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Answers and rating deltas for

What does <?> sign mean in ArrayList

Author Votes Δ
Nitzan Tomer 4 +3.96
Luchian Grigore 2 +0.50
aidanok 2 +1.63
Shawn Shroyer 0 -2.34
paulsm4 0 -0.36
Eng.Fouad 0 -0.55
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