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Answers and rating deltas for

Why won't this print anything but null?

Author Votes Δ
Jagath Ariyarathne 0 +0.39
trentr 0 +0.25
iCurious 0 +0.25
Maroun 0 -0.15
LastFreeNickname 0 +0.30
Last visited: Apr 29, 2015, 4:40:39 PM