공대생의 비망록

1234567891011121314151617181920212223242526272829303132333435struct Queue { private var list = [T]() var isEmpty: Bool { return self.list.isEmpty } var front: T? { return self.list.first } mutating func enqueue(_ item: T) { self.list.append(item) } mutating func dequeue() -> T? { guard self.isEmpty == false else { return nil } return self.list.removeFirst() } }Colored by Color Scriptercs