How to generate and work with UUIDs (Universally Unique Identifiers) in Go?

In Go, you can generate and work with UUIDs (Universally Unique Identifiers) using the github.com/google/uuid package. Here's how you can use it:

Install the uuid package using the following command:

go get github.com/google/uuid

Import the uuid package in your Go code:

import "github.com/google/uuid"

Generating a UUID:

uid := uuid.New()
fmt.Println(uid.String()) // Print the generated UUID as a string

Parsing a UUID from a string:

uid, err := uuid.Parse("da725c02-54bd-4a77-bdb6-6e8b8a2a43b4")
if err != nil {
    fmt.Println("Failed to parse UUID:", err)
}
fmt.Println(uid)

Comparing UUIDs for equality:

uid1 := uuid.New()
uid2 := uuid.New()
if uid1 == uid2 {
    fmt.Println("UUIDs are equal")
} else {
    fmt.Println("UUIDs are not equal")
}

Generating a version 5 UUID (based on SHA-1 hash):

nsUUID := uuid.MustParse("892ab431-763a-4391-b0d2-9f0277f41878") // Namespace UUID
name := "example.com"
uid := uuid.NewSHA1(nsUUID, []byte(name))
fmt.Println(uid)

Generating a version 3 UUID (based on MD5 hash):

nsUUID := uuid.MustParse("892ab431-763a-4391-b0d2-9f0277f41878") // Namespace UUID
name := "example.com"
uid := uuid.NewMD5(nsUUID, []byte(name))
fmt.Println(uid)

Keep in mind that the uuid package provides different versions (3, 4, and 5) of UUIDs. Version 4 UUIDs are randomly generated, while versions 3 and 5 are based on hash algorithms.

That's it! You now have the basic knowledge of generating and working with UUIDs in Go using the uuid package.