     
 }
 
+
 func + (left: NSDate, right: NSDateComponents) -> NSDate {
     let calendar = NSCalendar.currentCalendar()
     var components = calendar.components(.YearCalendarUnit | .MonthCalendarUnit | .DayCalendarUnit | .HourCalendarUnit | .MinuteCalendarUnit | .SecondCalendarUnit, fromDate: left)

    components.second += right.second
    return calendar.dateFromComponents(components)!
}

func - (left: NSDate, right: NSDateComponents) -> NSDate {
    let calendar = NSCalendar.currentCalendar()

    return calendar.dateFromComponents(components)!
}


func > (left: NSDate, right: NSDate) -> Bool {
    let timeInterval = left.timeIntervalSinceDate(right)
    return timeInterval > 0
}


func < (left: NSDate, right: NSDate) -> Bool {
    let timeInterval = left.timeIntervalSinceDate(right)
    return timeInterval < 0
}


func >= (left: NSDate, right: NSDate) -> Bool {
    return (left > right) || (left == right)
}


func <= (left: NSDate, right: NSDate) -> Bool {
    return (left < right) || (left == right)
}

