The "8-4-4-4-12" format is just for reading by humans. The UUID is really a 128-bit number. Consider the string format requires the double of the bytes than the 128 bit number when stored or in memory. I would suggest to use the number internally and when it needs to be shown on a UI or exported in a file, use the string format.

2009年8月12日 · UUID stands for Universally Unique IDentifier. It's a 128-bit value used for a unique identification in software development. UUID is the same as GUID (Microsoft) and is part of the Distributed Computing Environment (DCE), …

2018年5月6日 · type: string format: uuid From the Data Types section (emphasis mine): Primitives have an optional modifier property: format. OAS uses several known formats to define in fine detail the data type being used. However, to support documentation needs, the format property is an open string-valued property, and can have any value.

2022年8月6日 · The uuid module provides immutable UUID objects (the UUID class) and the functions uuid1(), uuid3(), uuid4(), uuid5() for generating version 1, 3, 4, and 5 UUIDs as specified in RFC 4122.

I'm searching for UUIDs in blocks of text using a regex. Currently I'm relying on the assumption that all UUIDs will follow a patttern of 8-4-4-4-12 hexadecimal digits.

2023年3月8日 · For example, the uuid-ossp extension often bundled with Postgres. That extension can generates Versions 1, 3, and 4 values and additionally a couple variations: uuid_generate_v1mc() – generates a version 1 UUID but uses a random multicast MAC address instead of the real MAC address of the computer.

2011年10月26日 · Currently, UUID's are as specified in RFC4122. An often neglected edge case is the NIL UUID, noted here. The following regex takes this into account and will return a match for a NIL UUID. See below for a UUID which only accepts non-NIL UUIDs. Both of these solutions are for versions 1 to 5 (see the first character of the third block).

2021年10月10日 · I know that the format of uuid is XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX. But I dont want to create a uuid, I want to create a unique identifier with a different format such as XXX-XXXX-XXX. How do I do that using plain javascript and no libraries. And is there any way to ensure that the identifier will be unique?

2008年10月29日 · The information above does not go into the details of the UUID/GUID values, or how you get/generate them. But there are two misconceptions about the values that should be cleared up. 1. Representation of UUID/GUIDs. Firstly, the same UUID/GUID is a 16 bytes (128 bits) value that can be represented in different ways.

2013年11月18日 · It's reasonable to handle it there if, in the context of your application, you expect to have a UUID and it would be exceptional for the string to be an invalid format. On the other hand, if your application is a parser, and the grammar accepted UUIDs and identifiers of other types at a particular alternative, testing the format like this would ...