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API > API/Runtime > API/Runtime/SlateCore > API/Runtime/SlateCore/TObservableArrayChangedArgs
Description
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.
| Name | GetActionIndex |
| Type | function |
| Header File | /Engine/Source/Runtime/SlateCore/Public/Containers/ObservableArray.h |
| Include Path | #include "Containers/ObservableArray.h" |
SizeType GetActionIndex() const
The index the action started.