Swift Functional Programming - Second Edition

Elements

We can implement a computed property to provide an array of elements as follows:

var elements: [Element] {     switch self {     case .node(let data, let next):         return [data] + next.elements     case .end:         return []     } } 

Here, we recur through LinkedList and return an array of data. We will be able to use this property as follows:

print(functionalLinkedList.elements) 

This statement prints [3, 2, 1].