공대생의 비망록

12345678910111213141516171819202122232425262728293031323334353637struct Stack { private var list = [T]() var isEmpty: Bool { return self.list.isEmpty } var top: T? { return self.list.last } mutating func push(_ item: T) { self.list.append(item) } mutating func pop() -> T? { return self.list.popLast() } mutating func peek() -> T? { return self.list.last } } Colored by Color Scriptercs