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Answers and rating deltas for

What do these double parentheses do in JS?

Author Votes Δ
bizzehdee 3 +1.75
Zevi Sternlicht 0 -0.66
iConnor 0 -0.21
mash 0 -1.27
Trevor Dixon 0 -0.72
Last visited: Sep 14, 2014, 5:07:29 AM