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Flex Date Utils – daysInMonth, dayOfWeekAsString

January 1st, 2009 Gareth Leave a comment Go to comments

These 2 methods are pretty self explanatory, daysInMonth and dayOfWeekAsString

/**
 * Gets the days in the month
 * 
 * @param date	The date to check
 * 
 * @return		The number of days in the month
 */
public static function daysInMonth( date:Date ):Number {
	// get the first day of the next month
	var _localDate:Date = new Date( date.fullYear, DateUtils.dateAdd( DateUtils.MONTH, 1, date ).month, 1 );
	// subtract 1 day to get the last day of the requested month
	return DateUtils.dateAdd( DateUtils.DAY_OF_MONTH, -1, _localDate ).date;
}

This method calculates how many days are in the month for the date passed in to the method. It takes the date parameter and sets a temporary date to the first day of the next month. Then it subtracts 1 day from that date to get the last day of the requested month.

So in order to use this method, first import the package

import com.flexoop.utilities.dateutils.DateUtils;

and then:

private var _total:Number = DateUtils.daysInMonth( new Date( 2009, DateUtils.monthAsNumber( DateUtils.JANUARY ), 1 ) );

This would return 31 to _total.

/**
 * Formats a date to the string version of the day of the week
 * 
 * @param date	The date to format
 * 
 * @return		A formatted day of week
 */
public static function dayOfWeekAsString( date:Date ):String {
	return DateUtils.dateFormat( date, "EEEE" );
}

This method returns a formatted date for the day of week. Nothing crazy here.

So in order to use this method, first import the package

import com.flexoop.utilities.dateutils.DateUtils;

and then:

private var _dow:String = DateUtils.dayOfWeekAsString( new Date( 2009, DateUtils.monthAsNumber( DateUtils.JANUARY ), 1 ) );

And this would return, Thursday

All methods in this series are describing code in the FlexDateUtils package I put on Google code.

Categories: Flex, FlexDateUtils, code, library Tags: , ,
  1. Tink
    January 3rd, 2009 at 05:30 | #1
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    Have you looked at DateFormatter? i.e. the following would do the same.

    var dateFormatter:DateFormatter = new DateFormatter();
    dateFormatter.formatString = “EEEE”;
    trace( dateFormatter.format( new Date( 2009, 1, 1 ) ); // Thursday

  2. Gareth
    January 3rd, 2009 at 11:10 | #2
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    Definitely. And that is actually what I am doing inside my “dateFormat” method. The dayOfWeekAsString is just a direct carryover from ColdFusion’s date library. For some reason they break out that functionality there, so I decided to include it here also. I didn’t really understand their reasoning behind including it, but I thought it wouldn’t hurt to include it in the library for those who didn’t want to mess with the dateFormat method directly. Thanks for reading though, and the suggestion.

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