Cannot invoke 'indexOf' with an argument list of type '(ChecklistItem)'

Question

When I am writing code for finding an item from the array with the use of indexOf it shows me the above stated error. Here is my code:-

func addItemViewContr         


        

Answer 1

In order to use indexOf the ChecklistItem must adopt Equatable protocol. Only by adopting this protocol the list can compare an item with other items to find the desired index