How to get a Random Item in a Set in Go

How to get a Random Item in a Set in Go ?

Answer

To get a random item from a set in Go, you can convert the set to a slice and then use the math/rand package to generate a random index.

✐ Examples

1 Get Random Item from Set

In this example,

We import the necessary packages: fmt, math/rand, and time.
We create a Set named mySet containing elements.
We convert the Set to a slice using a loop.
We set the seed for random number generation using rand.Seed.
We generate a random index within the range of the slice's length using rand.Intn.
We retrieve the random item from the slice using the random index.
Finally, we print the random item to standard output.

Go Program

package main

import (
    "fmt"
    "math/rand"
    "time"
)

func main() {
    rand.Seed(time.Now().UnixNano())
    mySet := map[string]bool{"Apple": true, "Banana": true, "Orange": true, "Mango": true}

    var mySlice []string
    for key := range mySet {
        mySlice = append(mySlice, key)
    }

    randomIndex := rand.Intn(len(mySlice))
    randomItem := mySlice[randomIndex]

    fmt.Println("Random item from set:", randomItem)
}

Output

Random item from set: Mango

Summary

In this tutorial, we learned How to get a Random Item in a Set in Go language with well detailed examples.

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