Nodejs Day Calculate sGetDay()

Method Source Code

/**//from w  w w.ja  v  a 2  s .  c  om
 * Color today
 */
var weekdays = ["monday", "tuesday", "wednesday", "thursday", "friday", "saturday", "sunday"];

// week start on monday
Date.prototype.sGetDay = function() {
  return (this.getDay() + 6) %7;
}
var d = new Date();
var today = weekdays[d.sGetDay()];

Related

1. isLastDay()

   Date.prototype.isLastDay = function(){
       if(!this.isToDay()){
           var today = new Date();
           return this.getTime() < today.getTime();
       return false;
   };
   

2. nextDayfunciton()

   Date.prototype.nextDay = funciton() {
     let today = this.getDate();
     return new Date(this.setDate(today + 1));
   

3. numDays()

   Date.prototype.numDays = function() {
     var d = new Date(this.getFullYear(), this.getMonth() + 1, 0);
     return d.getDate();
   };
   

4. past(pattern,pastDays)

   Date.prototype.past = function(pattern,pastDays){
       var pastday = new Date((this - 0) - 1000*60*60*24*pastDays);
       var pattern = pattern;    
       var dateObj = {
           "Y" : pastday.getFullYear(),
           "M" : pastday.getMonth()+1,
           "D" : pastday.getDate(),
           "h" : pastday.getHours(),
           "m" : pastday.getMinutes(),
   ...
   

5. relativeDays()

   Date.prototype.relativeDays = function() {
     var now = new Date();
     var interval = now.getTime() - this.getTime();
     interval = Math.floor(interval / (1000 * 60 * 60 * 24));
     return interval;
   };
   

6. setToMondayMidnight()

   Date.prototype.setToMondayMidnight = function() {
       var weekDay = this.getDay();
       if (weekDay === 0) { 
           weekDay = 7;
       this.setDate(this.getDate() - weekDay + 1);
       this.timeToMidnight();
   };
   

7. shiftDays(days)

   Date.prototype.shiftDays = function(days){    
     days = parseInt(days, 10);
     this.setDate(this.getDate() + days);
     return this;
   $date = new Date(2014, 9, 16,0,1);
   $date.shiftDays(1);
   console.log($date-"");
   $date.shiftDays(1);
   ...
   

8. subDays(value)

   Date.parseDate = function (date, format) {
     if (format === undefined)
       format = 'Y-mm-dd';
     return new Date(moment(date, format).valueOf());
   };
   Date.prototype.subDays = function (value) {
     this.setDate(this.getDate() - value);
     return this;
   };
   ...
   

9. subDays(value)

   Date.prototype.subDays = function(value) {
     this.setDate(this.getDate() - value);
     return this;
   };