Nodejs Day of Week getDayOfWeek()

Method Source Code

var weekday = new Array(7);
weekday[0] = "Sunday";
weekday[1] = "Monday";
weekday[2] = "Tuesday";
weekday[3] = "Wednesday";
weekday[4] = "Thursday";
weekday[5] = "Friday";
weekday[6] = "Saturday";

Date.prototype.getDayOfWeek = function() {
    return weekday[this.getDay()]; }

Date.prototype.getDayOfYear = function() {
    var onejan = new Date(this.getFullYear(),0,1);
    return Math.ceil((this - onejan) / 86400000); }

Related

1. dayOfWeek()

   Date.prototype.dayOfWeek = function(){
     var days = ["Sunday", "Monday", "Tuesday", "Wednesday",
                 "Thursday", "Friday", "Saturday"];
     return days[this.getDay()];
   

2. getDayOfWeek()

   Date.prototype.getDayOfWeek = function(){   
       return ["Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"][ this.getDay() ];
   };
   Date.prototype.getDayNum = function(){ 
       let day = this.getDay()
       if(day == 0) day = 7
       return day;
   };
   

3. getDayOfWeek()

   Date.prototype.getDayOfWeek = function() {
     var days = [
       "Sonntag",
       "Montag",
       "Dienstag",
       "Mittwoch",
       "Donnerstag",
       "Freitag",
       "Samstag"
   ...
   

4. getDayOfWeek(d)

   Date.prototype.getDayOfWeek = function(d) {
     var days = ["Sun", "Mon", "Tue", "Wed", 
         "Thu", "Fri", "Sat"];
     return days[d];