Nodejs Week Get getWeekDayNameShort(lang)

Method Source Code

Date.prototype.getWeekDayNameShort = function(lang) {
    lang = lang && (lang in Date.locale) ? lang : 'de';
    return Date.locale[lang].day_names_short[this.getDay()];
};



Date.locale = {/* w w w. j  a  v  a2 s  .  c  o  m*/
    de: {
        month_names: ['Januar', 'Februar', 'M?', 'April', 'Mai', 'Juni', 'Juli', 'August', 'September', 'Oktober', 'November', 'Dezember'],
        month_names_short: ['Jan', 'Feb', 'M?, 'Apr', 'Mai', 'Jun', 'Jul', 'Aug', 'Sep', 'Okt', 'Nov', 'Dez'],
    
        day_names: ['Sonntag', 'Montag', 'Dienstag', 'Mittwoch', 'Donnerstag', 'Freitag', 'Samstag'],
        day_names_short: ['So', 'Mo', 'Di', 'Mi', 'Do', 'Fr', 'Sa']
    }
};

Related

1. getWeek()

   Date.prototype.getWeek = function () {
     var onejan = new Date(this.getFullYear(), 0, 1);
     var time   = this.getMilliseconds() +
                  this.getSeconds() * 1000 +
                  this.getMinutes() * 60 * 1000 +
                  this.getHours() * 60 * 60 * 1000;
     return Math.ceil((((this - onejan - time) / 86400000) + onejan.getDay() + 1) / 7);
   };
   

2. getWeek(dowOffset)

   Date.prototype.getWeek = function (dowOffset) {
       dowOffset = typeof(dowOffset) == 'int' ? dowOffset : 1; 
       var newYear = new Date(this.getFullYear(),0,1);
       var day = newYear.getDay() - dowOffset; 
       day = (day >= 0 ? day : day + 7);
     var daynum = Math.floor((this.getTime() - newYear.getTime() - 
     (this.getTimezoneOffset()-newYear.getTimezoneOffset())*60000)/86400000) + 1;
     var weeknum;
     if(day < 4) {
   ...
   

3. getWeek(dowOffset)

   Date.prototype.getWeek = function (dowOffset) {
     dowOffset = typeof(dowOffset) == 'int' ? dowOffset : 0; 
     var newYear = new Date(this.getFullYear(),0,1);
     var day = newYear.getDay() - dowOffset; 
     day = (day >= 0 ? day : day + 7);
     var daynum = Math.floor((this.getTime() - newYear.getTime() -
     (this.getTimezoneOffset()-newYear.getTimezoneOffset())*60000)/86400000) + 1;
     var weeknum;
     if(day < 4) {
   ...
   

4. getWeekDayName()

   Date.prototype.getWeekDayName = function(){
     return this.weekDayName()[this.getDay()];
   };
   Date.prototype.weekDayName = function(){
     return ['Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday'];
   };
   sec = 1000;
   min = 60*sec;
   hour = 60*min;
   ...
   

5. getWeekDayName(lang)

   Date.prototype.getWeekDayName = function(lang) {
       lang = lang && (lang in Date.locale) ? lang : 'de';
       return Date.locale[lang].day_names[this.getDay()];
   };
   Date.locale = {
       de: {
           month_names: ['Januar', 'Februar', 'M?', 'April', 'Mai', 'Juni', 'Juli', 'August', 'September', 'Oktober', 'November', 'Dezember'],
           month_names_short: ['Jan', 'Feb', 'M?, 'Apr', 'Mai', 'Jun', 'Jul', 'Aug', 'Sep', 'Okt', 'Nov', 'Dez'],
           day_names: ['Sonntag', 'Montag', 'Dienstag', 'Mittwoch', 'Donnerstag', 'Freitag', 'Samstag'],
   ...
   

6. getWeekNumber()

   Date.prototype.getWeekNumber = function(){
       const date = new Date(+this);
       date.setHours(0,0,0);
       date.setDate(date.getDate()+4-(date.getDay()||7));
       return Math.ceil((((date-new Date(date.getFullYear(),0,1))/8.64e7)+1)/7);
   };
   

7. getWeekNumber()

   Date.prototype.getWeekNumber = function(){
       var d = new Date(+this);
       d.setHours(0,0,0);
       d.setMilliseconds(0);
       d.setDate(d.getDate()+4-(d.getDay()||7));
       return Math.ceil((((d-new Date(d.getFullYear(),0,1))/8.64e7)+1)/7);
   };
   

8. getWeekNumber()

   Date.prototype.getWeekNumber = function(){
     var d = new Date(+this);
     d.setHours(0,0,0);
     d.setDate(d.getDate()+4-(d.getDay()||7));
     return Math.ceil((((d-new Date(d.getFullYear(),0,1))/8.64e7)+1)/7);
   };
   function(doc) {
     var docdate = new Date(doc.created_at);
     if (doc.type === "entry")
   ...
   

9. getWeekNumber()

   Date.prototype.getWeekNumber = function() {
       var target = new Date(this.valueOf());
       var dauNumber = (this.getDay() + 6) % 7;
       target.setDate(target.getDate() - dauNumber + 3);
       var jan4 = new Date(target.getFullYear(), 0, 4);
       var dayDiff = (target - jan4) / 86400000;
       if (new Date(target.getFullYear(), 0, 1).getDay() < 5) {
           return 1 + Math.ceil(dayDiff / 7);
       else {
           return Math.ceil(dayDiff / 7);