From: Brian Candler <b.candler@...>
Date: 2010-12-26T19:28:54+09:00
Subject: Re: array index inside map function

You can make this work in 1.8.7 too:

>> ["x","y","z"].each_with_index.map { |x| x }
=> [["x", 0], ["y", 1], ["z", 2]]

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