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Answers and rating deltas for

How do I check if a variable really responds_to :dup?

Author Votes Δ
Guilherme Bernal 6 +1.30
Linuxios 3 +0.05
Cary Swoveland 1 -0.96
rainkinz 1 -3.12
x-yuri 1 0.00
Last visited: Sep 14, 2014, 5:07:29 AM