From: James Edward Gray II <james@...>
Date: 2007-02-02T05:54:37+09:00
Subject: Re: Hash.collect

On Feb 1, 2007, at 2:49 PM, Giant Cranes wrote:

> I have an array of hashes as follows:
>
> a = Array.new
> a << {:name => 'tony', :age => 23}
> a << {:name => 'mary', :age => 57}
> a << {:name => 'dom', :age => 17}
>
> I am trying to create an array with one attribute from each hash:
>
> ['tony', 'mary', 'dom']

 >> a = Array.new
=> []
 >> a << {:name => 'tony', :age => 23}
=> [{:name=>"tony", :age=>23}]
 >> a << {:name => 'mary', :age => 57}
=> [{:name=>"tony", :age=>23}, {:name=>"mary", :age=>57}]
 >> a << {:name => 'dom', :age => 17}
=> [{:name=>"tony", :age=>23}, {:name=>"mary", :age=>57},  
{:name=>"dom", :age=>17}]
 >> a.map { |e| e[:name] }
=> ["tony", "mary", "dom"]

Hope that helps.

James Edward Gray II