Create a list of random servers

random-servers.go

package main

import (
	"fmt"
	"hash/crc32"
)

func randomServers(token string, count int) []int {
	hTok := crc32.Checksum([]byte(token), crc32.IEEETable)
	val := uint32(hTok)

	// initialize array to select from
	ints := make([]int, count)
	for i := 0; i < count; i++ {
		ints[i] = i + 1
	}

	result := make([]int, 0, count)

	for i := count; i >= 2; i-- {
		// determine position and add to result
		m := val % uint32(i)
		result = append(result, ints[m])
		// remove item just appended to result
		ints = append(ints[0:m], ints[m+1:len(ints)]...)
	}
	
	// append last item
	return append(result, ints[0])
}

func main() {
	fmt.Println(randomServers("minio", 32)[:28])
	// Prints: [6 9 26 2 3 16 25 24 10 21 32 14 22 1 20 5 13 19 7 18 17 31 12 11 28 8 30 27]
	
	fmt.Println(randomServers("rocks", 32)[:28])
	// Prints: [21 29 26 12 14 10 9 13 18 2 20 22 6 16 1 5 11 25 31 24 3 7 19 4 27 30 8 32]
}