[FX.php List] [OFF] Javascript question--comparing dates

[Ness, David]

Bob,

This is what I use to compare dates. Hope this helps:

------------------------------------------
function compareDates(value1, value2) {
/*	A simple function that takes two well formed dates.
	The function will compare the dates and return:

		 0 if the dates are same
		-1 if the first one is an earlier date
		 1 if the first one is a later date
*/
   var date1, date2;
   var month1, month2;
   var year1, year2;

   month1 = value1.substring (0, value1.indexOf (dtCh));
   date1 = value1.substring (value1.indexOf (dtCh)+1, value1.lastIndexOf (dtCh));
   year1 = value1.substring (value1.lastIndexOf (dtCh)+1, value1.length);

   month2 = value2.substring (0, value2.indexOf (dtCh));
   date2 = value2.substring (value2.indexOf (dtCh)+1, value2.lastIndexOf (dtCh));
   year2 = value2.substring (value2.lastIndexOf (dtCh)+1, value2.length);
   
   if(month1.length == 1) {month1 = '0' + month1}
   if(date1.length == 1) {date1 = '0' + date1}
   if(month2.length == 1) {month2 = '0' + month2}
   if(date2.length == 1) {date2 = '0' + date2}

   if (year1 > year2) return 1;
   else if (year1 < year2) return -1;
   else if (month1 > month2) return 1;
   else if (month1 < month2) return -1;
   else if (date1 > date2) return 1;
   else if (date1 < date2) return -1;
   else return 0;
} 


// example on calling the function isDate()
function ValidateDate(){
	var dt=document.frmSample.txtDate
	if (isDate(dt.value)==false){
		dt.focus()
		return false
	}
    return true
 }





--------------------------------------------



David Ness
FileMaker & Web Applications Developer

Bonded Builders Warranty Group
St. Petersburg, Florida USA
800-749-0381 x4923


-----Original Message-----
From: fx.php_list-bounces at mail.iviking.org [mailto:fx.php_list-bounces at mail.iviking.org] On Behalf Of Bob Patin
Sent: Wednesday, December 03, 2014 2:18 PM
To: FX.php Discussion List
Subject: [FX.php List] [OFF] Javascript question--comparing dates

OK, list, this should be really easy, but I can’t get the proper results:

I have this code:

var date1 = getToday();
var date2 = new Date("12/01/2014");
var res = compareDates(date1,date2);
alert(res);

Here’s the function:

// compare any 2 dates
	// 0 -- date1 < date2
	// 1 -- dates are equal
	// 2 -- date1 > date2

function compareDates(date1, date2){
	if (+date1 < +date2){
		return 0;
	}else if (+date1 == +date2){
		return 1;
	}else if (+date1 > +date2){
		return 2;
	}else{
		return "UNSOLVED";
	}
} 

If you try this, you’ll get UNSOLVED rather than the right answer, which should be 2, because date1 > date2 in my example.

This is so easy to do in PHP, but for some reason, despite lots of Googling, I haven’t gotten anything that works.

Thanks for any enlightenment,

Bob Patin
Longterm Solutions
bob at longtermsolutions.com
615-333-6858
FileMaker 9, 10, 11, 12 & 13 Certified Developer http://www.longtermsolutions.com
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iChat: bobpatin at me.com
Twitter: bobpatin
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FileMaker Hosting for all versions of FileMaker PHP • Full email services • Free DNS hosting • Colocation • Consulting

 
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