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API > API/Runtime > API/Runtime/SlateCore > API/Runtime/SlateCore/Containers > API/Runtime/SlateCore/Containers/TObservableArrayChangedArgs
References
| Module | SlateCore |
| Header | /Engine/Source/Runtime/SlateCore/Public/Containers/ObservableArray.h |
| Include | #include "Containers/ObservableArray.h" |
SizeType GetActionIndex&40;&41; const
Remarks
Valid for the Add, Remove, RemoveSwap action. Use GetItems.Num() to know how many elements were added/removed. Add: The array index where we added the elements. Remove: The old array index before it removed the elements. The index is not valid anymore. RemoveSwap: The old array index before it removed the elements. The index is valid if the array is not empty. The index the action started.