Nodejs Day Calculate subtract(days)

Method Source Code

const times = [1000, 10000, 100000, 1000000, 5000000];
let x = 0;//from w ww  .  j  a v a 2  s . com

Date.prototype.subtract = function(days) {
   return new Date(this.setDate(this.getDate() - days));
}

for(i in times) {
   console.time('monkeypatch ' + times[i]);

   while (x < times[i]) {
      x++;
      let date = new Date().subtract(2);
   }

   console.timeEnd('monkeypatch ' + times[i]);
   x = 0;
}

Related

1. sGetDay()

   var weekdays = ["monday", "tuesday", "wednesday", "thursday", "friday", "saturday", "sunday"];
   Date.prototype.sGetDay = function() {
     return (this.getDay() + 6) %7;
   var d = new Date();
   var today = weekdays[d.sGetDay()];
   

2. setToMondayMidnight()

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

3. 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);
   ...
   

4. 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;
   };
   ...
   

5. subDays(value)

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

6. subtractDays(days)

   Date.prototype.subtractDays=function(days){
       if (arguments.length===1){
           if (typeof days !== 'number') return;
           this.setDate(this.getDate() - days);
           return this;
       return this;
   

7. yestoday(pattern)

   Date.prototype.yestoday = function(pattern){
       return this.past(pattern,1);
   };