Returning ref to USTRUCT from Array

Development Programming & Scripting C++
1

Hello,

I’m attempting to return a reference from an element in a TArray (an Array of USTRUCT). The intent is to then use that returned reference to modify the array value.



TArray<FCharacterAttribute> Attributes;

bool UAttributeComponent::GetCharacterAttribute(FGameplayTag tag, FCharacterAttribute& attribute)
{
  for (auto& value : Attributes)
  {
    if (value.ParameterTag == tag)
    {
      attribute = value;
      return true;
    }
   }
  return false;
}

I assume this is the way to do it - but it seems to come back as a value (ie modifications dont persist in the array). Any ideas how to do this?

2

At the moment you’re just copying the value of the array out into some other variable. You probably want to simply return a pointer instead. The easiest was to do this would be to use Attributes.FindByKey(), and provide an operator overload for the Gameplay Tag.



struct FMyTpye
{
bool operator==(const FGameplayTag& Tag) const { return ParameterTag == Tag; }
}

FMyType* Parameter = MyArray.FindByKey(Tag);
if (Parameter)
{
    // do stuff.
}
3

Thanks so much for the clarity!