Swift Functional Programming - Second Edition

viewModel

We will have two viewModel, one for each ViewController:

import ReactiveCocoa struct TodosViewModel {     let todos: [Todo]     func todoForIndexPath(_ indexPath: IndexPath) -> Todo {         return todos[indexPath.row]     } } 

We will use TodosViewModel to list Todo items in our table view:

struct TodoViewModel {     let todo: Todo? } 

We will use TodoViewModel to present each Todo item's details.