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Answers and rating deltas for

is this the correct way to test for a posted variables existence?

Author Votes Δ
Antony 1 +1.03
John 1 +1.29
SeanWM 0 -0.77
user2112300 0 -1.51
webbiedave 0 -1.36
Last visited: Sep 14, 2014, 5:07:29 AM