package dataext import "sync" type SyncSet[TData comparable] struct { data map[TData]bool lock sync.Mutex } func (s *SyncSet[TData]) Add(value TData) bool { s.lock.Lock() defer s.lock.Unlock() if s.data == nil { s.data = make(map[TData]bool) } _, ok := s.data[value] s.data[value] = true return !ok } func (s *SyncSet[TData]) AddAll(values []TData) { s.lock.Lock() defer s.lock.Unlock() if s.data == nil { s.data = make(map[TData]bool) } for _, value := range values { s.data[value] = true } } func (s *SyncSet[TData]) Contains(value TData) bool { s.lock.Lock() defer s.lock.Unlock() if s.data == nil { s.data = make(map[TData]bool) } _, ok := s.data[value] return ok } func (s *SyncSet[TData]) Get() []TData { s.lock.Lock() defer s.lock.Unlock() if s.data == nil { s.data = make(map[TData]bool) } r := make([]TData, 0, len(s.data)) for k := range s.data { r = append(r, k) } return r }