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Answers and rating deltas for

why we are using -1 in the following code?

Author Votes Δ
Evans 2 +4.56
Alexis C. 1 +0.59
Dark Knight 0 -0.38
Scott Helme 0 -0.55
AJ. 0 -1.85
Last visited: Sep 14, 2014, 5:07:29 AM