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 FileMaker Pro Custom Functions

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WeekdaysOffset ( startDate ; offset )

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  Average rating: 4.0  (30 votes)
  Discuss this Custom Function

Kurt Otto, ottopiaDESIGN
http://ottopia.dyndns.org/

Returns the specified date plus or minus the specified number of weekdays (Monday to Friday).

Sample Input:
WeekdaysOffset ( "10/4/2005" ; 5 )

WeekdaysOffset ( "10/4/2005" ; -5 )
Sample Output:
11/10/2005

27/9/2005


 Then copy & paste into FileMaker Advanced's Edit Custom Function window.

Click here to copy To Clip Manager if you have myFMbutler's Clip Manager installed

Description:

Format
------
WeekdaysOffset ( startDate ; offset )

Parameters
----------
startDate - any date expression or field containing a date.
offset - any numeric expression or field containing a number, representing which number of weekdays you want to add or subtract from startDate.

Data type returned
----------------
date

Description
----------
Returns the specified date plus or minus the specified number of weekdays (Monday to Friday).

Examples
--------
This example assumes that the system date format is DD/MM/YYYY.

WeekdaysOffset ( "10/4/2005" ; 5 ) returns 11/10/2005
WeekdaysOffset ( "10/4/2005" ; -5 ) returns 27/9/2005

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

This is my Custom Function and I want to edit it

Discuss:

Great function. I would like to count the current day and am having some trouble figuring how to include it.

If it is Monday, and the offset is 5, I would like the date to show the following Friday rather than the following Monday.

Any suggestions on how the modification would look?

Andrew Grant, Roseburg, OR
August 23, 2010 11:31am

Have you considered just subtracting a day from your offset? :-)

Otherwise if you are always counting the current day in your offset, just add or subtract a 1 where appropriate:

If (

// Offset is a negative value
offset < 0 ; startDate + Int ( (offset + 1) / 5 ) * 7 - Middle( "23456034560145601256012360123412345" ; ( DayOfWeek ( startDate ) - 1 ) * 5 + Mod ( Abs ( (offset + 1) ) ; 5 ) + 1 ; 1 ) ;

// Offset is a positive value
startDate + Int ( (offset - 1) / 5 ) * 7 + Middle ( "12345012340123601256014560345623456" ; ( DayOfWeek ( startDate ) - 1 ) * 5 + Mod ( (offset - 1) ; 5 ) + 1 ; 1 )

)

Kurt Otto, Rosebank
August 23, 2010 4:30pm

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