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Likelihood of collision using most significant bits of a UUID in Java
If I'm using Long uuid = UUID.randomUUID().getMostSignificantBits() how likely is it to get a collision. It cuts off the least significant bits, so there is a possibility that you run into a collision, right?
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How to generate a random alpha-numeric string?
...less likely than undetected errors from cosmic rays, etc.
Comparison with UUIDs
According to their specification, UUIDs are not designed to be unpredictable, and should not be used as session identifiers.
UUIDs in their standard format take a lot of space: 36 characters for only 122 bits of entro...
BLE协议—广播和扫描 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...; = 0x02, /* 设备16bit部分uuid */
BLE_AD_TYPE_16SRV_CMPL = 0x03, /* 设备16bit完整uuid */
BLE_AD_TYPE_32SRV_PART  ...
Is it safe to assume a GUID will always be unique?
..., for every cell in every person who has ever lived, there are 36 trillion UUIDs. You have about 10^14 cells in your body, and 106.5 billion people have ever lived. Or, 2.385 * 10^23 UUIDs for every cent in the US public debt.
– new123456
Aug 11 '11 at 1:47
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MAC地址可以连上，硬件通信时提示无效的UUID？ - 创客硬件开发 - 清泛IT社...
...，填了一个其他的非预期的地址，而通信时用的目标硬件uuid，匹配失败导致的。
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经测试，我们的硬件mac地址是：
E2:E0:5A:46:86:2F
使用MAC地址连接，一切功能正常。
这个 APP程序 使用透传UUID 还可以控制蓝牙模块的IO ...
Is there a unique Android device ID?
...r Blog entry that emmby's answer links to (namely, generating and saving a UUID#randomUUID()).
There are many answers to this question, most of which will only work "some" of the time, and unfortunately, that's not good enough.
Based on my tests of devices (all phones, at least one of which is not ...
How to Create Deterministic Guids
...s mentioned by @bacar, RFC 4122 §4.3 defines a way to create a name-based UUID. The advantage of doing this (over just using a MD5 hash) is that these are guaranteed not to collide with non-named-based UUIDs, and have a very (very) small possibility of collision with other name-based UUIDs.
There'...
Random hash in Python
... what you are looking for is a universal unique identifier.Then the module UUID in python is what you are looking for.
import uuid
uuid.uuid4().hex
UUID4 gives you a random unique identifier that has the same length as a md5 sum. Hex will represent is as an hex string instead of returning a uuid ...
Best way to generate random file names in Python
...s command), this will not do. In that case, you can do something like str(uuid.uuid4()) .
– Luca
Jul 23 '16 at 18:20
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How can I generate UUID in C#
I am creating an .idl file programmatically. How do I create UUIDs for the interfaces and Methods Programmatically.
5 Answ...