API/Runtime/Core/Containers/FString/Join

[giscus[bot]]

API/Runtime/Core/Containers/FString/Join

Joins a range of 'something that can be concatentated to strings with +=' together into a single string with separators.

https://docs.unrealengine.com/API/Runtime/Core/Containers/FString/Join/

[soraphis]

Usage Example

        TArray<int> foo{-3, -4, 7, 0, 2, 1, 3, 17, 200, -300};
		TArray<FString> StrArray;
		Algo::Transform(foo, StrArray, [](int a){ return FString::FromInt(a); });
		UE_LOG(LogTemp, Log, TEXT("%s"), *FString::Join(StrArray, TEXT(",")));

Notes

• You can't FString::Join a TArray directly, it will complain that there is no += operator that converts all the arguments.
• You can't use FString::Join as the third argument in a UE_LOG (instead of TEXT("%s")), as UE_LOG expects a const TCHAR*