diff --git a/Linked List/LinkedList.playground/Contents.swift b/Linked List/LinkedList.playground/Contents.swift index 76b911310..70e8319ac 100644 --- a/Linked List/LinkedList.playground/Contents.swift +++ b/Linked List/LinkedList.playground/Contents.swift @@ -81,12 +81,9 @@ public final class LinkedList { var node = head!.next for _ in 1.. { /// /// - Parameter list: The list to be copied and appended. public func append(_ list: LinkedList) { - var nodeToCopy = list.head - while let node = nodeToCopy { - append(node.value) - nodeToCopy = node.next + + guard let headNode = list.head else { + return } + + append(headNode) } /// Insert a value at a specific index. Crashes if index is out of bounds (0...self.count) @@ -380,6 +378,7 @@ list2.append("World") list.append(list2) // [Hello, World, Goodbye, World] list2.removeAll() // [ ] list2.isEmpty // true + list.removeLast() // "World" list.remove(at: 2) // "Goodbye" @@ -387,6 +386,7 @@ list.insert("Swift", at: 1) list[0] // "Hello" list[1] // "Swift" list[2] // "World" +//list[10] // crash!! print(list) list.reverse() // [World, Swift, Hello]