Why doesn't a class derived from TArray work with delegates?

[Ivan3z]

I have derived a class from TArray to add some functionality.

But my derived class doesn’t work with delegates.

TArray is not a UCLASS and it works.

I don’t understand it. Why does this happen?
Thank you so much

[UnrealEverything]

A lot of code in the engine exists that specifically handles TArray’s to make them supported even if they aren’t marked UCLASS/USTRUCT. UnrealHeaderTool complains since your FScoreCardDataArray isn’t marked as UCLASS/USTRUCT. Even if you do, UHT may then complain that TArray isn’t allowed as a base.

Depends on your use case but I’d probably drop the class entirely and use TArray directly. You can write a free static function in a BlueprintFunctionLibrary that internally uses TArray::IndexOfByPredicate instead to find an element by PlayerID.

[Ivan3z]

Ok, I will do it as you say since there is no other alternative.
Thank you very much for your help