Beta
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UUID Generator #Character
UUID
About
- UUID
- 是通用唯一识别码（Universally Unique Identifier）的缩写，是一种软件建构的标准，亦为开放软件基金会组织在分布式计算环境领域的一部分。
- 重复机率
- 利用生日悖论，可计算出两笔UUID拥有相同值的机率约为 \(p(n) \approx 1-e^{-\frac{n^2}{2x}}\) 。与被陨石击中的机率比较的话，已知一个人每年被陨石击中的机率估计为170亿分之1，也就是说机率大约是0.00000000006 (6 x 10^-11)，等同于在一年内置立数十兆笔GUID并发生一次重复。换句话说，每秒产生10亿笔UUID，100年后只产生一次重复的机率是50%。如果地球上每个人都各有6亿笔GUID，发生一次重复的机率是50%。
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