Components All New MacOS Windows Linux iOS
Examples Mac & Win Server Client Guides Statistic FMM Blog Deprecated Old


Finds duplicate items in the list.

Component Version macOS Windows Linux Server iOS SDK
List 10.5 ✅ Yes ✅ Yes ✅ Yes ✅ Yes ✅ Yes
MBS( "QuickList.FindDuplicateItems"; ListRef { ; ReturnNewList; CaseInsensitive } )   More


Parameter Description Example Flags
ListRef The reference to the list returned from QuickList.New function. $List
ReturnNewList Pass 1 to return result as new QuickList.
This new list must be freed later using QuickList.Release function. Pass 0 (Default) to modify the list in the List1 parameter.
0 Optional
CaseInsensitive Available in MBS FileMaker Plugin 14.0 or newer.
Whether to perform comparison case insensitve.
By default we do case sensitive operations, which are faster.
Pass 1 for insensitve or 0 for sensitive.
0 Optional


Returns list or error.


Finds duplicate items in the list.
Returns list with all duplicate items, but only counts each one once.
Similar to QuickList.RemoveDuplicateItems and see also List.FindDuplicateItems.

See also

Release notes

Blog Entries

This function checks for a license.

Created 28th September 2020, last changed 14th December 2023

QuickList.Find - QuickList.FindEquals