package utils

// Unique returns a new slice containing only the unique elements of the input slice,
// preserving their original order.
func Unique[T comparable](slice []T) []T {
	if slice == nil {
		return nil
	}
	seen := make(map[T]struct{})
	result := make([]T, 0)
	for _, item := range slice {
		if _, ok := seen[item]; ok {
			continue
		}
		seen[item] = struct{}{}
		result = append(result, item)
	}
	return result
}