Question 1

gofrs/uuid vs google/uuid which one should I use?

Accepted Answer

gofrs/uuid is more up-to-date with RFC-9562 and supports newer versions like v6 and v7, making it better for modern compliance. google/uuid is older but widely adopted; choose gofrs/uuid if you need the latest features or are migrating from satori/go.uuid.

Question 2

How to generate a UUID v4 in Go with gofrs/uuid?

Accepted Answer

Import github.com/gofrs/uuid/v5 and use the uuid.NewV4() function, which returns a UUID and an error. Handle errors as shown in the README example, such as logging or panicking with uuid.Must() for package-level variables.

Question 3

Is gofrs/uuid thread-safe for concurrent use?

Accepted Answer

Yes, the package is thread-safe because it relies on Go's standard library functions for randomness and time, which are designed for concurrency. However, always verify with specific version documentation, especially for custom implementations.

Question 4

What's the difference between UUID version 6 and version 7?

Accepted Answer

Both are k-sortable, but v6 is field-compatible with v1, using timestamp and MAC address, while v7 uses a timestamp without MAC for better privacy and sortability. Refer to RFC-9562 for detailed specifications on their structures and use cases.

Question 5

How to migrate from satori/go.uuid to gofrs/uuid?

Accepted Answer

Change the import path to github.com/gofrs/uuid/v5 and update API calls if needed; the APIs are similar, but test thoroughly as there might be subtle differences due to fixes for critical flaws in the original package.

Question 6

Does gofrs/uuid support nil UUIDs or special values?

Accepted Answer

Yes, the package provides uuid.Nil for representing nil UUIDs and includes validation in parsing functions to ensure compliance with standards, but check the GoDoc for specific handling in edge cases.

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