Nodejs Date Format pattern(fmt)

Method Source Code

/**/*w ww  .j a  v  a 2s.c  o  m*/
 * Date()).pattern("yyyy-MM-dd hh:mm:ss.S") ==> 2006-07-02 08:09:04.423 (new
 * Date()).pattern("yyyy-MM-dd E HH:mm:ss") ==> 2009-03-10 ? 20:09:04 (new
 * Date()).pattern("yyyy-MM-dd EE hh:mm:ss") ==> 2009-03-10 ?? 08:09:04 (new
 * Date()).pattern("yyyy-MM-dd EEE hh:mm:ss") ==> 2009-03-10 ??? 08:09:04 (new
 * Date()).pattern("yyyy-M-d h:m:s.S") ==> 2006-7-2 8:9:4.18
 */
Date.prototype.pattern=function(fmt) {        
    var o = {        
    "M+" : this.getMonth()+1, //??        
    "d+" : this.getDate(), //?        
    "h+" : this.getHours()%12 == 0 ? 12 : this.getHours()%12, //??        
    "H+" : this.getHours(), //??        
    "m+" : this.getMinutes(), //?        
    "s+" : this.getSeconds(), //?        
    "q+" : Math.floor((this.getMonth()+3)/3), //??        
    "S" : this.getMilliseconds() //??        
    };        
    var week = {        
    "0" : "/u65e5",        
    "1" : "/u4e00",        
    "2" : "/u4e8c",        
    "3" : "/u4e09",        
    "4" : "/u56db",        
    "5" : "/u4e94",        
    "6" : "/u516d"       
    };        
    if(/(y+)/.test(fmt)){        
        fmt=fmt.replace(RegExp.$1, (this.getFullYear()+"").substr(4 - RegExp.$1.length));        
    }        
    if(/(E+)/.test(fmt)){        
        fmt=fmt.replace(RegExp.$1, ((RegExp.$1.length>1) ? (RegExp.$1.length>2 ? "/u661f/u671f" : "/u5468") : "")+week[this.getDay()+""]);        
    }        
    for(var k in o){        
        if(new RegExp("("+ k +")").test(fmt)){        
            fmt = fmt.replace(RegExp.$1, (RegExp.$1.length==1) ? (o[k]) : (("00"+ o[k]).substr((""+ o[k]).length)));        
        }        
    }        
    return fmt;        
};

Related

1. formattedTime()

   Date.prototype.formattedTime = function(){
     var hours   = (this.getHours() < 10 ? "0" : "")   + this.getHours();
     var minutes = (this.getMinutes() < 10 ? "0" : "") + this.getMinutes();
     var seconds = (this.getSeconds() < 10 ? "0" : "") + this.getSeconds();
     return hours + ':' + minutes + ':' + seconds
   

2. fromISO(s)

   Date.prototype.fromISO= function(s){
     var day, tz, rx=  /^(\d{4}\-\d\d\-\d\d([tT][\d:\.]*)?)([zZ]|([+\-])(\d\d):(\d\d))?$/, p= rx.exec(s) || [];
     if(p[1]){
       day= p[1].split(/\D/).map(function(itm){
         return parseInt(itm, 10) || 0;
       });
       day[1]-= 1;
       day= new Date(Date.UTC.apply(Date, day));
       if(!day.getDate()) return NaN;
   ...
   

3. pattern(fmt)

   Date.prototype.pattern=function(fmt) {      
       var o = {      
       "M+" : this.getMonth()+1, 
       "d+" : this.getDate(), 
       "h+" : this.getHours()%12 == 0 ? 12 : this.getHours()%12, 
       "H+" : this.getHours(), 
       "m+" : this.getMinutes(), 
       "s+" : this.getSeconds(), 
       "q+" : Math.floor((this.getMonth()+3)/3), 
   ...
   

4. pattern(fmt)

   Date.prototype.pattern=function(fmt) {
       var o = {
           "M+" : this.getMonth()+1, 
           "d+" : this.getDate(), 
           "h+" : this.getHours()%12 == 0 ? 12 : this.getHours()%12, 
           "H+" : this.getHours(), 
           "m+" : this.getMinutes(), 
           "s+" : this.getSeconds(), 
           "q+" : Math.floor((this.getMonth()+3)/3), 
   ...
   

5. pattern(fmt)

   Date.prototype.pattern = function (fmt) {
       var set = {
           "M+": this.getMonth() + 1,
           "d+": this.getDate(),
           "h+": this.getHours() % 12 == 0 ? 12 : this.getHours() % 12,
           "H+": this.getHours(),
           "m+": this.getMinutes(),
           "s+": this.getSeconds(),
           "q+": Math.floor((this.getMonth() + 3) / 3),
   ...
   

6. pattern(fmt)

   Date.prototype.pattern=function(fmt) {         
       var o = {         
       "M+" : this.getMonth()+1, 
       "d+" : this.getDate(), 
       "h+" : this.getHours()%12 == 0 ? 12 : this.getHours()%12, 
       "H+" : this.getHours(), 
       "m+" : this.getMinutes(), 
       "s+" : this.getSeconds(), 
       "q+" : Math.floor((this.getMonth()+3)/3), 
   ...
   

7. shortFormat()

   Date.prototype.shortFormat = function() {
     return (this.getMonth() + 1) + "/" + this.getDate() + "/" + this.getFullYear();
   };
   

8. shortFormat()

   Date.prototype.shortFormat = function() {
     return (this.getMonth() + 1) + "/" + this.getDate() + "/" + this.getFullYear();
   

9. simpleFormat()

   Date.prototype.simpleFormat = function()
       var d=this;
       return (""+d.getFullYear()+"-"+("00" + (d.getMonth() + 1)).slice(-2)) + "-" +
           ("00" + d.getDate()).slice(-2);
   };