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Answers and rating deltas for

How can I make this function not generate a "doesn't return a value on all paths" warning?

Author Votes Δ
WizzardsApprentice 4 +4.51
paxdiablo 2 +0.27
Shoban 0 -0.55
Suresh Kumar 0 -2.28
Last visited: Sep 14, 2014, 5:07:29 AM