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Answers and rating deltas for

What is this Perl syntax construct?

Author Votes Δ
ikegami 7 +0.76
RobEarl 5 +0.45
marneborn 1 -1.64
Rob K 1 -0.57
flau 1 -1.78
Last visited: May 1, 2015, 9:18:00 PM