workflowy

package collections type Stack[T any] struct { Items []T } func (s Stack[T]) IsEmpty() bool { return len(s.Items) == 0 } func (s *Stack[T]) Push(item T) { s.Items = append(s.Items, item) } func (s *Stack[T]) Pop() *T { top := &s.Items[len(s.Items)-1] s.Items = s.Items[:len(s.Items)-1] return top } func (s *Stack[T]) Top() *T { return &s.Items[len(s.Items)-1] }