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Generate UUID in Golang
Universally Unique Identifier (UUID) is a 128-bit value that is used to uniquely identify objects or entities. UUID is widely used in computer systems for generating unique IDs for objects, documents, and data records. In Golang, we can generate UUID using the "github.com/google/uuid" package.
Installing the "github.com/google/uuid" Package
Before we can generate UUID in Golang, we need to install the "github.com/google/uuid" package. To install this package, run the following command in the terminal −
go get github.com/google/uuid
Generating UUID in Golang
Once we have installed the "github.com/google/uuid" package, we can use the "uuid" package to generate UUIDs. Here's an example code that demonstrates how to generate UUID in Golang −
Example
package main
import (
"fmt"
"github.com/google/uuid"
)
func main() {
// Generate a new UUID
u := uuid.New()
// Print the UUID
fmt.Println(u.String())
}
In the above code, we first import the "fmt" package and the "github.com/google/uuid" package. We then use the "uuid.New()" function to generate a new UUID and store it in the variable "u". Finally, we print the UUID using the "u.String()" function.
Generating Version 4 UUID in Golang
The "github.com/google/uuid" package also provides a way to generate Version 4 UUIDs. Version 4 UUIDs are generated using random numbers, and they are generally considered more secure than other versions of UUIDs.
Here's an example code that demonstrates how to generate Version 4 UUID in Golang −
Example
package main
import (
"fmt"
"github.com/google/uuid"
)
func main() {
// Generate a new Version 4 UUID
u := uuid.NewRandom()
// Print the UUID
fmt.Println(u.String())
}
In the above code, we use the "uuid.NewRandom()" function to generate a new Version 4 UUID and store it in the variable "u". Finally, we print the UUID using the "u.String()" function.
Conclusion
Generating UUID is a common task in computer systems, and Golang provides an easy way to generate UUID using the "github.com/google/uuid" package. In this article, we saw how to install the "github.com/google/uuid" package and how to use it to generate UUIDs in Golang. We also saw how to generate Version 4 UUIDs using the "uuid.NewRandom()" function.
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