Comments on: Date math for lazy people

By: Konstantin Shilov

Konstantin Shilov — Thu, 04 Dec 2008 11:34:06 +0000

To add a week support, you can modify your script, and add this lines:

switch(datepart.toLocaleLowerCase()) 
{
    ...

    case "week":
        datepart = "date";
        number = number * 7;
        break;

    ...
}

By: peterd

peterd — Tue, 07 Oct 2008 19:21:08 +0000

Vesta,
That’s OK, gush away.

Peter

By: Vesta

Vesta — Tue, 07 Oct 2008 19:07:02 +0000

I hate to gush, but this is terrific. Now a part of my utilities from now until forever!

By: i0n

i0n — Tue, 13 May 2008 18:55:35 +0000

A optimize version of the code. Note: I do not use a ColdFusion Server. Modify it has your require for that.

public static function dateAdd(datepart:String = "", number:Number = 0, date:Date = null):Date {
		    date = date == null ? new Date() : new Date(date.time);
		
		    switch(datepart.toLocaleLowerCase()) {

		    	case "y":
		    	case "fullyear":
		        case "yyyy":
		        case "year":
		            datepart = "fullYear";
		            break;
		            
		        case "m":
		        case "month":
		            datepart = "month";
		            break;
		        
		        case "d":
		        case "day":
		        case "date":
		            datepart = "date";
		            break;
		            
		        case "h":
		        case "hours":
		            datepart = "hours";
		            break;
	            
	            case "minutes":
		        case "n":
		            datepart = "minutes";
		            break;
		            
	            case "seconds":
		        case "s":
		            datepart = "seconds";
		            break;
		            
		        case "milliseconds":
		        case "l":
		            datepart = "milliseconds";
		            break;
	            default:
		            datepart = null;
		    }
		
		    if(datepart != null)
		    	date[datepart]  += number;
		    return date;
		}

By: kpli

kpli — Fri, 28 Dec 2007 04:30:02 +0000

Thanks for the info bro…i was searching for this for a long time…u’re certainly pro at this…

By: Prath

Prath — Wed, 12 Dec 2007 12:48:26 +0000

Thanks dude. you made my day.

By: Ross MacLachlan

Ross MacLachlan — Mon, 10 Dec 2007 16:17:00 +0000

“fullyear” does not work. It’s actualy “fullYear” with the capital Y.
To fix this remove the “.toLowerCase()” and pass in correct case. change the
line-> case “fullyear”:
to-> case “fullYear”:

Thanks for the example. I find this site more helpful than the Adobe site for finding the exact tweek you need.

Keep up the great work.

By: peterd

peterd — Fri, 24 Aug 2007 19:55:48 +0000

I think this should work for the various date aliases, bringing my dateAdd() function a bit closer in line with ColdFusion’s (with the exception of support for “q” (quarter) and “ww” (week)):

private function dateAdd(datepart:String = "", number:Number = 0, date:Date = null):Date {
    if (date == null) {
        /* Default to current date. */
        date = new Date();
    }

    var returnDate:Date = new Date(date.time);

    switch(datepart.toLocaleLowerCase()) {
        case "yyyy":
        case "year":
            datepart = "fullYear";
            break;
        case "m":
            datepart = "month";
            break;
        case "y":
        case "d":
        case "w":
        case "day":
            datepart = "date";
            break;
        case "h":
            datepart = "hours";
            break;
        case "n":
            datepart = "minutes";
            break;
        case "s":
            datepart = "seconds";
            break;
        case "l":
            datepart = "milliseconds";
            break;
    }

    switch (datepart.toLowerCase()) {
        case "fullyear":
        case "month":
        case "date":
        case "hours":
        case "minutes":
        case "seconds":
        case "milliseconds":
            returnDate[datepart]  = number;
            break;
        default:
            /* Unknown date part, do nothing. */
            break;
    }
    return returnDate;
}