Lesson 9. The meaning of constructor definition

[nowissan]

I am not sure what it means when writing constructor like this. A normal constructor is simple, but here it looks like there are "extras" after the arguments. VRFConsumerBaseV2 ...

as this contract inherits from VRFConsumerBaseV2, I don't get why we have to specify the parent contract here again...??

constructor(address vrfCoordinator, uint256 entranceFee) VRFConsumerBaseV2(vrfCoordinator) {
       i_entranceFee = entranceFee;
}

How do I understand what this is doing?

[rin-st]

Since the contract can be inherited from multiple other contracts it's not clear how parent constructors should be executed. So here you're using parent constructors and parameters you need