String Shuffle in Go

strshuffle.go

// StrShuffle shuffles a string that is passed to it
func StrShuffle(str string) string {
    n := 25 + rand.Intn(25)
    var runes []rune
    for _, runeval := range str {  
        runes = append(runes, runeval)
    }
    var shuffle = func() bool {
        if rand.Intn(2) == 1 {
            return true
        }
        return false
    }
    var repeat = func() {
        for i := 0; i < len(runes) - 1; i++ {
            if shuffle() {
                temp := runes[i]
                runes[i] = runes[i + 1]
                runes[i + 1] = temp 
            }
        }
        n--
    }
    for n > 0 {
        repeat()
    }
    return string(runes)
}