dansk version .getWeekNumber()
Week number is not something used in many other countries than Denmark. Therefore the fewest programming languages support week numbers by default. One of them is javacsript. The getWeekNumber method calculates the week numbers.
Date.prototype.getWeekNumber = function() {
var date = this;
date = new Date(Date.UTC(date.getFullYear(), date.getMonth(), date.getDate()));
var IsoDayOfWeek = date.getDay() == 0 ? 7 : date.getDay(); // Sunday = 7
date.setDate(date.getDate() + 4 - IsoDayOfWeek); // Change to nearest thursday
var DayOfYear = (date.getTime() - Date.UTC(date.getFullYear(), 0, 1)) / 864e5;
var week = Math.floor(DayOfYear / 7) + 1;
return week;
};
//getWeekNumber example
var date = new Date();
jQuery("#UgeTest").html("The number of this week: " + date.getWeekNumber());
The result:
.getDayName()
The name of the Weekday is very useful when working with weeks. My getDayName method returns just this and also supports various languages.
Date.prototype.getDayName = function(language) {
var days = [], supportetLanguages = ["da-DK", "en-US"];
/*
Danish is the standard
Note that this line uses a containsmetode from the Array object,
which are not in the native code of javascript.
See my post about extending the array object for more information.
*/
language = language && supportetLanguages.contains(language) ? language : "da-DK";
//danish
days["da-DK"] = [];
days["da-DK"][0] = "Søndag";
days["da-DK"][1] = "Mandag";
days["da-DK"][2] = "Tirsdag";
days["da-DK"][3] = "Onsdag";
days["da-DK"][4] = "Torsdag";
days["da-DK"][5] = "Fredag";
days["da-DK"][6] = "Lørdag";
//English
days["en-US"] = [];
days["en-US"][0] = "Sunday";
days["en-US"][1] = "Monday";
days["en-US"][2] = "Tuesday";
days["en-US"][3] = "Wedensday";
days["en-US"][4] = "Thursday";
days["en-US"][5] = "Friday";
days["en-US"][6] = "Saturday";
return days[language][this.getDay()];
};
//getDayName example
var date = new Date();
jQuery("#UgedagTest").html(date.getDayName("en-US"));
The result:
.getMonthName()
As well as weekday names can be super handy, so can the month names.
Date.prototype.getMonthName = function(language) {
var months = [], supportetLanguages = ["da-DK", "en-US"];
/*
Danish is the standard
Note that this line uses a containsmetode from the Array object,
which are not in the native code of javascript.
See my post about extending the array object for more information.
*/
language = language && supportetLanguages.contains(language) ? language : "da-DK";
//Dansk
months["da-DK"] = [];
months["da-DK"][0] = "Januar";
months["da-DK"][1] = "Februar";
months["da-DK"][2] = "Marts";
months["da-DK"][3] = "April";
months["da-DK"][4] = "Maj";
months["da-DK"][5] = "Juni";
months["da-DK"][6] = "Juli";
months["da-DK"][7] = "August";
months["da-DK"][8] = "September";
months["da-DK"][9] = "Oktober";
months["da-DK"][10] = "November";
months["da-DK"][11] = "December";
//Engelsk
months["en-US"] = [];
months["en-US"][0] = "January";
months["en-US"][1] = "February";
months["en-US"][2] = "March";
months["en-US"][3] = "April";
months["en-US"][4] = "May";
months["en-US"][5] = "June";
months["en-US"][6] = "Juli";
months["en-US"][7] = "August";
months["en-US"][8] = "September";
months["en-US"][9] = "Oktober";
months["en-US"][10] = "November";
months["en-US"][11] = "December";
return months[language][this.getMonth()];
};
//getMonthName example
var date = new Date();
jQuery("#MaanedNavnTest").html(date.getMonthName("en-US"));
The result:
.format()
The javascript Date object misses a true format method. I have been looking for an extension, which can format a date in all possible formats. I found what I was looking at Steven Levithans blog , where you can download the code.Steven Levithans extension to the Date object is pretty wild. One can use all of the usual date formatting codes. Just look at the examples below.
var now = new Date();
var testTxt = "";
testTxt += '<br /><br />now.format("m/dd/yy"):<br />' + now.format("m/dd/yy");
//Can also be used as an independent method
testTxt += '<br /><br />dateFormat(now, "dddd, mmmm dS, yyyy, h:MM:ss TT")<br />' + dateFormat(now, "dddd, mmmm dS, yyyy, h:MM:ss TT");
// You can use one of several named stitches
testTxt += '<br /><br />now.format("isoDateTime")<br />' + now.format("isoDateTime");
// ...or add your own
dateFormat.masks.hammerTime = 'HH:MM! "Can\'t touch this!"';
testTxt += '<br /><br />now.format("hammerTime")<br />' + now.format("hammerTime");
//When using the independent dateFormat method
//You can send a date as a string
smarttestTxt += '<br /><br />dateFormat("Jun 9 2007", "fullDate")<br />' + dateFormat("Jun 9 2007", "fullDate");
// Note that if you do not include a mask, as parameter
// dateFormat.masks.default will be used
testTxt += '<br /><br />now.format()<br />' + now.format();
// And if you do not include a date as parameter
// today will be used
testTxt += '<br /><br />dateFormat()<br />' + dateFormat();
// You can also skip the date object (as long as your mesh is not
// containing integers). In this case today will be used as well.
testTxt += '<br /><br />dateFormat("longTime")<br />' + dateFormat("longTime");
// You can convert a local time to UTC time. To do this
// you pass along true as a parameter (here it is not permissible to skip over parameters):
dateFormat(now, "longTime", true);
testTxt += '<br /><br />now.format("longTime", true)<br />' + now.format("longTime", true);
// ...Or you can prefix UTC to your mask
testTxt += '<br /><br />now.format("UTC:h:MM:ss TT Z")<br />' + now.format("UTC:h:MM:ss TT Z");
jQuery("#StevenLevithan").html(testTxt);
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