From: Oliver Saunders <oliver.saunders@...>
Date: 2008-07-11T06:11:21+09:00
Subject: Map with &:method_name

I see this a lot but it doesn't work for me in IRB. Is a gem required or
something?

>> [1,2,3].map(&:to_s)
TypeError: wrong argument type Symbol (expected Proc)
        from (irb):2
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