Пример #1
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 public OctalObserver(Subject subject)
 {
     _subject = subject;
     _subject.attach(this);
 }
Пример #2
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 public HexaObserver(Subject subject)
 {
     _subject = subject;
     _subject.attach(this);
 }
Пример #3
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 public BinaryObserver(Subject subject)
 {
     _subject = subject;
     _subject.attach(this);
 }