// Append a new interval onto the end of article.Visits func addHourInterval(article *m.Article, currentTime time.Time, currentVisits int) { // Round down newInterval := &m.TimeInterval{ currentVisits, currentTime, } currentLength := len(article.Visits) newVisits := make([]m.TimeInterval, currentLength+1, currentLength+1) for i := 0; i < currentLength; i++ { newVisits[i] = article.Visits[i] } newVisits[currentLength] = *newInterval article.Visits = newVisits }