Comments on: Date math for lazy people

By: Peter deHaan

Peter deHaan — Mon, 01 Feb 2010 04:52:34 +0000

@Maria,

Sorry, I’ve never used LiveCycle… You can try asking them how to structure the code/project in the Adobe LiveCycle blog at http://blogs.adobe.com/livecycle/.

Peter

By: Maria

Maria — Mon, 01 Feb 2010 01:56:08 +0000

Hi Peter i am starting with adobe live cycle i dont know how to included this code in there and how to call the variables, can you give me a hand. Thanks.

By: Peter deHaan

Peter deHaan — Mon, 01 Feb 2010 00:11:04 +0000

@Maria,

Try this… You can use the time property of each Date object to convert the date to milliseconds, then subtract the dates and divide by the number of milliseconds in a single day (1000 X 60 X 60 X 24):

"1.0"?>
 xmlns:mx="http://www.adobe.com/2006/mxml" creationComplete="init();">
 
    
        
            public const date1:Date = new Date(2010, 6, 4); /* Jul 4, 2010 */
            public const date2:Date = new Date(2010, 11, 31); /* Dec 31, 2010 */
 
            public const MS_IN_DAYS:Number = 1000 /* ms in sec */ * 60 /*secs in mins */ * 60 /* mins in hr */ * 24 /* hours in day */; 
 
            public function init():void {
                var diffInMS:Number = date2.time - date1.time;
                result.text = (diffInMS / MS_IN_DAYS).toFixed(1);
            }
        ]]>
    
 
     text="Days between {date1.toDateString()} and {date2.toDateString()}:" />
     id="result" />
 
>

Peter

By: Maria

Maria — Sun, 31 Jan 2010 23:11:00 +0000

can someone please help me . i need to know how to calculate the number of days between two different dates?
Cheers,
Maria

By: Marshall

Marshall — Mon, 25 Jan 2010 23:26:36 +0000

Yet again this blog saves my ass. Thanks a lot for your efforts here!

By: Gareth Arch

Gareth Arch — Wed, 21 Oct 2009 18:25:05 +0000

I’ve written a pretty full featured FlexDateUtils library that handles dateAdd (plus a slew of other date functions) with constants to help reference the various dateparts. It’s posted in the google code base at http://code.google.com/p/flexdateutils/ or Ray Camden’s riaforge, flexdateutils.riaforge.org Hopefully it’ll be useful to some of the posters here.

By: Tim Oxley

Tim Oxley — Tue, 22 Sep 2009 02:21:01 +0000

Have you seen the adobe version of this in the fr.runtime.DateTimeFunc class?

http://livedocs.adobe.com/flex/gumbo/langref/index.html?fr/runtime/lib/DateTimeFunc.html

I’m not sure where to get this from, it doesn’t appear to be in the flex4 svn source or anywhere else reasonable… apparently, based on the package name, it has something to do with ‘fiber’ which I think is something to do with live cycle 3… anyway, if someone knows anything more about this and could direct us to a download of this package, that’d be rad.

Regards,

Tim

By: Peter deHaan

Peter deHaan — Thu, 03 Sep 2009 00:16:32 +0000

@Didi,

I believe a few comments above deal with getting week numbers, but you could try something like this (relatively untested) code:

 xmlns:mx="http://www.adobe.com/2006/mxml">
 
    
        
            private const MILLISECONDS_IN_WEEK:uint = 1000 /* milliseconds */ * 
                                                        60 /* seconds */ * 
                                                        60 /* minutes */ * 
                                                        24 /* hours */ * 
                                                         7 /* days */;
 
            private function calculateWeekNumber(dat:Date):int {
                var jan1:Date = new Date(dat.fullYear, 0, 1);
                var diff:Number = dat.time - jan1.time;
                var diffInWeeks:uint = diff / MILLISECONDS_IN_WEEK;
                return diffInWeeks;
            }
        ]]>
    
 
     id="datField" />
 
     id="lbl" text="Week: {calculateWeekNumber(datField.selectedDate)}" />
 
>

Peter

By: Didi

Didi — Wed, 02 Sep 2009 20:44:03 +0000

hi Peter,

I am trying to get the week no of a date.

For example,

Date: 3rd September 2009
Week: 36

Date: 7 September 2009
Week: 37
.
.
.
Date: 29 December 2009
Week: 53

do u have an idea where i can get the week no from a date?

Thanks in advance for your help

By: nate alberg

nate alberg — Wed, 12 Aug 2009 01:12:56 +0000

Oh.. you may want this too.

    
    public static const MS_IN_SEC:int = 1000;
    public static const MS_IN_MIN:int = 1000 * 60;
    public static const MS_IN_HOUR:int = 1000 * 60 * 60;
    public static const MS_IN_DAY:int = 1000 * 60 * 60 * 24;
    public static const MS_IN_YEAR:Number = 1000 * 60 * 60 * 24 * 365;