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我正在尝试使用 Swift 检测链表中的循环/周期的函数。 有人可以告诉我代码如何做到这一点吗？ 我在其他一些我不太熟悉的编程语言中找到的唯一答案
这是我目前正在处理的代码。
public class Node<Value> {
public var value: Value
public var next: Node?
public init(value: Value, next: Node? = nil) {
self.value = value
self.next = next
}
}
public struct LinkedList<Value> {
public var head: Node<Value>?
public var tail: Node<Value>?
public init() {}
public var isEmpty: Bool {
return head == nil
}
public mutating func push(_ value: Value) {
head = Node(value: value, next: head)
if tail == nil {
tail = head
}
}
public mutating func apped(_ value: Value) {
guard !isEmpty else {
push(value)
return
}
tail!.next = Node(value: value)
tail = tail!.next
}
}
extension Node: CustomStringConvertible {
public var description: String {
guard let next = next else {
return "\(value)"
}
return "\(value) -> " + String(describing: next) + " "
}
}
extension LinkedList: CustomStringConvertible {
public var description: String {
guard let head = head else {
return "Empty List"
}
return String(describing: head)
}
}