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[NEW] DateExt.format (like strftime)

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Sami Samhuri 2010-11-21 20:24:02 -08:00
parent b7c529d965
commit aab79b849f
1 changed files with 98 additions and 0 deletions
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lib/date-ext.js Normal file
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exports.extendNative = function() {
Object.keys(DateExt).forEach(function(k) {
if (Date.prototype[k]) return; // don't overwrite existing members
Date.prototype[k] = function() {
var fn = DateExt[k]
, args = [].slice.call(arguments)
;
args.shift(this);
fn.apply(DateExt, args);
};
});
};
var Weekdays = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday',
'Friday', 'Saturday'];
var WeekdaysShort = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'];
var Months = ['January', 'February', 'March', 'April', 'May', 'June', 'July',
'August', 'September', 'October', 'November', 'December'];
var MonthsShort = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug',
'Sep', 'Oct', 'Nov', 'Dec'];
function pad(n, padding) {
padding = padding || '0';
return n < 10 ? (padding + n) : n;
}
var DateExt = {
// FIXME write a c extension that uses strftime to do the heavy lifting
format: function(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 DateExt.format(d, '%m/%d/%y');
case 'd': return pad(d.getDate());
case 'e': return d.getDate();
case 'F': return DateExt.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 DateExt.format(d, '%H:%M');
case 'r': return DateExt.format(d, '%I:%M:%S %p');
case 'S': return pad(d.getSeconds());
case 's': return d.getTime();
case 'T': return DateExt.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 DateExt.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;
}
});
},
month: function(d) {
return Months(d.getMonth());
},
shortMonth: function(d) {
return MonthsShort(d.getMonth());
}
weekday: function(d) {
return Weekdays(d.getDay());
},
shortWeekday: function(d) {
return WeekdaysShort(d.getDay());
}
};
exports.DateExt = DateExt;