, charsets...)
}
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