Swift extension on NSTimeInterval and NSDate to make NSDate Comparable and to make working with dates in general more concise

DateUtils.swift

/*
    Examples:

    var date: NSDate
    date = 10.seconds.fromNow
    date = 30.minutes.ago
    date = 2.days.from(someDate)
    date = NSDate() + 3.days

    if dateOne < dateTwo {
        // dateOne is older than dateTwo
    }

    if dateOne > dateTwo {
        // dateOne is more recent than dateTwo
    }

    if dateOne <= dateTwo {
        // dateOne is older than or equal to dateTwo
    }

    if dateOne >= dateTwo {
        // dateOne is more recent or equal to dateTwo
    }

    if dateOne == dateTwo {
        // dateOne is equal to dateTwo
    }
*/

extension NSDate: Comparable {
    
}

func + (date: NSDate, timeInterval: NSTimeInterval) -> NSDate {
    return date.dateByAddingTimeInterval(timeInterval)
}

public func ==(lhs: NSDate, rhs: NSDate) -> Bool {
    if lhs.compare(rhs) == .OrderedSame {
        return true
    }
    return false
}

public func <(lhs: NSDate, rhs: NSDate) -> Bool {
    if lhs.compare(rhs) == .OrderedAscending {
        return true
    }
    return false
}

extension NSTimeInterval {
    var second: NSTimeInterval {
        return self.seconds
    }
    
    var seconds: NSTimeInterval {
        return self
    }
    
    var minute: NSTimeInterval {
        return self.minutes
    }
    
    var minutes: NSTimeInterval {
        let secondsInAMinute = 60 as NSTimeInterval
        return self * minutesInASecond
    }
    
    var day: NSTimeInterval {
        return self.days
    }
    
    var days: NSTimeInterval {
        let secondsInADay = 86_400 as NSTimeInterval
        return self * secondsInADay
    }
    
    var fromNow: NSDate {
        let timeInterval = self
        return NSDate().dateByAddingTimeInterval(timeInterval)
    }
    
    func from(date: NSDate) -> NSDate {
        let timeInterval = self
        return date.dateByAddingTimeInterval(timeInterval)
    }
    
    var ago: NSDate {
        let timeInterval = self
        return NSDate().dateByAddingTimeInterval(-timeInterval)
    }
}

I think there's a typo error on these lines:

var minutes: NSTimeInterval {
    let secondsInAMinute = 60 as NSTimeInterval
    return self * secondsInAMinute
}

you need to use the secondsInAMinute variable.

Should be divided by instead of multiplied as well.