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

[Bob Patin]

Hi,

I did see it, and I tried that as well; I tried changing the dates to milliseconds, thinking that would allow me to do comparisons, since I read somewhere that you can’t use == to compare 2 dates.

Just now, thinking I’d waste yet more time on it, I tried this:

var date1 = new Date();
var date2 = new Date("12/04/2014");
var res = compareDates(date1,date2);
alert(res);

and the compareDates function is this:

function compareDates(date1, date2){
	
	date1 = date1.getMilliseconds();
	date2 = date2.getMilliseconds();
	alert (date1 + “---" + date2);

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

When I run it, the alert gives me a value for date1 but not for date2.

Why am I not getting a value from date2? Can I not use the format that I’m using in the call to the function?

Bob Patin
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> On Dec 4, 2014, at 9:18 AM, Fitzgerald, Theodore C <ted-fitzgerald at uiowa.edu> wrote:
> 
> Not sure if you missed my post, so here it is again:
>  
> In order to do the greater than and less than comparison you'll need to be working with Date objects, so if getToday() doesn't return a date object, your function won't work correctly.
>  
> I'm not sure what "getToday();" is doing, but to get today's date,  you only need to do "new Date()";.  Here is an example of it working:
>  
> http://jsfiddle.net/qpvugLna/1/ <http://jsfiddle.net/qpvugLna/1/> (warning, it does show the alert when you visit the page)
>  

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