use strftime module instead of duplicating the code

lib/date.js

@@ -1,92 +1,17 @@
 // batteries
 // Copyright 2010 - 2011 Sami Samhuri <sami@samhuri.net>
 
-var DateExt = { format: format };
+var strftime = require('strftime').strftime
+  , batteries = require('./')
+  , DateExt = { format: format }
+  ;
 
 exports.extendNative = function() {
-  require('./ext').extend(Date, DateExt);
+  batteries.object.extendPrototype(Date, DateExt);
 };
 
-require('./object').extend(exports, DateExt);
+batteries.object.extend(exports, DateExt);
 
-function words(s) { return (s || '').split(' '); }
+function format(d, fmt, locale) {
-
+  return strftime.call(null, fmt, d, locale);
-var Weekdays = words('Sunday Monday Tuesday Wednesday Thursday Friday Saturday');
-var WeekdaysShort = words('Sun Mon Tue Wed Thu Fri Sat');
-var Months = words('January February March April May June July August September October November December');
-var MonthsShort = words('Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec');
-
-function format(d, fmt) {
-  return fmt.replace(/%(.)/, function(_, c) {
-      switch (c) {
-          case 'A': return Weekdays[d.getDay()];
-          case 'a': return WeekdaysShort[d.getDay()];
-          case 'B': return Months[d.getMonth()];
-          case 'b': // fall through
-          case 'h': return MonthsShort[d.getMonth()];
-          case 'D': return format(d, '%m/%d/%y');
-          case 'd': return pad(d.getDate());
-          case 'e': return d.getDate();
-          case 'F': return format(d, '%Y-%m-%d');
-          case 'H': return pad(d.getHours());
-          case 'I':
-              var hour = d.getHours();
-              if (hour == 0) hour = 12;
-              else if (hour > 12) hour -= 12;
-              return pad(hour);
-          case 'k': return pad(d.getHours(), ' ');
-          case 'l':
-              var hour = d.getHours();
-              if (hour == 0) hour = 12;
-              else if (hour > 12) hour -= 12;
-              return pad(hour, ' ');
-          case 'M': return pad(d.getMinutes());
-          case 'm': return pad(d.getMonth() + 1);
-          case 'n': return '\n';
-          case 'p': return d.getHours() < 12 ? 'AM' : 'PM';
-          case 'R': return format(d, '%H:%M');
-          case 'r': return format(d, '%I:%M:%S %p');
-          case 'S': return pad(d.getSeconds());
-          case 's': return d.getTime();
-          case 'T': return format(d, '%H:%M:%S');
-          case 't': return '\t';
-          case 'u':
-              var day = d.getDay();
-              return day == 0 ? 7 : day; // 1 - 7, Monday is first day of the week
-          case 'v': return format(d, '%e-%b-%Y');
-          case 'w': return d.getDay(); // 0 - 6, Sunday is first day of the week
-          case 'Y': return d.getFullYear();
-          case 'y':
-              var year = d.getYear();
-              return year < 100 ? year : year - 100;
-          case 'Z':
-              var tz = d.toString().match(/\((\w+)\)/);
-              return tz && tz[1] || '';
-          case 'z':
-              var off = d.getTimezoneOffset();
-              return (off < 0 ? '-' : '+') + pad(off / 60) + pad(off % 60);
-          default: return c;
-      }
-  });
-}
-
-function pad(n, padding) {
-    padding = padding || '0';
-    return n < 10 ? (padding + n) : n;
-}
-
-function month(d) {
-  return Months(d.getMonth());
-}
-
-function shortMonth(d) {
-  return MonthsShort(d.getMonth());
-}
-
-function weekday(d) {
-  return Weekdays(d.getDay());
-}
-
-function shortWeekday(d) {
-  return WeekdaysShort(d.getDay());
 }

package.json

@@ -24,6 +24,7 @@
 , "licenses": [
     {
       "type": "MIT",
+, "dependencies" : { "strftime" : "0.4.x" }
       "url": "https://github.com/samsonjs/batteries/raw/master/LICENSE"
     }
   ]