Format Date with Roman letter - Node.js Date

Node.js examples for Date:Date Format

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Description

Format Date with Roman letter

Demo Code

Date.prototype.format = (function() {
  var/* ww  w  .ja  v  a2  s.  co m*/
    that, txts,
    roman = ['I', 'II', 'III', 'IV', 'V', 'VI', 'VII', 'VIII', 'IX', 'X', 'XI', 'XII'],
    addZero = function(num) {
      return num < 10 ? '0' + num : num;
    },
    na = function(n, z) {
      return n % z;
    },
    getDOY = function() {
      var onejan = new Date(that.getFullYear(), 0, 1);
      return Math.ceil((that - onejan) / 86400000);
    },
    getWOY = function() {
      var onejan = new Date(that.getFullYear(), 0, 1);
      return Math.ceil((((that - onejan) / 86400000) + onejan.getDay() + 1) / 7);
    },
    dateVal = function(all, found) {
      switch (found) {
        case 'DD':  return addZero(that.getDate());
        case 'D':  return that.getDate();
        case 'MM':  return addZero(that.getMonth() + 1);
        case 'M':  return that.getMonth() + 1;
        case 'R':  return roman[that.getMonth()];
        case 'YYYY': return that.getFullYear();
        case 'YY':  return that.getFullYear().toString().substr(2, 2);
        case 'hh':  return addZero(that.getHours());
        case 'h':  return that.getHours();
        case 'HH':  return addZero(na(that.getHours(), 12));
        case 'H':  return na(that.getHours(), 12);
        case 'mm':  return addZero(that.getMinutes());
        case 'm':  return that.getMinutes();
        case 'ss':  return addZero(that.getSeconds());
        case 's':  return that.getSeconds();
        case 'u':  return that.getMilliseconds();
        case 'U':  return that.getTime() / 1000;
        case 'W':  return that.getDay();
        case 'y':  return getDOY();
        case 'w':  return getWOY();
        case 'G':  return that.getTimezoneOffset();
        case 'a':  return that.getHours()>12 ? 'pm' : 'am';
        case '%x':  return txts.shift();
        default:  return '[ERROR]';
      }
    }
  ; // end var
  return function(str){
    that = this;
    txts = [].splice.call(arguments, 1);
    str = str.replace(/(DD|D|MM|M|R|YYYY|YY|hh|h|HH|H|mm|m|ss|s|u|U|W|y|w|G|a|%x)/g, dateVal);
    return str;
  };
}());

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