code: func countNewTags(currTags []string, newTags []string) int {
  	if len(newTags) == 0 {
  		return 0
  	}
  
  	if len(currTags) == 0 {
  		return len(newTags)
  	}
  
  	newTagCount := 0
  
  	for _, newTag := range newTags {
  		found := false
  		for _, currTag := range currTags {
  			if newTag == currTag {
  				found = true
  				break
  			}
  		}
  		if !found {
  			newTagCount++
  		}
  	}
  
  	return newTagCount
  }
docs: // countNewTags returns a count of new tags which do not exist in the current list of tags