Nodejs Day Calculate subtractDays(days)

Method Source Code

//subtract days from a date
Date.prototype.subtractDays=function(days){
    if (arguments.length===1){
        if (typeof days !== 'number') return;
        this.setDate(this.getDate() - days);
        return this;
    }//from   w  ww . j  a v  a2 s .c  o m
    return this;
}

Related

1. setToMondayMidnight()

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

2. 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);
   ...
   

3. 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;
   };
   ...
   

4. subDays(value)

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

5. subtract(days)

   const times = [1000, 10000, 100000, 1000000, 5000000];
   let x = 0;
   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++;
   ...
   

6. yestoday(pattern)

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