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nicedate.js
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nicedate.js
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/*
* NICE DATE.js
* provides function "nicedate()" to to format dates (clocks or calendars)
*
* `nicedate` is called with two arguments, `format` (required) and
* optionally a `Date`. formats use strftime() syntax.
*
* first argument `format` is a string using `strftime`s syntax
* (http://strftime.org) without the "%" symbol
*
* the second argument is a Date object, but if not present, it
* defaults to the current date and time
* https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date
*
* how to use:
* 1) include nicedate.js in your html
* <script src="nicedate.js"></script>
* 2) call the function `nicedate()`!
*
*
* consider the following timestamp:
* Monday, September 30th 2013, 07:06:05 AM
*
* YOU TYPE | YOU GET
* --------------------+-------------------
* nicedate('H:M:S') | 07:06:05
* nicedate('H:M p') | 07:06 AM
* nicedate('a, b d') | Mon, Sep 30
* nicedate('Y-m-d') | 2013-09-30
* nicedate('d/m/y') | 30/09/13
* nicedate('m/d') | 09/30
*
*
* function nicedate(String format, Date time)
* ^^^^^^ ^^^^
* | |
* | the desired timestamp, if none is
* | provided the current time is used
* the format string, it accepts most strftime()
* parameters, but without the % symbol
*
*
* example: how to make a clock
* <h2 id="my-clock"></h2>
* <script>
* var myClock = document.getElementById('my-clock');
*
* setInterval(function update() {
* myClock.innerHTML = nicedate('H:M:S')
* }, 1000)
* </script>
*
* also, you can modify DATE_LOCALE to fit your language
*
*
* developer note:
* nicedate('a A w d b B m y Y H I p M S f', new Date(2013, 8, 30, 7, 6, 5))
* should return:
* 'Mon Monday 1 30 Sep September 09 13 2013 07 07 AM 06 05 000000'
*
* extra note:
* strftime is used by c / python / perl / php / ruby
*
*/
var DATE_LOCALE = {
weekdayFull: 'Sunday,Monday,Tuesday,Wednesday,Thrusday,Friday,Saturday'.split(','),
weekdayShort: 'Sun,Mon,Tue,Wed,Thr,Fri,Sat'.split(','),
monthFull: 'January,February,March,April,May,June,July,August,September,October,November,December'.split(','),
monthShort: 'Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec'.split(',')
};
function nicedate(format, date) {
if (!date || typeof date.getMonth !== 'function') {
date = new Date();
}
function pad(str, n) {
str = str + '';
if (n < str.length)
return str;
return ('00000000' + str).substr(-n);
}
var result = '';
for (var i = 0; i < format.length; i++) {
var letter = format[i];
switch (letter) {
// weekday, short (Mon)
case 'a':
result += DATE_LOCALE.weekdayShort[date.getDay()]
break;
// weekday, full (Monday)
case 'A':
result += DATE_LOCALE.weekdayFull[date.getDay()];
break;
// weekday, number (0=sunday, 1=monday, ...)
case 'w':
result += date.getDay();
break;
// day (00 - 31)
case 'd':
result += pad(date.getDate(), 2);
break;
// month, short (Sep)
case 'b':
var month = date.getMonth();
result += DATE_LOCALE.monthShort[month];
break;
// month, full (September)
case 'B':
var month = date.getMonth();
result += DATE_LOCALE.monthFull[month];
break;
// month, number (01 - 12)
case 'm':
var month = date.getMonth() + 1;
result += pad(month, 2);
break;
// year, no century (13)
case 'y':
var year = '' + date.getFullYear();
result += pad(year.substr(-2), 2);
break;
// year (2013)
case 'Y':
result += date.getFullYear();
break;
// hour (00 - 23)
case 'H':
result += pad(date.getHours(), 2);
break;
// hour (01 - 12)
case 'I':
var hour = date.getHours();
if (hour > 12)
hour -= 12;
result += pad(hour, 2);
break;
// AM or PM
case 'p':
var hour = date.getHours();
if (hour < 12)
result += 'AM';
else
result += 'PM';
break;
// minute
case 'M':
result += pad(date.getMinutes(), 2);
break;
// second
case 'S':
result += pad(date.getSeconds(), 2);
break;
// microsecond (1 second = 1000 milliseconds = 1000 000 microseconds)
case 'f':
var microseconds = date.getMilliseconds() * 1000;
result += pad(microseconds, 6);
break;
case '%':
break;
default:
result += letter;
}
}
return result;
}