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Answers and rating deltas for

What's the significance of the second arguement in update() in Observer interface method

Author Votes Δ
Prahalad Deshpande 3 +1.51
Ravindra babu 0 -1.38
Ярослав Рахматуллин 0 -0.54
Shailendra 0 -0.80
Last visited: Jan 3, 2016, 9:42:40 AM