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ValuesIntersection ( ValuesListA ; ValuesListB ; passNullStringHere )

Returns the Values that are in BOTH ValuesListA and ValuesListB.

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Hal Gumbert - Show more from this author CampSoftware http://www.campsoftware.com

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

// ValuesIntersection ( ValuesListA; ValuesListB; passNullStringHere ) // // Hal Gumbert, http://campsoftware.com // // Returns the Values that are in BOTH ValuesListA and ValuesListB. // // Parameters: // ValuesListA = List of Return delimited data. // ValuesListB = List of Return delimited data. // passNullStringHere = Pass in "" as it's used to store the list of Values in both ValueLists. // // Return Value: // The Values that are in BOTH ValuesListA and ValuesListB // // Input: ValuesIntersection ( "1¶2¶3¶4¶5" ; "4¶2¶3" ; "" ) // Output: 2¶3¶4 // Let ( [ firstValue = LeftValues ( ValuesListA ; 1 ) ; remainingValues = RightValues ( ValuesListA ; ValueCount ( ValuesListA ) - 1 ) ; firstValue = Substitute ( firstValue & "¶" ; "¶¶" ; "" ) ; remainingValues = Substitute ( remainingValues & "¶" ; "¶¶" ; "" ) ; valueToAdd = If ( PatternCount ( "¶" & ValuesListB & "¶" ; "¶" & firstValue & "¶" ) > 0 ; firstValue ; "" ) ; matchingValues = passNullStringHere & Case ( IsEmpty ( passNullStringHere ) and not IsEmpty ( valueToAdd ) ; valueToAdd ; not IsEmpty ( passNullStringHere ) and not IsEmpty ( valueToAdd ) ; "¶" & valueToAdd ; "" ) ] ; If ( ValueCount ( ValuesListA ) ≤ 1 ; passNullStringHere ; ValuesIntersection( remainingValues ; ValuesListB ; matchingValues ) ) ) Click to copy

ValuesIntersection ( ValuesListA; ValuesListB; passNullStringHere )

Hal Gumbert, http://campsoftware.com

Returns the Values that are in BOTH ValuesListA and ValuesListB.

Parameters:
ValuesListA = List of Return delimited data.
ValuesListB = List of Return delimited data.
passNullStringHere = Pass in "" as it's used to store the list of Values in both ValueLists.

Return Value:
The Values that are in BOTH ValuesListA and ValuesListB

Input: ValuesIntersection ( "1¶2¶3¶4¶5" ; "4¶2¶3" ; "" )
Output: 2¶3¶4

 

Comments

		eos, Teg May 11, 2015
Is that different from what FilterValues() does?

		Hal Gumbert, Orlando, FL May 11, 2015
It seems to have the same result!

		eos, Teg May 11, 2015
Indeed … :-) And just for kicks: // ValuesIntersection ( listToCheck; checkList ) Let ( [ $i = $i + 1 ; currentValue = GetValue ( listToCheck ; 1 ) ; remainingToCheck = MiddleValues ( listToCheck ; 2 ; ValueCount ( listToCheck ) - 1 ) ; remainingToCheck = Left ( remainingToCheck ; Length ( remainingToCheck ) - 1) ; isMatch = PatternCount ( ¶ & checkList & ¶ ; ¶ & currentValue & ¶ ) ; // where you would use FilterValues() – if it existed … ;-) $matchCount = $matchCount + isMatch ; matchValue = Case ( isMatch; Case ( $matchCount > 1 ; ¶ ) & currentValue ) ] ; matchValue & Case ( ValueCount ( remainingToCheck ) ; ValuesIntersection ( remainingToCheck ; checkList ) ; Let ( [ $i = "" ; $matchCount = "" ] ; "" ) ) )

		Hal Gumbert, Orlando, FL May 13, 2015
Nice... I like how you removed my unneeded parameter.

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