Golang : Randomly pick an item from a slice/array example
Problem:
You are building a game and you want to randomly pick an item from a slice of URLs. How to pick one item at random?
Solution:
You can either shuffle the items inside the slice and pick the first item or use the code example below.
pickRandomURL.go
package main
import (
"fmt"
"math/rand"
"time"
)
func main() {
URLs := []string{
"http://top-beautiful-women.com/images/1/Japan/Erina%20Mano.jpg",
"http://top-beautiful-women.com/images/1/Japan/Rina%20Uchiyama.jpg",
"http://cdn2.stylecraze.com/wp-content/uploads/2013/06/yui-aragaki.jpg",
"http://cdn2.stylecraze.com/wp-content/uploads/2013/06/rio-yamashita.jpg",
}
// randomly pick one beautiful girl(URL) from the URLs slice
rand.Seed(time.Now().UnixNano())
choosen := URLs[rand.Intn(len(URLs))]
fmt.Println("Randomly selected this URL : ", choosen)
}
Output:
>go run pickRandomURL.go
Randomly selected this URL : http://cdn2.stylecraze.com/wp-content/uploads/2013/06/yui-aragaki.jpg
>go run pickRandomURL.go
Randomly selected this URL : http://top-beautiful-women.com/images/1/Japan/Erina%20Mano.jpg
References:
https://www.socketloop.com/tutorials/golang-how-to-shuffle-elements-in-array-or-slice
See also : Golang : How to shuffle elements in array or slice?
By Adam Ng
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