Проектирование Singleton с использованием метакласса
Данный шаблон проектирования ограничивает создание экземпляра класса только одним объектом. Это может оказаться полезным, например, при разработке класса для подключения к базе данных. Возможно, вы захотите иметь только один экземпляр класса соединения.
Проектирование Singleton с использованием метакласса
Данный шаблон проектирования ограничивает создание экземпляра класса только одним объектом. Это может оказаться полезным, например, при разработке класса для подключения к базе данных. Возможно, вы захотите иметь только один экземпляр класса соединения.
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