How is the usage of the Go UUID?

The uuid package in the Go language is a library used for generating and parsing Universally Unique Identifier (UUID). UUID is a 128-bit long identifier used for uniquely identifying information in distributed computing environments.

The main steps for using the uuid package are as follows:

1. Import the uuid package: To import the uuid package in Go code, you can use the statement import “github.com/google/uuid”.
2. Creating a UUID: By using the uuid.New() function, a new UUID can be generated. For example, u := uuid.New() will generate a new UUID and assign it to the variable u.
3. To obtain the string representation of a UUID: A UUID can be represented as a string, using the String() method to achieve this. For example, str := u.String() will convert the UUID u into a string and assign it to the variable str.
4. Parse a UUID: The function uuid.Parse() can be used to parse a UUID object from a string representation. For example, u, err := uuid.Parse(str) will parse the string str into a UUID object and assign it to variable u, with err being non-empty if parsing fails.
5. Using UUID: the generated UUID can be used to uniquely identify entities, as file names, as primary keys in a database, and so on. In actual usage, the UUID can be stored or transmitted as a string depending on the requirements.

In conclusion, the uuid package offers convenient functions for generating and parsing UUIDs, allowing Go language programs to ensure that the generated identifiers are unique.