public GoogleObserver(StockTicker subj)
{
DataSource = subj;
subj.Register(this);
}
public GoogleObserver(StockTicker stockTicker)
{
StockTicker = stockTicker;
stockTicker.Register(this);
}
public MicrosoftObserver(StockTicker subj)
{
DataSource = subj;
subj.Register(this);
}
public MicrosoftObserver(StockTicker stockTicker)
{
StockTicker = stockTicker;
stockTicker.Register(this);
}
