Method Push

data-structures/stack/stack.go:42–50

(el interface{})

}

func (s *Stack) Push(el interface{}) {
	s.lock.Lock()
	defer s.lock.Unlock()

	prepend := make([]interface{}, 1)
	prepend[0] = el
	s.stack = append(prepend, s.stack...)
	s.len++
}

func (s *Stack) Peek() interface{} {
	s.lock.Lock()