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FileMaker Pro Custom Functions

Acos ( number )

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Brian Dunning, BrianDunning.com
http://www.briandunning.com/

Returns the arc cosine of a given number.

Sample Input:
 Acos ( .4 )
Sample Output:
 1.15928

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

Description:

Returns the arc cosine, or inverse cosine, of a given number. This operates in radians, just like FileMaker's other trigonometric functions. For the input to be a valid cosine, it should be in the range of -1 to 1.

Additional thanks to Corn Walker and Jason DeLooze.

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:

/*-------------------------------------------------------
Function Name: IsValidBankNumber
Checks a Dutch banknumber for validity.
Syntax: IsValidBankNumber ( banknummer )
Returns "true" if banknummer passes the '11-proef',
"false" if not or an empty string if banknummer is empty.
Author - Theo Ros
----------------------------------------------------------*/

If ( IsEmpty ( banknummer ) ; "" ;
Let ( sNumber = Filter ( banknummer ; "0123456789" ) ;
If ( sNumber = "123456789" or Length ( sNumber ) > 9 ; "false" ;
Let ( nNumber = Right( "000000000" & sNumber ; 9 ) ;
If ( Mod( GetAsNumber ( Left ( nNumber ; 1 ) ) * 9 +
GetAsNumber ( Middle ( nNumber ; 2 ; 1 ) ) * 8 +
GetAsNumber ( Middle ( nNumber ; 3 ; 1 ) ) * 7 +
GetAsNumber ( Middle ( nNumber ; 4 ; 1 ) ) * 6 +
GetAsNumber ( Middle ( nNumber ; 5 ; 1 ) ) * 5 +
GetAsNumber ( Middle ( nNumber ; 6 ; 1 ) ) * 4 +
GetAsNumber ( Middle ( nNumber ; 7 ; 1 ) ) * 3 +
GetAsNumber ( Middle ( nNumber ; 8 ; 1 ) ) * 2 +
GetAsNumber ( Right ( nNumber ; 1 ) ) ; 11 ) = 0 ; "true" ; "false"
)
)
)
)
)

Klaus, Berlin
September 08, 2011 10:59am