mirror of https://github.com/shunfei/cronsun
35 lines
527 B
Go
35 lines
527 B
Go
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package utils
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import (
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"math/rand"
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"time"
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)
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// ASCII values 33 ~ 126
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const _dcl = 126 - 33 + 1
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var defaultCharacters [_dcl]byte
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func init() {
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for i := 0; i < _dcl; i++ {
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defaultCharacters[i] = byte(i + 33)
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}
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rand.Seed(time.Now().UnixNano())
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}
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func RandString(length int, characters ...byte) string {
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if len(characters) == 0 {
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characters = defaultCharacters[:]
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}
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n := len(characters)
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var rs = make([]byte, length)
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for i := 0; i < length; i++ {
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rs[i] = characters[rand.Intn(n-1)]
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}
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return string(rs)
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}
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