From: Brian Candler <b.candler@...>
Date: 2009-08-04T17:14:42+09:00
Subject: Re: How to extract only needed attribute from an array

Joel VanderWerf wrote:
> p a.transpose[0] # ==> [1, 3, 5, 6, 7, 11]
> 
> Or:
> 
> p a.map {|b| b[0]}

Or:

p a.map {|(id,name)| id }
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