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Answers and rating deltas for

What is .map() doing in this situation?

Author Votes Δ
nnnnnn 122 +0.95
ibrahim mahrir 38 +0.10
Vova Bilyachat 6 -0.66
Mariusz Pawelski 3 -3.15
Last visited: Dec 14, 2017, 4:32:24 PM