compareDatesWithCalendar.swift

func calculatePushupsToday() {
        //get todays date
        let calendar = NSCalendar.current
        var todaysPushupNumber = 0
        for workout in myArray {
            //see if any of the entries = today
            if calendar.isDateInToday(workout.dateOfSave) == true
            {
                //add them up.
                todaysPushupNumber = todaysPushupNumber + workout.numberOfPushups
            }
        } //end for workout loop
        let todaysPushupLabelText : String = String(todaysPushupNumber) + " pushups today"
        pushupsTodayLabel.text = String(todaysPushupLabelText)
    } //end calculatePushupsToday