package redis

// Set represents a set object using a map of empty structs
type Set map[string]void
type void struct{}

var member void

// Add id to the set, returns false if id exists
func (s Set) Add(id string) bool {
	if _, ok := s[id]; ok {
		return false
	}
	s[id] = member
	return true
}

// Remove id from the set, return false if id doesn't exist
func (s Set) Remove(id string) bool {
	if _, ok := s[id]; !ok {
		return false
	}
	delete(s, id)
	return true
}