# Functions
BytesToStr bytes转string.
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Explode 用一个字符串separator分割另外一个字符串str.
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Implode 切片转为指定字符串连接的为字符串.
Rand returns a random string.
RandId returns a random id string.
Randn returns a random string with length n.
Seed sets the seed to seed.
StrToBytes string转bytes.
SubStr string截取.