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func SubString(str string, begin, end int) string {
rs := []rune(str)
length := len(rs)
if begin < 0 {
begin = 0
}
if begin >= length {
return ""
}
if end > length {
return string(rs[begin:])
}
return string(rs[begin:end])
}
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原文地址:http://my.oschina.net/u/1778309/blog/494126