func arrayUnique(arr []string) []string{
	size := len(arr)
	result := make([]string, 0, size)
	temp := map[string]struct{}{}
	for i:=0; i < size; i++ {
		if _,ok := temp[arr[i]]; ok != true {
			temp[arr[i]] = struct{}{}
			result = append(result, arr[i])
		}
	}
	return result
}