package engine

type Stack []IsCard

func (s Stack) Contains(predicate func(c IsCard) bool) bool {
	for _, c := range s {
		if predicate(c) {
			return true
		}
	}
	return false
}

func (s Stack) Filter(predicate func(c IsCard) bool) Stack {
	res := make(Stack, 0, len(s))
	for _, c := range s {
		if predicate(c) {
			res = append(res, c)
		}
	}
	return res
}

func (s Stack) Pop() IsCard {
	if len(s) < 1 {
		return nil
	} else {
		c := s[0]
		s = s[1:]
		return c
	}
}

func (s Stack) Hidden() Stack {
	return Secrets(len(s))
}