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Answers and rating deltas for

What is this meaning "if(<an integer> & 2)"?

Author Votes Δ
zw324 5 +0.83
Petar Minchev 5 +0.78
Wolph 3 -0.07
JAB 1 -1.03
Optox 1 -2.57
Last visited: Sep 14, 2014, 5:07:29 AM