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FileMaker Pro Custom Functions

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QuarterRoundTS ( mytimestamp )

Jeff Morrison, Conceptualize Solutions
http://www.conceptualize.com

Rounds a timestamp to the nearest quarter hour.

Sample Input:

QuarterRoundTS (4/14/2008 11:58:00 PM )

Sample Output:

4/15/2008 12:00:00 AM

If( GetAsTime( Round( GetAsTime( Time ( Hour ( mytimestamp ) ; Minute ( mytimestamp ) ; Seconds ( mytimestamp ) ) ) / 900 ; 0 ) * 900 ) = "24:00:00"; Date ( Month ( mytimestamp ) ; Day ( mytimestamp ) ; Year ( mytimestamp ) ) + 1 & " " & "12:00:00 AM"; Date ( Month ( mytimestamp ) ; Day ( mytimestamp ) ; Year ( mytimestamp ) ) & " " & Case( Hour(GetAsTime( Round( GetAsTime( Time ( Hour ( mytimestamp ) ; Minute ( mytimestamp ) ; Seconds ( mytimestamp ) ) ) / 900 ; 0 ) * 900 ))=0; 12; Hour(GetAsTime( Round( GetAsTime( Time ( Hour ( mytimestamp ) ; Minute ( mytimestamp ) ; Seconds ( mytimestamp ) ) ) / 900 ; 0 ) * 900 )) > 12; Hour(GetAsTime( Round( GetAsTime( Time ( Hour ( mytimestamp ) ; Minute ( mytimestamp ) ; Seconds ( mytimestamp ) ) ) / 900 ; 0 ) * 900 )) - 12; Hour(GetAsTime( Round( GetAsTime( Time ( Hour ( mytimestamp ) ; Minute ( mytimestamp ) ; Seconds ( mytimestamp ) ) ) / 900 ; 0 ) * 900 ))) & ":" & Right("00" & Minute(GetAsTime( Round( GetAsTime( Time ( Hour ( mytimestamp ) ; Minute ( mytimestamp ) ; Seconds ( mytimestamp ) ) ) / 900 ; 0 ) * 900 )); 2) & ":00" & If(Hour(GetAsTime( Round( GetAsTime( Time ( Hour ( mytimestamp ) ; Minute ( mytimestamp ) ; Seconds ( mytimestamp ) ) ) / 900 ; 0 ) * 900 )) >= 12; " PM"; " AM") )
Then copy & paste into FileMaker Advanced's Edit Custom Function window.

if you have myFMbutler's Clip Manager installed

Description:

I needed a way to hand the function a timestamp and get back one rounded to the nearest quarter hour. There were plenty of good functions for rounding to the quarter hour, but none that would take in a timestamp and hand back a timestamp. It also needed to take into account when the day changes due to the rounding of the time.

Example:
Insert Calculated Result [ after_field ; QuarterHourTS ( before_field )]

In this example, the "before_field" and the "after_field" should be timestamp fields.

Note: these functions are not guaranteed or supported by BrianDunning.com. Please contact the individual developer with any questions or problems.

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