Index ( text ; wordnumber ; characternumber ; result )

Create an index of given text value

Average rating: 4.3 (29 votes) Log in to vote

Michael Bijnens
freelance developer
/

Sample input:

Index ( "Apple Orange Banana ; "" ; "" ; "" )

Sample output:

A
Ap
App
Appl
Apple
O
Or
Ora
Oran
Orang
Orange
B
Ba
Ban
Bana
Banan
Banana
Apple Orange Banana
*

Function definition: (Copy & paste into FileMaker's Edit Custom Function window)

/* ============================================
#
# Purpose:			create an index of given text value
#
# Arthor:			Michael Bijnens
# Creation date:		01/10/2014
#
# Note:				recursive function
#
=============================================*/


Let ( 
	[
		c_chars		=	Length ( text ) ;
		c_words		=	WordCount ( text ) ;
		wordnumber 	=	Case (
						IsEmpty ( wordnumber ) or wordnumber < 1 ;
						1 ;
						wordnumber
						)
	] ;

	Case (

		ValueCount ( result ) + ( c_words - 1 ) = c_chars ;
		result & text & "¶*" ;
		Length ( MiddleWords ( text ; wordnumber ; 1 ) ) = characternumber ;
		Index ( text ; wordnumber + 1 ; 1 ; result & Left ( MiddleWords ( text ; wordnumber + 1 ; 1 ) ; 1 ) & "¶" ) ;
		Index ( text ; wordnumber ; characternumber + 1 ; result & Left ( MiddleWords ( text ; wordnumber ; 1 ) ; characternumber + 1  ) & "¶" )
	
	)
)

This cf creates an index of the given text value.
I use this cf in a calculated field ( unrelated ) to create an index of the calculated text value. It can be used for a search in a portal field. ( portal has to be filtered with a PatternCount function ).

PatternCount ( "field with index" ; "global search field" ) > 0
and
( if u want to show all records )
IsEmpty ( "global search field" )

Comments

		Lee Smith Oct 18, 2014
There is a typo in your CF, the Parameter uses character number as a Parameter and the calculation uses characternumber.

		unix, Japan Oct 19, 2014
I think this is not useful in the case, since PatternCount doesn't use index.

		Michael, Belgium Oct 20, 2014
@ Unix PatterCount doesn't use the Filemaker field index, thats true, but this cf create a similar index in a valuelist so PatternCount can only be useful ;-)

		unix, Japan Oct 21, 2014
Ok, I guess your usage may be not PatternCount, FilterValues ( "field with index" ; "global search field" ) <> "" for matching every head of words against search field.

		Alex Jul 3, 2018
Hello Michael, I love your function. I was wondering, is there any way to remove the full text and the "*" character at the end, and keep only the index? All the best, Alex

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

Index ( text ; wordnumber ; characternumber ; result )

Comments

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